chore(release): 2.16.7 [skip ci]

## [2.16.7](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.16.6...v2.16.7) (2025-10-10)

### Bug Fixes

* compile TypeScript server files to JavaScript for production ([83b9a4d](83b9a4d976))
* remove standalone output mode incompatible with custom server ([c8da5a8](c8da5a8340))
* update Dockerfile for non-standalone production builds ([14746c5](14746c568e))

.claude/settings.local.json

@@ -168,9 +168,22 @@
       "Bash(open http://localhost:3001/arcade)",
       "Bash(open http://localhost:6006)",
       "Bash(open http://localhost:3002/games/matching)",
-      "Bash(open http://localhost:3002/create)"
+      "Bash(open http://localhost:3002/create)",
+      "Bash(open http://localhost:3002/games/complement-race/practice)",
+      "Bash(open http://localhost:3002/games/complement-race)",
+      "Bash(npx vitest run:*)",
+      "Bash(sqlite3:*)",
+      "Bash(NODE_ENV=development node server.js)",
+      "Bash(lsof:*)",
+      "Bash(xargs kill:*)",
+      "Bash(./test-arcade-api.sh:*)",
+      "Bash(pkill:*)",
+      "Bash(shasum:*)",
+      "Bash(open http://localhost:3000/arcade/matching)",
+      "Bash(echo:*)",
+      "Bash(npm run type-check:*)"
     ],
     "deny": [],
     "ask": []
   }
-}
+}

.claude/terminology.md

@@ -0,0 +1,57 @@
+# Soroban Abacus Flashcards - Terminology Reference
+
+## User vs Player vs Room Member
+
+**CRITICAL**: Do not confuse these three concepts!
+
+### Quick Reference
+
+- **USER** = Identity/account (one per person, identified by `guestId` cookie)
+- **PLAYER** = Game avatar/profile (multiple per user, from `players` table)
+- **ROOM MEMBER** = USER's participation in a multiplayer room
+
+### Key Rule
+
+**When a USER joins a room, their ACTIVE PLAYERS join the game.**
+
+Example:
+- USER "Jane" has 3 players: Alice, Bob, Charlie
+- Alice and Bob are active (`isActive: true`)
+- When Jane joins a room, Alice and Bob participate in the game
+- The `arcade_sessions.activePlayers` array contains `[alice_id, bob_id]`
+
+### Database Schema
+
+```
+users (identity)
+  ├─ players (avatars/profiles) - where isActive = true
+  └─ room_members (room participation)
+
+arcade_sessions
+  ├─ userId: references users.id
+  ├─ activePlayers: Array<player.id> ← PLAYER IDs, not USER IDs!
+  └─ roomId: references arcade_rooms.id
+```
+
+### Common Mistakes to Avoid
+
+❌ Using USER ID in `activePlayers` - should be PLAYER IDs
+❌ Assuming one USER = one PLAYER - users can have multiple players
+❌ Tracking game moves/scores by USER - should track by PLAYER
+❌ Confusing room_members.displayName with players.name - different concepts
+
+### Full Documentation
+
+See: `docs/terminology-user-player-room.md` for complete explanation with examples.
+
+## Other Project-Specific Terms
+
+### Arcade vs Games
+
+- **`/games/*`** - Single player or local multiplayer (same device)
+- **`/arcade/*`** - Online multiplayer with sessions and rooms
+
+### Session Types
+
+- **Solo Session**: `arcade_sessions.roomId = null`, user playing alone
+- **Room Session**: `arcade_sessions.roomId = room_xyz`, shared game state across room members

.dockerignore

@@ -1,5 +1,7 @@
 # Ignore development files
+# Ignore all node_modules to prevent Docker overlay conflicts
 node_modules
+**/node_modules
 .next
 .git
 .github

.github/workflows/deploy-storybook.yml

@@ -36,7 +36,7 @@ jobs:
       - name: Setup pnpm
         uses: pnpm/action-setup@v2
         with:
-          version: 8.0.0
+          version: 9.15.4
 
       - name: Get pnpm store directory
         shell: bash

.github/workflows/deploy.yml

@@ -18,7 +18,7 @@ jobs:
 
     - uses: pnpm/action-setup@v2
       with:
-        version: 8.0.0
+        version: 9.15.4
 
     - uses: actions/setup-node@v4
       with:

.github/workflows/release.yml

@@ -32,7 +32,7 @@ jobs:
       - name: Setup pnpm
         uses: pnpm/action-setup@v2
         with:
-          version: 8.0.0
+          version: 9.15.4
 
       - name: Get pnpm store directory
         shell: bash

.github/workflows/verify-examples.yml

@@ -46,7 +46,7 @@ jobs:
     
     - name: Upload example images if changed
       if: failure()
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: updated-examples
         path: docs/images/

.gitignore

@@ -10,6 +10,9 @@ dist/
 # Generated CSS (Panda CSS / styled-system)
 **/styled-system/
 
+# Generated build info
+**/generated/build-info.json
+
 # Environment
 .env*
 
@@ -40,6 +43,14 @@ Thumbs.db
 # Test coverage
 coverage/
 
+# Test reports
+playwright-report/
+
+# Database files
+*.db
+*.db-shm
+*.db-wal
+
 # Temporary files
 tmp/
 temp/

CHANGELOG.md

@@ -1,3 +1,728 @@
+## [2.16.7](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.16.6...v2.16.7) (2025-10-10)
+
+
+### Bug Fixes
+
+* compile TypeScript server files to JavaScript for production ([83b9a4d](https://github.com/antialias/soroban-abacus-flashcards/commit/83b9a4d976fa540782826afa13a35c92e706bf1e))
+* remove standalone output mode incompatible with custom server ([c8da5a8](https://github.com/antialias/soroban-abacus-flashcards/commit/c8da5a8340c8798bba452b43244bc0e04ce8b0c5))
+* update Dockerfile for non-standalone production builds ([14746c5](https://github.com/antialias/soroban-abacus-flashcards/commit/14746c568e58f4a847e0da2d866dbaeabf5a0e8b))
+
+## [2.16.6](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.16.5...v2.16.6) (2025-10-10)
+
+
+### Bug Fixes
+
+* correct static files and public path in Docker image ([c287b19](https://github.com/antialias/soroban-abacus-flashcards/commit/c287b19a39e1506033db6de39aa4d3761cb65d62))
+
+## [2.16.5](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.16.4...v2.16.5) (2025-10-09)
+
+
+### Bug Fixes
+
+* correct node_modules path for pnpm symlinks in Docker ([c12351f](https://github.com/antialias/soroban-abacus-flashcards/commit/c12351f2c99daaed710a1136eb13f6ccc54cbcff))
+
+## [2.16.4](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.16.3...v2.16.4) (2025-10-09)
+
+
+### Bug Fixes
+
+* correct Docker CMD to use root-level server.js ([48b47e9](https://github.com/antialias/soroban-abacus-flashcards/commit/48b47e9bdb0da44746282cd7cf7599a69bf5130d))
+
+## [2.16.3](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.16.2...v2.16.3) (2025-10-09)
+
+
+### Bug Fixes
+
+* use game state playerMetadata instead of GameModeContext in UI components ([388c254](https://github.com/antialias/soroban-abacus-flashcards/commit/388c25451d11b85236c1f7682fe2f7a62a15d5eb))
+
+## [2.16.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.16.1...v2.16.2) (2025-10-09)
+
+
+### Bug Fixes
+
+* use only local user's players in LocalMemoryPairsProvider ([c26138f](https://github.com/antialias/soroban-abacus-flashcards/commit/c26138ffb55a237a99cb6ff399c8a2ac54a22b51))
+
+## [2.16.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.16.0...v2.16.1) (2025-10-09)
+
+
+### Bug Fixes
+
+* convert LocalMemoryPairsProvider to pure client-side with useReducer ([b128db1](https://github.com/antialias/soroban-abacus-flashcards/commit/b128db1783a8dcffe7879745c3342add2f9ffe29))
+
+## [2.16.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.15.0...v2.16.0) (2025-10-09)
+
+
+### Features
+
+* fade out hover avatar when player stops hovering ([820eeb4](https://github.com/antialias/soroban-abacus-flashcards/commit/820eeb4fb03ad8be6a86dd0a26e089052224f427))
+
+## [2.15.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.14.3...v2.15.0) (2025-10-09)
+
+
+### Features
+
+* implement smooth hover avatar animations with react-spring ([442c6b4](https://github.com/antialias/soroban-abacus-flashcards/commit/442c6b4529ba5c820b1fe8a64805a3d85489a8ea))
+
+## [2.14.3](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.14.2...v2.14.3) (2025-10-09)
+
+
+### Bug Fixes
+
+* enable smooth spring animations between card hovers ([8d53b58](https://github.com/antialias/soroban-abacus-flashcards/commit/8d53b589aa17ebc6d0a9251b3006fd8a90f90a61))
+
+## [2.14.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.14.1...v2.14.2) (2025-10-09)
+
+
+### Bug Fixes
+
+* correct avatar positioning to prevent fly-in animation ([573d0df](https://github.com/antialias/soroban-abacus-flashcards/commit/573d0df20dcdac41021c46feb423dbf3782728f6))
+
+## [2.14.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.14.0...v2.14.1) (2025-10-09)
+
+
+### Bug Fixes
+
+* prevent avatar fly-in and hide local player's own hover ([7f65a67](https://github.com/antialias/soroban-abacus-flashcards/commit/7f65a67cef3d7f0ebce1bd7417972a6138acfc46))
+
+## [2.14.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.13.0...v2.14.0) (2025-10-09)
+
+
+### Features
+
+* improve hover avatars with smooth animation and 3D elevation ([71b11f4](https://github.com/antialias/soroban-abacus-flashcards/commit/71b11f4ef08a5f9c3f1c1aaabca21ef023d5c0ce))
+
+## [2.13.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.12.3...v2.13.0) (2025-10-09)
+
+
+### Features
+
+* implement networked hover presence for multiplayer gameplay ([62f3730](https://github.com/antialias/soroban-abacus-flashcards/commit/62f3730542334a0580f5dad1c73adc333614ee58))
+
+
+### Code Refactoring
+
+* move canModifyPlayers logic into provider layer ([db9f909](https://github.com/antialias/soroban-abacus-flashcards/commit/db9f9096b446b078e1b4dfe970723bef54a6f4ae))
+* properly separate LocalMemoryPairsProvider and RoomMemoryPairsProvider ([98822ec](https://github.com/antialias/soroban-abacus-flashcards/commit/98822ecda52bf004d9950e3f4c92c834fd820e49))
+
+## [2.12.3](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.12.2...v2.12.3) (2025-10-09)
+
+
+### Bug Fixes
+
+* always show game control buttons in room-based sessions ([14ba422](https://github.com/antialias/soroban-abacus-flashcards/commit/14ba422919abd648e2a134ce167a5e6fd9f84e73))
+
+## [2.12.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.12.1...v2.12.2) (2025-10-09)
+
+
+### Bug Fixes
+
+* use RoomMemoryPairsProvider in room page ([c279731](https://github.com/antialias/soroban-abacus-flashcards/commit/c27973191f0144604e17a8a14adf0a88df476e27))
+
+## [2.12.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.12.0...v2.12.1) (2025-10-09)
+
+
+### Bug Fixes
+
+* export MemoryPairsContext to fix provider hook error ([80ad33e](https://github.com/antialias/soroban-abacus-flashcards/commit/80ad33eec0b6946702eaa9cf1b1c246852864b00))
+
+## [2.12.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.11.0...v2.12.0) (2025-10-09)
+
+
+### Features
+
+* add networked hover state infrastructure for multiplayer presence ([d149799](https://github.com/antialias/soroban-abacus-flashcards/commit/d14979907c5df9b793a1c110028fc5b54457f507))
+
+## [2.11.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.10.1...v2.11.0) (2025-10-09)
+
+
+### Features
+
+* add pause/resume game state architecture ([05eacac](https://github.com/antialias/soroban-abacus-flashcards/commit/05eacac438dbaf405ce91e188c53dbbe2e9f9507))
+* add Resume button and config change warning to setup UI ([b5ee04f](https://github.com/antialias/soroban-abacus-flashcards/commit/b5ee04f57651f53517468fcc4c456f0ccb65a8e2))
+* implement pause/resume in game providers with optimistic updates ([ce30fca](https://github.com/antialias/soroban-abacus-flashcards/commit/ce30fcaf55270f9089249bd13ba73a25fbfa5ab4))
+
+
+### Bug Fixes
+
+* convert guestId to internal userId for player ownership check ([3a01f46](https://github.com/antialias/soroban-abacus-flashcards/commit/3a01f4637d2081c66fe37c7f8cfee229442ec744))
+* implement shared session architecture for room-based multiplayer ([2856f4b](https://github.com/antialias/soroban-abacus-flashcards/commit/2856f4b83fbcc6483d96cc6e7da2fe5bc911625d))
+
+## [2.10.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.10.1...v2.10.2) (2025-10-09)
+
+
+### Bug Fixes
+
+* convert guestId to internal userId for player ownership check ([3a01f46](https://github.com/antialias/soroban-abacus-flashcards/commit/3a01f4637d2081c66fe37c7f8cfee229442ec744))
+* implement shared session architecture for room-based multiplayer ([2856f4b](https://github.com/antialias/soroban-abacus-flashcards/commit/2856f4b83fbcc6483d96cc6e7da2fe5bc911625d))
+
+## [2.10.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.10.0...v2.10.1) (2025-10-09)
+
+
+### Bug Fixes
+
+* enforce player ownership authorization for multiplayer games ([71b0aac](https://github.com/antialias/soroban-abacus-flashcards/commit/71b0aac13c970c03fe8d296d41e9472ad72a00fa))
+
+## [2.10.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.9.0...v2.10.0) (2025-10-09)
+
+
+### Features
+
+* implement rich Radix UI tooltips for player avatars ([d03c789](https://github.com/antialias/soroban-abacus-flashcards/commit/d03c7898799b378f912f47d7267a00bc7ce3d580))
+
+## [2.9.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.8.7...v2.9.0) (2025-10-09)
+
+
+### Features
+
+* implement auto-save for player settings modal ([a83dc09](https://github.com/antialias/soroban-abacus-flashcards/commit/a83dc097e43c265a297281da54754f58ac831754))
+
+## [2.8.7](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.8.6...v2.8.7) (2025-10-09)
+
+
+### Bug Fixes
+
+* enable real-time player name updates across room members ([5171be3](https://github.com/antialias/soroban-abacus-flashcards/commit/5171be3d37980eb1c98aa0d1e1d6e06f589763d1))
+
+## [2.8.6](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.8.5...v2.8.6) (2025-10-09)
+
+
+### Bug Fixes
+
+* prevent duplicate display of network avatars in nav ([d474ef0](https://github.com/antialias/soroban-abacus-flashcards/commit/d474ef07d69cf0b4f5dedd404616e3bbee7289fe))
+
+## [2.8.5](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.8.4...v2.8.5) (2025-10-09)
+
+
+### Bug Fixes
+
+* remove redirect loop by not redirecting from room page ([10cf715](https://github.com/antialias/soroban-abacus-flashcards/commit/10cf71527f7cede7fd93e502dbfc59df99b5a524))
+
+## [2.8.4](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.8.3...v2.8.4) (2025-10-09)
+
+
+### Bug Fixes
+
+* prevent redirect loops by checking if already at target URL ([c5268b7](https://github.com/antialias/soroban-abacus-flashcards/commit/c5268b79dee66aa02e14e2024fe1c6242a172ed3))
+
+## [2.8.3](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.8.2...v2.8.3) (2025-10-08)
+
+
+### Bug Fixes
+
+* remove ArcadeGuardedPage from room page to prevent redirect loop ([4686f59](https://github.com/antialias/soroban-abacus-flashcards/commit/4686f59d245b2b502dc0764c223a5ce84bf1af44))
+
+## [2.8.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.8.1...v2.8.2) (2025-10-08)
+
+
+### Bug Fixes
+
+* revert to showing only active players in room games ([87cc0b6](https://github.com/antialias/soroban-abacus-flashcards/commit/87cc0b64fb5f3debaf1d2f122aecfefc62922fed))
+
+## [2.8.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.8.0...v2.8.1) (2025-10-08)
+
+
+### Bug Fixes
+
+* include all players from room members in room games ([28a2e7d](https://github.com/antialias/soroban-abacus-flashcards/commit/28a2e7d6511e70b83adf7d0465789a91026bc1f7))
+
+## [2.8.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.7.4...v2.8.0) (2025-10-08)
+
+
+### Features
+
+* implement room-wide multi-user game state synchronization ([8175c43](https://github.com/antialias/soroban-abacus-flashcards/commit/8175c43533c474fff48eb128c97747033bfb434a))
+
+
+### Tests
+
+* add comprehensive tests for arcade guard and room navigation ([b49630f](https://github.com/antialias/soroban-abacus-flashcards/commit/b49630f3cb02ebbac75b4680948bbface314dccb))
+
+## [2.7.4](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.7.3...v2.7.4) (2025-10-08)
+
+
+### Bug Fixes
+
+* respect enabled flag in useArcadeGuard WebSocket redirects ([01ff114](https://github.com/antialias/soroban-abacus-flashcards/commit/01ff114258ff7ab43ef2bd79b41c7035fe02ac70))
+
+
+### Code Refactoring
+
+* move room management pages to /arcade-rooms ([4316687](https://github.com/antialias/soroban-abacus-flashcards/commit/431668729cfb145d6e0c13947de2a82f27fa400d))
+
+## [2.7.3](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.7.2...v2.7.3) (2025-10-08)
+
+
+### Bug Fixes
+
+* set room sessions to use /arcade/room URL ([9dac431](https://github.com/antialias/soroban-abacus-flashcards/commit/9dac431c1f91c246f67a059cda3cff6cbef40a43))
+
+## [2.7.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.7.1...v2.7.2) (2025-10-08)
+
+
+### Bug Fixes
+
+* add hasAttemptedFetch flag to prevent premature redirect ([c30f585](https://github.com/antialias/soroban-abacus-flashcards/commit/c30f58581028878350282cad5231d614590d9f2b))
+
+## [2.7.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.7.0...v2.7.1) (2025-10-08)
+
+
+### Bug Fixes
+
+* resolve race condition in /arcade/room redirect ([5ed2ab2](https://github.com/antialias/soroban-abacus-flashcards/commit/5ed2ab21cab408147081a493c8dd6b1de48b2d01))
+
+## [2.7.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.6.0...v2.7.0) (2025-10-08)
+
+
+### Features
+
+* extend GameModeContext to support room-based multiplayer ([ee6094d](https://github.com/antialias/soroban-abacus-flashcards/commit/ee6094d59d26a9e80ba5d023ca6dc13143bea308))
+
+## [2.6.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.5.0...v2.6.0) (2025-10-08)
+
+
+### Features
+
+* refactor room addressing to /arcade/room ([e7d2a73](https://github.com/antialias/soroban-abacus-flashcards/commit/e7d2a73ddf2048691325a18e3d71a7ece444c131))
+
+## [2.5.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.4.6...v2.5.0) (2025-10-08)
+
+
+### Features
+
+* display room info and network players in mini app nav ([5e3261f](https://github.com/antialias/soroban-abacus-flashcards/commit/5e3261f3bec8c19ec88c9a35a7e6ef8eda88a55e))
+
+## [2.4.6](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.4.5...v2.4.6) (2025-10-08)
+
+
+### Bug Fixes
+
+* real-time room member updates via globalThis socket.io sharing ([94a1d9b](https://github.com/antialias/soroban-abacus-flashcards/commit/94a1d9b11058bfb4b54a4753e143cf85f215e913))
+
+## [2.4.5](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.4.4...v2.4.5) (2025-10-08)
+
+
+### Bug Fixes
+
+* send all members (not just online) in socket broadcasts ([3fa6cce](https://github.com/antialias/soroban-abacus-flashcards/commit/3fa6cce17a7acd940cf5a9e6433bf6c4b497540c))
+
+## [2.4.4](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.4.3...v2.4.4) (2025-10-08)
+
+
+### Bug Fixes
+
+* correctly access getSocketIO from dynamic import ([30abf33](https://github.com/antialias/soroban-abacus-flashcards/commit/30abf33ee86b36f2a98014e5b017fa8e466a2107))
+
+## [2.4.3](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.4.2...v2.4.3) (2025-10-08)
+
+
+### Bug Fixes
+
+* resolve socket-server import path for Next.js build ([12c3c37](https://github.com/antialias/soroban-abacus-flashcards/commit/12c3c37ff8e1d3df71d72e527c08fa975043c504))
+
+## [2.4.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.4.1...v2.4.2) (2025-10-08)
+
+
+### Bug Fixes
+
+* broadcast member join/leave events immediately via API ([ebfc88c](https://github.com/antialias/soroban-abacus-flashcards/commit/ebfc88c5ea0a8a0fdda039fa129e1054b9c42e65))
+
+## [2.4.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.4.0...v2.4.1) (2025-10-08)
+
+
+### Bug Fixes
+
+* make leave room button actually remove user from room ([49f12f8](https://github.com/antialias/soroban-abacus-flashcards/commit/49f12f8cab631fedd33f1bc09febfdc95e444625))
+
+## [2.4.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.3.1...v2.4.0) (2025-10-08)
+
+
+### Features
+
+* add arcade room/session info and network players to nav ([6800747](https://github.com/antialias/soroban-abacus-flashcards/commit/6800747f80a29c91ba0311a8330d594c1074097d))
+* add real-time WebSocket updates for room membership ([7ebb2be](https://github.com/antialias/soroban-abacus-flashcards/commit/7ebb2be3927762a5fe9b6fb7fb15d6b88abb7b6a))
+* implement modal room enforcement (one room per user) ([f005fbb](https://github.com/antialias/soroban-abacus-flashcards/commit/f005fbbb773f4d250b80d71593490976af82d5a5))
+* improve room navigation and membership UI ([bc219c2](https://github.com/antialias/soroban-abacus-flashcards/commit/bc219c2ad66707f03e7a6cf587b9d190c736e26d))
+
+
+### Bug Fixes
+
+* auto-cleanup orphaned arcade sessions without valid rooms ([3c002ab](https://github.com/antialias/soroban-abacus-flashcards/commit/3c002ab29d1b72a0e1ffb70bb0744dc560e7bdc2))
+* show correct join/leave button based on room membership ([5751dfe](https://github.com/antialias/soroban-abacus-flashcards/commit/5751dfef5c81981937cd5300c4256e5b74bb7488))
+
+## [2.3.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.3.0...v2.3.1) (2025-10-07)
+
+
+### Bug Fixes
+
+* add missing DOMPoint properties to getPointAtLength mock ([1e17278](https://github.com/antialias/soroban-abacus-flashcards/commit/1e17278f942b3fbcc5d05be746178f2e780f0bd9))
+* add missing name property to Passenger test mocks ([f8ca248](https://github.com/antialias/soroban-abacus-flashcards/commit/f8ca2488447e89151085942f708f6acf350a2747))
+* add non-null assertions to skillConfiguration utilities ([9c71092](https://github.com/antialias/soroban-abacus-flashcards/commit/9c7109227822884d25f8546739c80c6e7491e28d))
+* add optional chaining to stepBeadHighlights access ([a5fac5c](https://github.com/antialias/soroban-abacus-flashcards/commit/a5fac5c75c8cd67b218a5fd5ad98818dad74ab67))
+* add showAsAbacus property to ComplementQuestion type ([4adcc09](https://github.com/antialias/soroban-abacus-flashcards/commit/4adcc096430fbb03f0a8b2f0aef4be239aff9cd0))
+* add userId to optimistic player in useCreatePlayer ([5310463](https://github.com/antialias/soroban-abacus-flashcards/commit/5310463becd0974291cff49522ae5669a575410d))
+* change TypeScript moduleResolution from bundler to node ([327aee0](https://github.com/antialias/soroban-abacus-flashcards/commit/327aee0b4b5c0b0b2bf3eeb48d861bb3068f6127))
+* convert Jest mocks to Vitest in useSteamJourney tests ([e067271](https://github.com/antialias/soroban-abacus-flashcards/commit/e06727160c70a1ab38a003104d1fef8fb83ff92d))
+* convert player IDs from number to string in arcade tests ([72db1f4](https://github.com/antialias/soroban-abacus-flashcards/commit/72db1f4a2c3f930025cd5ced3fcf7c810dcc569d))
+* rewrite layout.nav.test to match actual RootLayout props ([a085de8](https://github.com/antialias/soroban-abacus-flashcards/commit/a085de816fcdeb055addabb8aec391b111cb5f94))
+* update useArcadeGuard tests with proper useViewerId mock ([4eb49d1](https://github.com/antialias/soroban-abacus-flashcards/commit/4eb49d1d44e1d85526ef6564f88a8fbcebffb4d2))
+* use Object.defineProperty for NODE_ENV in middleware tests ([e73191a](https://github.com/antialias/soroban-abacus-flashcards/commit/e73191a7298dbb6dd15da594267ea6221062c36b))
+* wrap Buffer in Uint8Array for Next.js Response API ([98384d2](https://github.com/antialias/soroban-abacus-flashcards/commit/98384d264e4a10d1836aa9f2e69151b122ffa7b0))
+
+
+### Documentation
+
+* add explicit package.json script references to regime docs ([3353bca](https://github.com/antialias/soroban-abacus-flashcards/commit/3353bcadc2849104248c624973274ed90b86722a))
+* establish mandatory code quality regime for Claude Code ([dd11043](https://github.com/antialias/soroban-abacus-flashcards/commit/dd1104310f4e0e85640730ea0e96e4adda4bc505))
+* expand quality regime to define "done" for all work ([f92f7b5](https://github.com/antialias/soroban-abacus-flashcards/commit/f92f7b592af38ba9d0f5b1db3a061d63d92a5093))
+
+## [2.3.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.2.1...v2.3.0) (2025-10-07)
+
+
+### Features
+
+* add Biome + ESLint linting setup ([fc1838f](https://github.com/antialias/soroban-abacus-flashcards/commit/fc1838f4f53a4f8d8f1c5303de3a63f12d9c9303))
+
+
+### Styles
+
+* apply Biome formatting to entire codebase ([60d70cd](https://github.com/antialias/soroban-abacus-flashcards/commit/60d70cd2f2f2b1d250c4c645889af4334968cb7e))
+
+## [2.2.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.2.0...v2.2.1) (2025-10-07)
+
+
+### Bug Fixes
+
+* remove remaining typst-dependent files ([d1b9b72](https://github.com/antialias/soroban-abacus-flashcards/commit/d1b9b72cfc2f2ba36c40d7ae54bc6fdfcc5f34da))
+
+## [2.2.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.1.3...v2.2.0) (2025-10-07)
+
+
+### Features
+
+* remove typst-related code and routes ([be6fb1a](https://github.com/antialias/soroban-abacus-flashcards/commit/be6fb1a881b983f9830d36c079b7b41f35153b8a))
+
+## [2.1.3](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.1.2...v2.1.3) (2025-10-07)
+
+
+### Bug Fixes
+
+* remove .npmrc from Dockerfile COPY ([e71c2b4](https://github.com/antialias/soroban-abacus-flashcards/commit/e71c2b4da85076dfc97401fc170cd88cb0aa4375))
+
+## [2.1.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.1.1...v2.1.2) (2025-10-07)
+
+
+### Bug Fixes
+
+* revert to default pnpm mode for Docker compatibility ([bd0092e](https://github.com/antialias/soroban-abacus-flashcards/commit/bd0092e69ac4f74ea89b8d31399cf72f57484cbb))
+
+## [2.1.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.1.0...v2.1.1) (2025-10-07)
+
+
+### Bug Fixes
+
+* ignore all node_modules in Docker ([4792dde](https://github.com/antialias/soroban-abacus-flashcards/commit/4792dde1beef9c6cb84a27bc6bb6acfa43919a72))
+
+## [2.1.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.0.7...v2.1.0) (2025-10-07)
+
+
+### Features
+
+* remove typst dependencies ([eedce28](https://github.com/antialias/soroban-abacus-flashcards/commit/eedce28572035897001f6b8a08f79beaa2360d44))
+
+## [2.0.7](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.0.6...v2.0.7) (2025-10-07)
+
+
+### Bug Fixes
+
+* preserve workspace node_modules in Docker for hoisted mode ([4f8aaf0](https://github.com/antialias/soroban-abacus-flashcards/commit/4f8aaf04aadda11ce9ec470dec44f78062929e77))
+
+## [2.0.6](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.0.5...v2.0.6) (2025-10-07)
+
+
+### Bug Fixes
+
+* ignore nested node_modules in Docker ([f554592](https://github.com/antialias/soroban-abacus-flashcards/commit/f554592272c2e92d7f1ec6550211518de9c3242f))
+
+## [2.0.5](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.0.4...v2.0.5) (2025-10-07)
+
+
+### Bug Fixes
+
+* use .npmrc in Docker for hoisted mode consistency ([2df8cdc](https://github.com/antialias/soroban-abacus-flashcards/commit/2df8cdc88ed03b6b04642a3441e17c6fda11d2a5))
+
+## [2.0.4](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.0.3...v2.0.4) (2025-10-07)
+
+
+### Bug Fixes
+
+* remove .npmrc in Docker to avoid hoisted mode issues ([2a77d75](https://github.com/antialias/soroban-abacus-flashcards/commit/2a77d755b7820b5b6b52ea99db418e6d071d726e))
+
+## [2.0.3](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.0.2...v2.0.3) (2025-10-07)
+
+
+### Bug Fixes
+
+* remove duplicate PlayerStatusBar story file from arcade ([4e721f7](https://github.com/antialias/soroban-abacus-flashcards/commit/4e721f765a29fe8628d4e34ef94cdf5728eea3dc))
+
+## [2.0.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.0.1...v2.0.2) (2025-10-07)
+
+
+### Bug Fixes
+
+* update Dockerfile pnpm version and fix TypeScript config ([43077a8](https://github.com/antialias/soroban-abacus-flashcards/commit/43077a80e271a793c88f100874914ae6f3c515b5))
+
+## [2.0.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v2.0.0...v2.0.1) (2025-10-07)
+
+
+### Bug Fixes
+
+* add @types/minimatch to abacus-react devDependencies ([fa45475](https://github.com/antialias/soroban-abacus-flashcards/commit/fa4547543dcd0cddc7cc9ff9da62f60a4717fb1f))
+
+## [2.0.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v1.2.1...v2.0.0) (2025-10-07)
+
+
+### ⚠ BREAKING CHANGES
+
+* abacus-react package now has independent versioning from monorepo
+
+### Features
+
+* **abacus-react:** add dual publishing to npm and GitHub Packages ([242ee52](https://github.com/antialias/soroban-abacus-flashcards/commit/242ee523edebe2cfc5db27cc72fba0315072bec2))
+* **abacus-react:** comprehensive README overhaul with current capabilities ([0ce351e](https://github.com/antialias/soroban-abacus-flashcards/commit/0ce351e572ac34fa816ee7533a26403c843d93f3))
+* **abacus-react:** configure GitHub Packages-only publishing workflow ([5eeedd9](https://github.com/antialias/soroban-abacus-flashcards/commit/5eeedd9a59a6b3898cadb30c413daa791a9561ee))
+* **abacus-react:** enable dual publishing to npm and GitHub Packages ([176a196](https://github.com/antialias/soroban-abacus-flashcards/commit/176a1961d05f99908a72837cf4e8ec93c0d33145))
+* **abacus-react:** enhance package description with semantic versioning details ([af037b5](https://github.com/antialias/soroban-abacus-flashcards/commit/af037b5e0a1ded5460f95498eb1fb5ac19c2e3fa))
+* **abacus-react:** implement GitHub Packages-only publishing workflow ([b194599](https://github.com/antialias/soroban-abacus-flashcards/commit/b194599f6029015b1aba0e57eb5fe9f83b89d403))
+* **abacus-react:** implement GitHub-only semantic release with manual package publishing ([33b0567](https://github.com/antialias/soroban-abacus-flashcards/commit/33b056769811d1cf1c41dee9e65f6e12188e6f5f))
+* **abacus-react:** simplify to GitHub Packages-only publishing ([acc126b](https://github.com/antialias/soroban-abacus-flashcards/commit/acc126bd5a0f0b2017263593ac2e3a180606f17b))
+* **abacus-react:** update description to mention GitHub Packages support ([af77256](https://github.com/antialias/soroban-abacus-flashcards/commit/af7725622e15801f9e56af12930c4e14c5e67c53))
+* **abacus-react:** use environment variables to override npm registry ([ad444e1](https://github.com/antialias/soroban-abacus-flashcards/commit/ad444e108f76d3014e492ddc94de0e52c61743ea))
+* add API routes for players and user stats ([6f940e2](https://github.com/antialias/soroban-abacus-flashcards/commit/6f940e24d663cc06084a943df4743c2a1c1b3c33))
+* add arcade matching game components and utilities ([ff16303](https://github.com/antialias/soroban-abacus-flashcards/commit/ff16303a7cd2880fcdfd51ef8a744e245905d87d))
+* add arcade room system database schema and managers (Phase 1) ([a9175a0](https://github.com/antialias/soroban-abacus-flashcards/commit/a9175a050c1668a6ba066078e0bdbd944b4eb960))
+* add build info API endpoint ([571664e](https://github.com/antialias/soroban-abacus-flashcards/commit/571664e725b63f22fa9f0bca8a1c518a54441dec))
+* add build info generation script ([416dc89](https://github.com/antialias/soroban-abacus-flashcards/commit/416dc897e26ab93930b52faf77da3a6ffd4a0fb9))
+* add category browsing and scrolling to emoji picker ([616a50e](https://github.com/antialias/soroban-abacus-flashcards/commit/616a50e234f79e271cb0bd9c959866d2d2e5ac82))
+* add complement display options and unify equation display ([2ed7b2c](https://github.com/antialias/soroban-abacus-flashcards/commit/2ed7b2cbf8ad7c18b14c0e86b04a3ba96cc4de0b))
+* add Complement Race game with three unique game modes ([582bce4](https://github.com/antialias/soroban-abacus-flashcards/commit/582bce411f5e89fe1ee677321d06ca7d0fd78701))
+* add comprehensive E2E testing with Playwright ([d58053f](https://github.com/antialias/soroban-abacus-flashcards/commit/d58053fad3ab06b9884b46dbb6807e938426dbb5))
+* add comprehensive Storybook stories for PlayerStatusBar ([8973241](https://github.com/antialias/soroban-abacus-flashcards/commit/8973241297d50604028bde95b9ebbf033688db89))
+* add configuration access to active player emojis in prominent nav ([6049a7f](https://github.com/antialias/soroban-abacus-flashcards/commit/6049a7f6b7481ca42a7907d11d93676549bf6629))
+* add configuration access to fullscreen player selection ([b85968b](https://github.com/antialias/soroban-abacus-flashcards/commit/b85968bcb6afa379d50242185e7743f6fe4ba982))
+* add consecutive match tracking system for escalating celebrations ([111c0ce](https://github.com/antialias/soroban-abacus-flashcards/commit/111c0ced715be7cade006387d01f4e2f52c59be9))
+* add CSS animations and visual feedback system ([80e33e2](https://github.com/antialias/soroban-abacus-flashcards/commit/80e33e25b3d30a44a1a5294997d56949e2aeef8b))
+* add deployment info modal with keyboard shortcut ([43be7ac](https://github.com/antialias/soroban-abacus-flashcards/commit/43be7ac83a9ba3e0ad970f4588729ba2ad394702))
+* add direct URL routes for each game mode ([a08f053](https://github.com/antialias/soroban-abacus-flashcards/commit/a08f0535bf6dfb424e8f9764b37ce6912db6021c))
+* add exitSession to MemoryPairsContextValue interface ([abc2ea5](https://github.com/antialias/soroban-abacus-flashcards/commit/abc2ea50d07e87537ced649bcc9276ef95a3bc4e))
+* add GameControlButtons component with unit tests ([1f45c17](https://github.com/antialias/soroban-abacus-flashcards/commit/1f45c17e0a68db2a452844f87217671223cf7bb0))
+* add guest session system with JWT tokens ([10d8aaf](https://github.com/antialias/soroban-abacus-flashcards/commit/10d8aaf814275a9c3f08e0f1b39970c3ab1a8427))
+* add initialStyle prop to ComplementRaceProvider ([f3bc2f6](https://github.com/antialias/soroban-abacus-flashcards/commit/f3bc2f6d926b9c8d9229636e3ed688bf9ea3baf3))
+* add intelligent on-screen number pad for devices without keyboards ([d4740ff](https://github.com/antialias/soroban-abacus-flashcards/commit/d4740ff99709be915c41f51d973706f6ff2774b3))
+* add interactive remove buttons for players in mini nav ([fa1cf96](https://github.com/antialias/soroban-abacus-flashcards/commit/fa1cf967898bdc396b0bfdcbfe2147a06e189190))
+* add magnifying glass preview on emoji hover ([2c88b6b](https://github.com/antialias/soroban-abacus-flashcards/commit/2c88b6b5f3ba3a47007aa832c2e204bf2ebcc90b))
+* add middleware for pathname header support in [@nav](https://github.com/nav) fallback ([b7e7c4b](https://github.com/antialias/soroban-abacus-flashcards/commit/b7e7c4beff1e37e90e9e20a890c5af7a134a7fca))
+* add mini app nav to arcade page ([a854fe3](https://github.com/antialias/soroban-abacus-flashcards/commit/a854fe3dc935b10db8dc71569c0c8abd81938e4c))
+* add optimistic updates and remove dead code ([b62cf26](https://github.com/antialias/soroban-abacus-flashcards/commit/b62cf26fb6597bae9a590f8b8d630fd31a8dd321))
+* add passenger boarding system with station-based pickup ([23a9016](https://github.com/antialias/soroban-abacus-flashcards/commit/23a9016245e061b65151735db31aebdc9d36ed1d))
+* add player types and migration utilities ([79f44b2](https://github.com/antialias/soroban-abacus-flashcards/commit/79f44b25d6c17f119c3ae225fb449be27c77c56d))
+* add PlayerStatusBar with escalating celebration animations ([7f8c90a](https://github.com/antialias/soroban-abacus-flashcards/commit/7f8c90acea84b208df0e3e23e80a02cf425c0950))
+* add prominent game context display to mini nav with smooth transitions ([8792393](https://github.com/antialias/soroban-abacus-flashcards/commit/8792393956b01a5a8ca67d78209e6defb6a11903))
+* add React Query setup with api helper ([a3878a8](https://github.com/antialias/soroban-abacus-flashcards/commit/a3878a8537fe123fa345d2d2990b3cd76132ba1e))
+* add realistic mountains with peaks and ground terrain ([99cdfa8](https://github.com/antialias/soroban-abacus-flashcards/commit/99cdfa8a0ba63e7b523466d8b2108bca05b0310a))
+* add security tests and userId injection protection ([aa1ad31](https://github.com/antialias/soroban-abacus-flashcards/commit/aa1ad315ef75af5b6833a3a3628a9bbceb80c03c))
+* add server-side validation for player modifications during active arcade sessions ([3b3cad4](https://github.com/antialias/soroban-abacus-flashcards/commit/3b3cad4b769b0ed9ed8e6dc2363bcaf13cc8e08a))
+* add Setup button to exit arcade sessions ([ae1318e](https://github.com/antialias/soroban-abacus-flashcards/commit/ae1318e8bf2c584853ceeb38336d871110f13a39))
+* add smooth spring animations to pressure gauge ([863a2e1](https://github.com/antialias/soroban-abacus-flashcards/commit/863a2e1319448381c853540301886fb4a169e112))
+* add sound settings support to AbacusReact component ([90b9ffa](https://github.com/antialias/soroban-abacus-flashcards/commit/90b9ffa0d8659891bfe8062217e45245bbff5d5a))
+* add train car system with smooth boarding/disembarking animations ([1613912](https://github.com/antialias/soroban-abacus-flashcards/commit/1613912740756d984205e3625791c1d8a2a6fa51))
+* add Web Audio API sound effects system with 16 sound types ([90ba866](https://github.com/antialias/soroban-abacus-flashcards/commit/90ba86640c7062a00d2c7553827a61524ec17da1))
+* **complement-race:** add abacus displays to pressure gauge ([c5ebc63](https://github.com/antialias/soroban-abacus-flashcards/commit/c5ebc635afb6e78f9f4b1192ff39dcec53879a60))
+* complete themed navigation system with game-specific chrome ([0a4bf17](https://github.com/antialias/soroban-abacus-flashcards/commit/0a4bf1765cbd86bf6f67fb3b99c577cfe3cce075))
+* create mode selection landing page for Complement Race ([1ff9695](https://github.com/antialias/soroban-abacus-flashcards/commit/1ff9695f6930f5232b2ad80ddcbd32bbc182d4e7))
+* create PlayerConfigDialog component for player customization ([4f2a661](https://github.com/antialias/soroban-abacus-flashcards/commit/4f2a661494add3f61b714d0bead07b0e0bc3f92d))
+* create StandardGameLayout for perfect viewport sizing ([728a920](https://github.com/antialias/soroban-abacus-flashcards/commit/728a92076a6ac9ef71f0c75d2e9503575881130a))
+* display passengers visually on train and at stations ([1599904](https://github.com/antialias/soroban-abacus-flashcards/commit/159990489fec9162d9ed9ecf77c7592b776bbb23))
+* dynamic player card rendering on games page ([81d17f2](https://github.com/antialias/soroban-abacus-flashcards/commit/81d17f23976cc340e23c63f8e27f1a15afd1a4d0))
+* dynamically calculate train cars based on max concurrent passengers ([9ea1553](https://github.com/antialias/soroban-abacus-flashcards/commit/9ea15535d18efc25739342b0945c6d7ec7896c5d))
+* emit session-state after creating arcade session ([70d6f43](https://github.com/antialias/soroban-abacus-flashcards/commit/70d6f43d6d7ff918ab15edb6e27d4eab8c7a3de6))
+* enable prominent nav and fix layout on arcade page ([5c8c18c](https://github.com/antialias/soroban-abacus-flashcards/commit/5c8c18cbb89da38ccaab3c2ad7081e1a6d45a73e))
+* enhance emoji picker with super powered magnifying glass and hide empty categories ([d8b4e42](https://github.com/antialias/soroban-abacus-flashcards/commit/d8b4e425bf019c593abdcb7693a04e4780b18f06))
+* enhance passenger card UI with boarding status indicators ([4bbdabc](https://github.com/antialias/soroban-abacus-flashcards/commit/4bbdabc3b576ba8cdda5a053878b3f2e9004afca))
+* extend ground terrain to cover entire track area ([ee48417](https://github.com/antialias/soroban-abacus-flashcards/commit/ee48417abfe9f5a2788d6de8ff522f60c13b6066))
+* extend player customization to support all 4 players ([72f8dee](https://github.com/antialias/soroban-abacus-flashcards/commit/72f8dee183b17c88d51748b5131b5a51906a24b3))
+* extend railroad track to viewport edges ([eadd7da](https://github.com/antialias/soroban-abacus-flashcards/commit/eadd7da6dbc4103342dd673f03f97850cdc20f23))
+* extend track and tunnels to absolute viewport edges ([f7419bc](https://github.com/antialias/soroban-abacus-flashcards/commit/f7419bc6a0c03cbe2dbbc095e47891ee67d10b51))
+* implement [@nav](https://github.com/nav) parallel routes for game name display in mini navigation ([885fc72](https://github.com/antialias/soroban-abacus-flashcards/commit/885fc725dc0bb41bbb5e500c2c907c6182192854))
+* implement cozy sound effects for abacus with variable intensity ([c95be1d](https://github.com/antialias/soroban-abacus-flashcards/commit/c95be1df6dbe74aad08b9a1feb1f33688212be0b))
+* implement cozy sound effects for abacus with variable intensity ([cea5fad](https://github.com/antialias/soroban-abacus-flashcards/commit/cea5fadbe4b4d5ae9e0ee988e9b1c4db09f21ba6))
+* implement game control callbacks in MemoryPairsGame ([4758ad2](https://github.com/antialias/soroban-abacus-flashcards/commit/4758ad2f266ef3f3f67c22533fbb5f475dd8bd5b))
+* implement game theming system with context-based navigation chrome ([3fa11c4](https://github.com/antialias/soroban-abacus-flashcards/commit/3fa11c4fbcbeabeb3bdd0db38374fb9a13cbb754))
+* implement innovative dynamic two-panel layout for on-screen keyboard ([4bb8f6d](https://github.com/antialias/soroban-abacus-flashcards/commit/4bb8f6daf1f3eecb5cbaf31bf4057f43e43aeb07))
+* implement mobile-first responsive design for speed memory quiz ([13efc4d](https://github.com/antialias/soroban-abacus-flashcards/commit/13efc4d0705bb9e71a2002689a4ebac109caacc2))
+* implement simple fixed bottom keyboard bar ([9ef72d7](https://github.com/antialias/soroban-abacus-flashcards/commit/9ef72d7e88a6a9b30cfd7a7d3944197cc1e0037a))
+* implement smooth train exit with fade-out through right tunnel ([0176694](https://github.com/antialias/soroban-abacus-flashcards/commit/01766944f0267b1f2adeb6a30c9f89d48038a7f8))
+* implement toggleable on-screen keyboard to prevent UI overlap ([701d23c](https://github.com/antialias/soroban-abacus-flashcards/commit/701d23c36992b09c075e1a394f8a72edffb919f9))
+* improve game availability logic and messaging ([9a3fa93](https://github.com/antialias/soroban-abacus-flashcards/commit/9a3fa93e53d05475844b54052acbc838d7487d23))
+* increase landmark emoji size for better visibility ([0bcd7a3](https://github.com/antialias/soroban-abacus-flashcards/commit/0bcd7a30d42a0a0d5bdfcf5abd8eb3eb9a8b6a73))
+* integrate GameControlButtons into navigation ([fbd8cd4](https://github.com/antialias/soroban-abacus-flashcards/commit/fbd8cd4a6bca44bbc0f7c4e8153900558805a84a))
+* integrate remaining game sound effects ([600bc35](https://github.com/antialias/soroban-abacus-flashcards/commit/600bc35bc3111a455290638e7be31d0032ff656c))
+* integrate sound effects into game flow (countdown, answers, performance) ([8c3a855](https://github.com/antialias/soroban-abacus-flashcards/commit/8c3a85523930fca7f2dcc53c79454fb9be523d55))
+* integrate user profiles with PlayerStatusBar and game results ([beff646](https://github.com/antialias/soroban-abacus-flashcards/commit/beff64652c72a5cd0c008891b6dc2f5167e28b62))
+* make Steam Sprint infinite mode ([32c3a35](https://github.com/antialias/soroban-abacus-flashcards/commit/32c3a35eabd10f8c9b50a55cfb525a76ea050914))
+* make SVG span full viewport width for sprint mode ([7488bb3](https://github.com/antialias/soroban-abacus-flashcards/commit/7488bb38033b2d3d3fc18b9f09373506d69e25a5))
+* migrate abacus display settings to database ([92ef136](https://github.com/antialias/soroban-abacus-flashcards/commit/92ef1360a4792d0b36f3a35e100bd9f3c7451656))
+* migrate contexts to React Query (remove localStorage) ([fe01a1f](https://github.com/antialias/soroban-abacus-flashcards/commit/fe01a1fe182293aeadd5cbfd73f0a54a858ae38e))
+* migrate contexts to UUID-based player system ([2b94cad](https://github.com/antialias/soroban-abacus-flashcards/commit/2b94cad11bd05b1a324e360c56be686c3c6a4b64))
+* preserve track and passengers during route transitions ([f2e7165](https://github.com/antialias/soroban-abacus-flashcards/commit/f2e71657dc1587c2b6df1f4227160b8a261c6084))
+* redesign passenger cards with vintage train station aesthetic ([651bc21](https://github.com/antialias/soroban-abacus-flashcards/commit/651bc2158361fbaafb0b011ab90006b21d3a7c85))
+* set up automated npm publishing for @soroban/abacus-react package ([dd80d29](https://github.com/antialias/soroban-abacus-flashcards/commit/dd80d29c979e20b4d3624cf66be79ec51d5f53a9))
+* set up Drizzle ORM with SQLite database ([5d5afd4](https://github.com/antialias/soroban-abacus-flashcards/commit/5d5afd4e6860241ff45c7173d4aad2b7156a41b1))
+* skip countdown for train mode (sprint) ([65dafc9](https://github.com/antialias/soroban-abacus-flashcards/commit/65dafc92153399336f200a566bc91f869fdfcbb1))
+* skip intro screen and start directly at game setup ([4b6888a](https://github.com/antialias/soroban-abacus-flashcards/commit/4b6888af05c6be9616cf20b9d2b8b66ac13cf253))
+* sync URL with selected game mode ([3920bba](https://github.com/antialias/soroban-abacus-flashcards/commit/3920bbad33ef5dd6323d2baea498943f5115dbec))
+* UI polish for Sprint mode (viewport, backgrounds, data attributes) ([90ad789](https://github.com/antialias/soroban-abacus-flashcards/commit/90ad789ff1f94f52b98de9fd934a623eab452387))
+* update nav components for UUID players ([e85d041](https://github.com/antialias/soroban-abacus-flashcards/commit/e85d0415f23049da861533bbec2a65e1d84adfe1))
+* use CSS transitions for smooth fullscreen player selection collapse ([3189832](https://github.com/antialias/soroban-abacus-flashcards/commit/31898328a391614a0fe8d24ec9d2881bfb6e6984))
+* wire player configuration through nav component hierarchy ([edfdd81](https://github.com/antialias/soroban-abacus-flashcards/commit/edfdd8122774e36dbda9acea741a5e248be95676))
+
+
+### Bug Fixes
+
+* **abacus-react:** add debugging and explicit authentication for npm publish ([b82e9bb](https://github.com/antialias/soroban-abacus-flashcards/commit/b82e9bb9d6adf3793065067f96c6fbbfd1a78bca))
+* **abacus-react:** add packages: write permission for GitHub Packages publishing ([8e16487](https://github.com/antialias/soroban-abacus-flashcards/commit/8e1648737de9305f82872cb9b86b98b5045f77a7))
+* **abacus-react:** apply global columnPosts styling and fix reckoning bar width ([bb9959f](https://github.com/antialias/soroban-abacus-flashcards/commit/bb9959f7fb8985e0c6496247306838d97e7121f7))
+* **abacus-react:** force npm to use GitHub Packages registry ([5e6c901](https://github.com/antialias/soroban-abacus-flashcards/commit/5e6c901f73a68b60ec05f19c4a991ca8affc1589))
+* **abacus-react:** improve publishing workflow with better version sync ([7a4ecd2](https://github.com/antialias/soroban-abacus-flashcards/commit/7a4ecd2b5970ed8b6bfde8938b36917f8e7a7176))
+* **abacus-react:** improve workspace dependency cleanup and add validation ([11fd6f9](https://github.com/antialias/soroban-abacus-flashcards/commit/11fd6f9b3deb1122d3788a7e0698de891eeb0f3a))
+* **abacus-react:** resolve workspace dependencies before npm publish ([834b062](https://github.com/antialias/soroban-abacus-flashcards/commit/834b062b2d22356b9d96bb9c3c444eccaa51d793))
+* **abacus-react:** simplify semantic-release config to resolve dependency issues ([88cab38](https://github.com/antialias/soroban-abacus-flashcards/commit/88cab380ef383c941b41671d58d3e35fcaefb2d3))
+* **abacus-react:** temporarily allow test failures during setup phase ([e3db7f4](https://github.com/antialias/soroban-abacus-flashcards/commit/e3db7f4daf16fce82bccfe47dcaa90d7f4896a79))
+* add CLEAR_MISMATCH move to allow mismatch feedback to auto-dismiss ([158f527](https://github.com/antialias/soroban-abacus-flashcards/commit/158f52773d20dfab7dc55575d9999f32b4c589a2))
+* add missing GameThemeContext file for themed navigation ([d4fbdd1](https://github.com/antialias/soroban-abacus-flashcards/commit/d4fbdd14630e2f2fcdbc0de23ccc4ccd9eb74b48))
+* add npmrc for hoisting and fix template paths ([5c65ac5](https://github.com/antialias/soroban-abacus-flashcards/commit/5c65ac5caabb7197f069344d0ed29d02c3de2b9a))
+* add Python setuptools and build tools for better-sqlite3 compilation ([a216a3d](https://github.com/antialias/soroban-abacus-flashcards/commit/a216a3d3435a132c8add0a7c711b021bf4b1555f))
+* add testing mode for on-screen keyboard and fix toggle functionality ([904074c](https://github.com/antialias/soroban-abacus-flashcards/commit/904074ca821b62cd6b1e129354eb36c5dd4b5e7f))
+* align all bottom UI elements to same 20px baseline ([076c97a](https://github.com/antialias/soroban-abacus-flashcards/commit/076c97abac7a33f600b80083d8990a8c4a51be99))
+* align bottom-positioned UI elements ([227cfab](https://github.com/antialias/soroban-abacus-flashcards/commit/227cfabf113bc875ea3a61f0de41a9093ad1dd30))
+* allow navigation to game setup pages without active session ([c7ad3c0](https://github.com/antialias/soroban-abacus-flashcards/commit/c7ad3c069502580d1e72e7cc01e7b1f793ba9357))
+* change pressure gauge to fixed positioning to stay above terrain ([1b11031](https://github.com/antialias/soroban-abacus-flashcards/commit/1b110315982f631dadca96a37fc88db98a7f9cca))
+* change question display to fixed positioning with higher z-index ([4ac8758](https://github.com/antialias/soroban-abacus-flashcards/commit/4ac875895781dba5e115eeb3336ef76744b782bb))
+* **complement-race:** improve abacus display in equations ([491b299](https://github.com/antialias/soroban-abacus-flashcards/commit/491b299e28ee82c49069cf892609b1b2b3c0aee3))
+* **complement-race:** prevent passengers being left behind at delivery stations ([e6ebecb](https://github.com/antialias/soroban-abacus-flashcards/commit/e6ebecb09b1e5dd78c2dc11e125399082fb420ab))
+* correct emoji category group IDs to match Unicode CLDR ([b2a21b7](https://github.com/antialias/soroban-abacus-flashcards/commit/b2a21b79ad705a5b52767317af00e4d666d33907))
+* defer URL update until game starts ([12c54b2](https://github.com/antialias/soroban-abacus-flashcards/commit/12c54b27b717e852b96585eacdf6e9d964e32c50))
+* delay passenger display update until train resets ([e06a750](https://github.com/antialias/soroban-abacus-flashcards/commit/e06a7504549bb4e0fcc38bd03249b9c0386c3079))
+* disable turn validation in arcade mode matching game ([7c0e6b1](https://github.com/antialias/soroban-abacus-flashcards/commit/7c0e6b142b90f0fc3d444b3dcc1fff1512a0a3b2))
+* eliminate rail jaggies on sharp curves by increasing sampling density ([46d4af2](https://github.com/antialias/soroban-abacus-flashcards/commit/46d4af2bdad761366890171cc666ba24d5309257))
+* enable shamefully-hoist for semantic-release dependencies ([6168c29](https://github.com/antialias/soroban-abacus-flashcards/commit/6168c292d5f15748e80610103a6a787c0cf29d0f))
+* enforce playerId must be explicitly provided in arcade moves ([d5a8a2a](https://github.com/antialias/soroban-abacus-flashcards/commit/d5a8a2a14cb14ecd00827ddc96873f3db79573fd))
+* ensure consistent r×c grid layout for memory matching game ([f1a0633](https://github.com/antialias/soroban-abacus-flashcards/commit/f1a0633596fd1bb53418e56e28f3f27d3fce8b54))
+* ensure game names persist in navigation on page reload ([9191b12](https://github.com/antialias/soroban-abacus-flashcards/commit/9191b124934b9a5577a91f67e8fb6f83b173cc4f))
+* ensure passengers only travel forward on train route ([8ad3144](https://github.com/antialias/soroban-abacus-flashcards/commit/8ad3144d2da9b4ceedd62a9f379f664fa9381afe))
+* export missing hooks and types from @soroban/abacus-react package ([423ba55](https://github.com/antialias/soroban-abacus-flashcards/commit/423ba5535023928f1e0198b2bd01c3c6cf7ee848))
+* implement route-based theme detection for page reload persistence ([3dcff2f](https://github.com/antialias/soroban-abacus-flashcards/commit/3dcff2ff888558d7b746a732cfd53a1897c2b1df))
+* improve navigation chrome background color extraction from gradients ([00bfcbc](https://github.com/antialias/soroban-abacus-flashcards/commit/00bfcbcdee28d63094c09a4ae0359789ebcf4a22))
+* increase question display zIndex to stay above terrain ([8c8b8e0](https://github.com/antialias/soroban-abacus-flashcards/commit/8c8b8e08b4d51e6462d4b7dd258a25e64bf16dba))
+* lazy-load database connection to prevent build-time access ([af8d993](https://github.com/antialias/soroban-abacus-flashcards/commit/af8d9936285c697ff45700115eba83b5debdf9ad))
+* make results screen compact to fit viewport without scrolling ([9d4cba0](https://github.com/antialias/soroban-abacus-flashcards/commit/9d4cba05be84e7c162d706c8697eede23314b1a4))
+* migrate viewport from metadata to separate viewport export ([1fe12c4](https://github.com/antialias/soroban-abacus-flashcards/commit/1fe12c4837b1229d0f0ab93c55d0ffb504eb8721))
+* move auth.ts to src/ to match @/ path alias ([7829d8a](https://github.com/antialias/soroban-abacus-flashcards/commit/7829d8a0fb86dac07aa1b2fb0b68908e7e8381b8))
+* move fontWeight to style object for station names ([05a3ddb](https://github.com/antialias/soroban-abacus-flashcards/commit/05a3ddb086e28529efb321943f4e423dbe5ed6a6))
+* only show configuration gear icon for players 1 and 2 ([d0a3bc7](https://github.com/antialias/soroban-abacus-flashcards/commit/d0a3bc7dc1efc00c1db63fb50bc2ab3c6aabdd59))
+* pass player IDs (not user IDs) in all arcade game moves ([d00abd2](https://github.com/antialias/soroban-abacus-flashcards/commit/d00abd25e755c0304517a7953cb78022a073b7c3))
+* passengers now board/disembark based on their car position, not locomotive ([96782b0](https://github.com/antialias/soroban-abacus-flashcards/commit/96782b0e7a6d0db5a4435ca303b1d819947ce460))
+* position tunnels at absolute viewBox edges ([1a5fa28](https://github.com/antialias/soroban-abacus-flashcards/commit/1a5fa2873bcda9a24cc578a7ecea43632077a0a1))
+* prevent layout shift when selecting Steam Sprint mode ([73a5974](https://github.com/antialias/soroban-abacus-flashcards/commit/73a59745a5145b734b0893a489c5d018e3c9475c))
+* prevent multiple passengers from boarding same car in single frame ([63b0b55](https://github.com/antialias/soroban-abacus-flashcards/commit/63b0b552a89a1165137de125bf57246a7cf6ac73))
+* prevent premature passenger display during route transitions ([fe9ea67](https://github.com/antialias/soroban-abacus-flashcards/commit/fe9ea67f56847859b4fb4fa4f747022f0a2e5a70))
+* prevent random passenger repopulation during route transitions ([db56ce8](https://github.com/antialias/soroban-abacus-flashcards/commit/db56ce89ee1d4e7583b60cde4e1d2610ee31123a))
+* prevent route celebration from immediately reappearing ([1a80934](https://github.com/antialias/soroban-abacus-flashcards/commit/1a8093416e0feff774b6cdc6dfafdbafbb8baf7f))
+* redesign matching game setup page for StandardGameLayout ([cc1f27f](https://github.com/antialias/soroban-abacus-flashcards/commit/cc1f27f0f82256f9344531814e8b965fa547d555))
+* reduce landmark size from 4.0x to 2.0x multiplier ([c928e90](https://github.com/antialias/soroban-abacus-flashcards/commit/c928e907854e18264266958d813d4e1d4c03e760))
+* regenerate lockfile with correct dependency order ([51bf448](https://github.com/antialias/soroban-abacus-flashcards/commit/51bf448c9f159152e89296d9014dde688fcf3a97))
+* regenerate lockfile with node-linker=hoisted from scratch ([480960c](https://github.com/antialias/soroban-abacus-flashcards/commit/480960c2c8e0c50fe2b6ec69a34b772751a8bf41))
+* regenerate pnpm lockfile for pnpm 9 compatibility ([4ab1aef](https://github.com/antialias/soroban-abacus-flashcards/commit/4ab1aef9b8fcf15cc03e86c829ca9885e7201b77))
+* remove double PageWithNav wrapper on matching page ([b58bcd9](https://github.com/antialias/soroban-abacus-flashcards/commit/b58bcd92ee0521a6413f4d6e9656c9ccb1c72851))
+* remove duplicate CAR_SPACING and MAX_CARS declarations ([e704a28](https://github.com/antialias/soroban-abacus-flashcards/commit/e704a28524e1217b6f56ca5a51784db73f5eadce))
+* remove duplicate previousPassengersRef declaration ([fad8636](https://github.com/antialias/soroban-abacus-flashcards/commit/fad86367638b1a48b7e1544976148f43b061c832))
+* remove frozen lockfile flag from publishing workflow to resolve dependency installation issues ([18af973](https://github.com/antialias/soroban-abacus-flashcards/commit/18af9730ffbcd822da292161815ffd09ad97f66c))
+* remove hard-coded car count from game loop ([6c90a68](https://github.com/antialias/soroban-abacus-flashcards/commit/6c90a68c49b5f7fbc262c38f9a8828f5c725cb6a))
+* remove unnecessary zIndex from question display ([db52e14](https://github.com/antialias/soroban-abacus-flashcards/commit/db52e14dfe9aceaaa1f98fc79100c04adc84611a))
+* reposition on-screen keyboard to avoid covering abacus tiles ([6e5b4ec](https://github.com/antialias/soroban-abacus-flashcards/commit/6e5b4ec7bf7e2af5f724628693d3c4ee8c5b3968))
+* require activePlayers in START_GAME, never fallback to userId ([ea1b1a2](https://github.com/antialias/soroban-abacus-flashcards/commit/ea1b1a2f69a35a6a27f7f952971509b2bb2e6f8d))
+* reset momentum and pressure when starting new route ([3ea88d7](https://github.com/antialias/soroban-abacus-flashcards/commit/3ea88d7a5a6ed427b17cf408d993918870b75f7f))
+* resolve circular dependency errors in memory quiz on-screen keyboard ([d25e2c4](https://github.com/antialias/soroban-abacus-flashcards/commit/d25e2c4c006b54a51eaa3a93fa8462e3a06221b7))
+* resolve JSX parsing error with emoji in guide page ([bf046c9](https://github.com/antialias/soroban-abacus-flashcards/commit/bf046c999b51ba422284a139ebadde2c35187ac7))
+* resolve mini navigation game name persistence across all routes ([3fa314a](https://github.com/antialias/soroban-abacus-flashcards/commit/3fa314aaa5de7b9c26a5390a52996c7d5ef9ea51))
+* resolve runtime error - calculateOptimalGrid not defined ([fbc84fe](https://github.com/antialias/soroban-abacus-flashcards/commit/fbc84febda5507d434cf60aa0fce32350e01ec96))
+* resolve SSR/client hydration mismatch for themed navigation ([301e65d](https://github.com/antialias/soroban-abacus-flashcards/commit/301e65dfa66d0de6b6efbbfbd09b717308ab57f1))
+* resolve TypeScript errors in PlayerStatusBar component ([a935e5a](https://github.com/antialias/soroban-abacus-flashcards/commit/a935e5aed8c4584d21c8fc4359453b7dec494464))
+* restore navigation to all pages using PageWithNav ([183706d](https://github.com/antialias/soroban-abacus-flashcards/commit/183706dade12080a748b0c074d0bd71fb0471d7e))
+* show "Return to Arcade" button only during active game ([4153929](https://github.com/antialias/soroban-abacus-flashcards/commit/4153929a2ab199836249d53d92c1be4979782b73))
+* smooth rail curves and deterministic track generation ([4f79c08](https://github.com/antialias/soroban-abacus-flashcards/commit/4f79c08d73c090165a1c419e7aa8ef543bc23e7e))
+* stabilize route completion threshold to prevent stuck trains ([b7233f9](https://github.com/antialias/soroban-abacus-flashcards/commit/b7233f9e4afe1dadfe29ecc4430c74074a2674fc))
+* update lockfile and fix Makefile paths ([7ba746b](https://github.com/antialias/soroban-abacus-flashcards/commit/7ba746b6bdcc4c06172e1dbacd856da9416e010a))
+* update matching game for UUID player system ([2e041dd](https://github.com/antialias/soroban-abacus-flashcards/commit/2e041ddc4443be1d032139ad9850bbc28db5c171))
+* update memory pairs game to use StandardGameLayout ([8df76c0](https://github.com/antialias/soroban-abacus-flashcards/commit/8df76c08fdf4108b88ce95de252cb8bd559fc5e4))
+* update memory quiz to use StandardGameLayout ([3f86163](https://github.com/antialias/soroban-abacus-flashcards/commit/3f86163c142e577a64adfb3bf262656d2e100ced))
+* update pnpm version to 8.15.6 to resolve ERR_INVALID_THIS error in workflow ([0b9bfed](https://github.com/antialias/soroban-abacus-flashcards/commit/0b9bfed12dfd48d9eacae69b378e28e188d3f2b1))
+* update race track components for new player system ([ae4e8fc](https://github.com/antialias/soroban-abacus-flashcards/commit/ae4e8fcb5a62c07fb9ffa9a70c07e45ca8be88c8))
+* update tutorial tests to use consolidated AbacusDisplayProvider ([899fc69](https://github.com/antialias/soroban-abacus-flashcards/commit/899fc6975f1fa14ddb42b2ead03524c9389e7c38))
+* update workflow to support Personal Access Token for GitHub Packages publishing auth ([ae4b71b](https://github.com/antialias/soroban-abacus-flashcards/commit/ae4b71b98655364887a729ef9d2b67b6a753d6e9))
+* upgrade CI dependencies and fix deprecated actions ([6a51c1e](https://github.com/antialias/soroban-abacus-flashcards/commit/6a51c1e9bdc299d86b8001eba35f930fe16cd60c))
+* use displayPassengers for station rendering in RailroadTrackPath ([a9e0d19](https://github.com/antialias/soroban-abacus-flashcards/commit/a9e0d197348377cb66581150df47d2d1127ad09a))
+* use node-linker=hoisted for full dependency hoisting ([d3b2e0b](https://github.com/antialias/soroban-abacus-flashcards/commit/d3b2e0b2e152150886110edd80dfe43f70df63d9))
+* use player IDs instead of array indices in matching game ([ccd0d6d](https://github.com/antialias/soroban-abacus-flashcards/commit/ccd0d6d94ccd1cc25eed602d32a9cf884bda2ee6))
+* use style fontSize instead of attribute for landmarks ([ebc6894](https://github.com/antialias/soroban-abacus-flashcards/commit/ebc6894746d1d490c3a5cae19c38bb86fe8fdc65))
+* use UUID player IDs in session creation fallback ([22541df](https://github.com/antialias/soroban-abacus-flashcards/commit/22541df99f049ce99e020e12c2d28b33434de51d))
+* wrap animated pressure value in animated.span to prevent React error ([5c5954b](https://github.com/antialias/soroban-abacus-flashcards/commit/5c5954be74708fb7019802a6dd80b10e9b2c1d6a))
+
+
+### Performance Improvements
+
+* optimize React rendering with memoization and consolidated effects ([93cb070](https://github.com/antialias/soroban-abacus-flashcards/commit/93cb070ca503effa05541f7ed217bb4260359581))
+
+
+### Code Refactoring
+
+* completely remove [@nav](https://github.com/nav) parallel routes and simplify navigation ([54ff20c](https://github.com/antialias/soroban-abacus-flashcards/commit/54ff20c7555e028b50471ac83a7030921c76f43b))
+* consolidate abacus display context management ([a387b03](https://github.com/antialias/soroban-abacus-flashcards/commit/a387b030fa9fe36f2c8c0e65e34ec9ee872a7afa))
+* extract ActivePlayersList component from PageWithNav ([2849576](https://github.com/antialias/soroban-abacus-flashcards/commit/28495767a9b792e6f8b9cc9f4df85e1b27a15c35))
+* extract AddPlayerButton component from PageWithNav ([57a72e3](https://github.com/antialias/soroban-abacus-flashcards/commit/57a72e34a5df198ac795ff83cb6bfc6fb8a2f27e))
+* extract FullscreenPlayerSelection component from PageWithNav ([66f5223](https://github.com/antialias/soroban-abacus-flashcards/commit/66f52234e12594947069c4ffed3648ce034c3e79))
+* extract GameContextNav orchestration component ([e3f552d](https://github.com/antialias/soroban-abacus-flashcards/commit/e3f552d8f588b25d13eca20fbcd4f43b30de917f))
+* extract GameHUD component from SteamTrainJourney ([78d5234](https://github.com/antialias/soroban-abacus-flashcards/commit/78d5234a79eb5293ae8eb279fb46b5aa2bbb6ae7))
+* extract GameModeIndicator component from PageWithNav ([d67315f](https://github.com/antialias/soroban-abacus-flashcards/commit/d67315f771a3f660be58495c1236f74b49001d23))
+* extract guide components to fix syntax error in large file ([c77e880](https://github.com/antialias/soroban-abacus-flashcards/commit/c77e880be32456c1e91d37358d85c445b2f707df))
+* extract RailroadTrackPath component from SteamTrainJourney ([d9acc0e](https://github.com/antialias/soroban-abacus-flashcards/commit/d9acc0efea397ce58013160efbb2ed4fbee244b2))
+* extract TrainAndCars component from SteamTrainJourney ([5ae22e4](https://github.com/antialias/soroban-abacus-flashcards/commit/5ae22e4645614bc67e7dece509d92bdd85250e28))
+* extract TrainTerrainBackground component from SteamTrainJourney ([05bb035](https://github.com/antialias/soroban-abacus-flashcards/commit/05bb035db5483892f101cef0971bf08575cb041b))
+* extract usePassengerAnimations hook from SteamTrainJourney ([32abde1](https://github.com/antialias/soroban-abacus-flashcards/commit/32abde107ca050bfc191a325d0bf074d53df33fc))
+* extract useTrackManagement hook from SteamTrainJourney ([a1f2b97](https://github.com/antialias/soroban-abacus-flashcards/commit/a1f2b9736a0ff087dae44110708254e6da966b79))
+* extract useTrainTransforms hook from SteamTrainJourney ([a2512d5](https://github.com/antialias/soroban-abacus-flashcards/commit/a2512d573823e187aad08f3fed365c4211023bb3))
+* make game mode a computed property from active player count ([386c88a](https://github.com/antialias/soroban-abacus-flashcards/commit/386c88a3c03eb6de7814f65a6556a2d0ab50386b))
+* remove drag-and-drop UI from EnhancedChampionArena ([982fa45](https://github.com/antialias/soroban-abacus-flashcards/commit/982fa45c08b34fdb64ec0835bc591b850e1c1373))
+* remove duplicate game control buttons from game phases ([9165014](https://github.com/antialias/soroban-abacus-flashcards/commit/9165014997ccf6f4859646709d7e800933b4868e))
+* remove redundant game titles from game screens ([402724c](https://github.com/antialias/soroban-abacus-flashcards/commit/402724c80e1776b90be1fc02186813389560f380))
+* replace bulky MemoryGrid stats with compact progress display ([c4d6691](https://github.com/antialias/soroban-abacus-flashcards/commit/c4d6691715d09066661be4a0af7e917c6217ed8c))
+* simplify navigation flow and enhance GameControls UI ([920aaa6](https://github.com/antialias/soroban-abacus-flashcards/commit/920aaa639887b42dcb225cb42ce146e67d29a98e))
+* simplify PageWithNav by extracting nav components ([98cfa56](https://github.com/antialias/soroban-abacus-flashcards/commit/98cfa5645bc21faaeffa676d205bdbdf604eb488))
+* split deployment info into server/client components ([5e7b273](https://github.com/antialias/soroban-abacus-flashcards/commit/5e7b273b339cd11d7b4b55dd50a1bf6c823b41d5))
+* streamline GamePhase header and integrate PlayerStatusBar ([dcefa74](https://github.com/antialias/soroban-abacus-flashcards/commit/dcefa74902c65618f79eda32c94a5b8736b15b55))
+* streamline UI and remove duplicate information displays ([7a3e34b](https://github.com/antialias/soroban-abacus-flashcards/commit/7a3e34b4faab62c069e6698a935ad66ee80037d2))
+
+
+### Documentation
+
+* add comprehensive workflow documentation for automated npm publishing ([f923b53](https://github.com/antialias/soroban-abacus-flashcards/commit/f923b53a44c2875fe152c9bd326d6a427d07a71e))
+* add server persistence migration plan ([dd0df8c](https://github.com/antialias/soroban-abacus-flashcards/commit/dd0df8c274f513947e43f014b9086f77077f0196))
+
+
+### Tests
+
+* add comprehensive unit tests for refactored hooks and components ([5d20839](https://github.com/antialias/soroban-abacus-flashcards/commit/5d2083903e9eb751d810921e06dc51b7137f726f))
+* add E2E tests for arcade modal session behavior ([619be98](https://github.com/antialias/soroban-abacus-flashcards/commit/619be9859c548b6c3f0af45379a61f690bcb8e13))
+
 ## [1.2.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v1.2.0...v1.2.1) (2025-09-28)
 
 

Dockerfile

@@ -1,8 +1,11 @@
 # Multi-stage build for Soroban Abacus Flashcards
 FROM node:18-alpine AS base
 
+# Install Python and build tools for better-sqlite3
+RUN apk add --no-cache python3 py3-setuptools make g++
+
 # Install pnpm and turbo
-RUN npm install -g pnpm@8.0.0 turbo@1.10.0
+RUN npm install -g pnpm@9.15.4 turbo@1.10.0
 
 WORKDIR /app
 
@@ -14,7 +17,7 @@ COPY packages/core/client/typescript/package.json ./packages/core/client/typescr
 COPY packages/abacus-react/package.json ./packages/abacus-react/
 COPY packages/templates/package.json ./packages/templates/
 
-# Install dependencies
+# Install dependencies (will use .npmrc with hoisted mode)
 RUN pnpm install --frozen-lockfile
 
 # Builder stage
@@ -31,20 +34,44 @@ RUN turbo build --filter=@soroban/web
 FROM node:18-alpine AS runner
 WORKDIR /app
 
+# Install Python and build tools for better-sqlite3 (needed at runtime)
+RUN apk add --no-cache python3 py3-setuptools make g++
+
 # Create non-root user
 RUN addgroup --system --gid 1001 nodejs
 RUN adduser --system --uid 1001 nextjs
 
-# Copy built application
-COPY --from=builder --chown=nextjs:nodejs /app/apps/web/.next/standalone ./
-COPY --from=builder --chown=nextjs:nodejs /app/apps/web/.next/static ./apps/web/.next/static
+# Copy built Next.js application
+COPY --from=builder --chown=nextjs:nodejs /app/apps/web/.next ./apps/web/.next
 COPY --from=builder --chown=nextjs:nodejs /app/apps/web/public ./apps/web/public
 
+# Copy server files (compiled from TypeScript)
+COPY --from=builder --chown=nextjs:nodejs /app/apps/web/server.js ./apps/web/
+COPY --from=builder --chown=nextjs:nodejs /app/apps/web/socket-server.js ./apps/web/
+COPY --from=builder --chown=nextjs:nodejs /app/apps/web/src ./apps/web/src
+
+# Copy database migrations
+COPY --from=builder --chown=nextjs:nodejs /app/apps/web/drizzle ./apps/web/drizzle
+
+# Copy node_modules (for dependencies)
+COPY --from=builder --chown=nextjs:nodejs /app/node_modules ./node_modules
+COPY --from=builder --chown=nextjs:nodejs /app/apps/web/node_modules ./apps/web/node_modules
+
+# Copy package.json files for module resolution
+COPY --from=builder --chown=nextjs:nodejs /app/package.json ./
+COPY --from=builder --chown=nextjs:nodejs /app/apps/web/package.json ./apps/web/
+
 # Set up environment
+WORKDIR /app/apps/web
+
+# Create data directory for SQLite database
+RUN mkdir -p data && chown nextjs:nodejs data
+
 USER nextjs
 EXPOSE 3000
 ENV PORT 3000
 ENV HOSTNAME "0.0.0.0"
+ENV NODE_ENV production
 
 # Start the application
-CMD ["node", "apps/web/server.js"]
+CMD ["node", "server.js"]

Makefile

@@ -19,7 +19,7 @@ install:
 # Generate default flashcards
 out/flashcards.pdf: check-deps
 	@mkdir -p out
-	python3 src/generate.py --config config/default.yaml --output out/flashcards.pdf
+	python3 packages/core/src/generate.py --config config/default.yaml --output out/flashcards.pdf
 
 # Generate linearized version
 out/flashcards_linear.pdf: out/flashcards.pdf
@@ -29,23 +29,23 @@ out/flashcards_linear.pdf: out/flashcards.pdf
 samples: check-deps
 	@echo "Generating sample outputs..."
 	@mkdir -p out/samples
-	python3 src/generate.py --config config/default.yaml --output out/samples/default.pdf
-	python3 src/generate.py --config config/0-99.yaml --output out/samples/0-99.pdf
-	python3 src/generate.py --config config/3-column-fixed.yaml --output out/samples/3-column-fixed.pdf
-	python3 src/generate.py --range "1,2,5,10,20,50,100" --cards-per-page 8 --output out/samples/custom-list.pdf
+	python3 packages/core/src/generate.py --config config/default.yaml --output out/samples/default.pdf
+	python3 packages/core/src/generate.py --config config/0-99.yaml --output out/samples/0-99.pdf
+	python3 packages/core/src/generate.py --config config/3-column-fixed.yaml --output out/samples/3-column-fixed.pdf
+	python3 packages/core/src/generate.py --range "1,2,5,10,20,50,100" --cards-per-page 8 --output out/samples/custom-list.pdf
 	@echo "Sample PDFs generated in out/samples/"
 
 # Quick test with small range
 test: check-deps
 	@echo "Running quick test..."
-	python3 src/generate.py --range "0-9" --output out/test.pdf
+	python3 packages/core/src/generate.py --range "0-9" --output out/test.pdf
 	@command -v qpdf >/dev/null 2>&1 && qpdf --check out/test.pdf || echo "PDF generated (validation skipped)"
 	@echo "Test completed successfully"
 
 # Generate README example images
 examples: check-deps
 	@echo "Generating example images for README..."
-	@python3 src/generate_examples.py
+	@python3 packages/core/src/generate_examples.py
 	@echo "✓ Example images generated in docs/images/"
 
 # Verify examples are up to date (for CI)

README.md

@@ -773,4 +773,16 @@ make verify-examples
 
 MIT License - see LICENSE file for details.
 
-This project uses DejaVu Sans font (included), which is released under a free license.
+This project uses DejaVu Sans font (included), which is released under a free license.
+---
+
+## 🚀 Active Development Projects
+
+### Speed Complement Race Port (In Progress)
+**Status**: Planning Complete, Ready to Implement  
+**Plan Document**: [`apps/web/COMPLEMENT_RACE_PORT_PLAN.md`](./apps/web/COMPLEMENT_RACE_PORT_PLAN.md)  
+**Source**: `packages/core/src/web_generator.py` (lines 10956-15113)  
+**Target**: `apps/web/src/app/games/complement-race/`  
+
+A comprehensive port of the sophisticated Speed Complement Race game from standalone HTML to Next.js. Features 3 game modes, 2 AI personalities with 82 unique commentary messages, adaptive difficulty, and multiple visualization systems.
+

apps/web/.claude/ARCADE_ARCHITECTURE.md

@@ -0,0 +1,492 @@
+# Arcade Game Architecture
+
+## Overview
+
+The arcade system supports two distinct game modes that must remain completely isolated from each other:
+
+1. **Local Play** - Games without network synchronization (can be single-player OR local multiplayer)
+2. **Room-Based Play** - Networked games with real-time synchronization across room members
+
+## Core Terminology
+
+Following `docs/terminology-user-player-room.md`:
+
+- **USER** - Identity (guest or authenticated account), retrieved via `useViewerId()`, one per browser/account
+- **PLAYER** - Game avatar/profile (e.g., "Alice 👧", "Bob 👦"), stored in `players` table
+- **PLAYER ROSTER** - All PLAYERS belonging to a USER (can have many)
+- **ACTIVE PLAYERS** - PLAYERS where `isActive = true` - these are the ones that actually participate in games
+- **ROOM MEMBER** - A USER's participation in a multiplayer room (tracked in `room_members` table)
+
+**Important:** A USER can have many PLAYERS in their roster, but only the ACTIVE PLAYERS (where `isActive = true`) participate in games. This enables "hot-potato" style local multiplayer where multiple people share the same device. This is LOCAL play (not networked), even though multiple PLAYERS participate.
+
+In arcade sessions:
+- `arcade_sessions.userId` - The USER who owns the session
+- `arcade_sessions.activePlayers` - Array of PLAYER IDs (only active players with `isActive = true`)
+- `arcade_sessions.roomId` - If present, the room ID for networked play (references `arcade_rooms.id`)
+
+## Critical Architectural Requirements
+
+### 1. Mode Isolation (MUST ENFORCE)
+
+**Local Play** (`/arcade/[game-name]`)
+- MUST NOT sync game state across the network
+- MUST NOT use room data, even if the USER is currently a member of an active room
+- MUST create isolated, per-USER game sessions
+- Game state lives only in the current browser tab/session
+- CAN have multiple ACTIVE PLAYERS from the same USER (local multiplayer / hot-potato)
+- State is NOT shared across the network, only within the browser session
+
+**Room-Based Play** (`/arcade/room`)
+- MUST sync game state across all room members via network
+- MUST use the USER's current active room
+- MUST coordinate moves via server WebSocket
+- Game state is shared across all ACTIVE PLAYERS from all USERS in the room
+- When a PLAYER makes a move, all room members see it in real-time
+- CAN ALSO have multiple ACTIVE PLAYERS per USER (networked + local multiplayer combined)
+
+### 2. Room ID Usage Rules
+
+```typescript
+// ❌ WRONG: Always checking for room data
+const { roomData } = useRoomData()
+useArcadeSession({ roomId: roomData?.id })  // This causes the bug!
+
+// ✅ CORRECT: Explicit mode control via separate providers
+<LocalMemoryPairsProvider>     {/* Never passes roomId */}
+<RoomMemoryPairsProvider>       {/* Always passes roomId */}
+```
+
+**Key principle:** The presence of a `roomId` parameter in `useArcadeSession` determines synchronization behavior:
+- `roomId` present → room-wide network sync enabled (room-based play)
+- `roomId` undefined → local play only (no network sync)
+
+### 3. Composition Over Flags (PREFERRED APPROACH)
+
+**✅ Option 1: Separate Providers (CLEAREST - USE THIS)**
+
+Create two distinct provider components:
+
+```typescript
+// context/LocalMemoryPairsProvider.tsx
+export function LocalMemoryPairsProvider({ children }) {
+  const { data: viewerId } = useViewerId()
+  const { activePlayers } = useGameMode()  // Gets active players (isActive = true)
+  // NEVER fetch room data for local play
+
+  const { state, sendMove } = useArcadeSession<MemoryPairsState>({
+    userId: viewerId || '',
+    roomId: undefined,  // Explicitly undefined - no network sync
+    initialState,
+    applyMove: applyMoveOptimistically,
+  })
+
+  // ... rest of provider logic
+  // Note: activePlayers contains only PLAYERS with isActive = true
+}
+
+// context/RoomMemoryPairsProvider.tsx
+export function RoomMemoryPairsProvider({ children }) {
+  const { data: viewerId } = useViewerId()
+  const { roomData } = useRoomData()  // OK to fetch for room-based play
+  const { activePlayers } = useGameMode()  // Gets active players (isActive = true)
+
+  const { state, sendMove } = useArcadeSession<MemoryPairsState>({
+    userId: viewerId || '',
+    roomId: roomData?.id,  // Pass roomId for network sync
+    initialState,
+    applyMove: applyMoveOptimistically,
+  })
+
+  // ... rest of provider logic
+}
+```
+
+Then use them explicitly:
+```typescript
+// /arcade/matching/page.tsx (Local Play)
+export default function MatchingPage() {
+  return (
+    <ArcadeGuardedPage>
+      <LocalMemoryPairsProvider>
+        <MemoryPairsGame />
+      </LocalMemoryPairsProvider>
+    </ArcadeGuardedPage>
+  )
+}
+
+// /arcade/room/page.tsx (Room-Based Play)
+export default function RoomPage() {
+  // ... room validation logic
+  if (roomData.gameName === 'matching') {
+    return (
+      <RoomMemoryPairsProvider>
+        <MemoryPairsGame />
+      </RoomMemoryPairsProvider>
+    )
+  }
+}
+```
+
+**Benefits of separate providers:**
+- Compile-time safety - impossible to mix modes
+- Clear intent - any developer can see which mode at a glance
+- No runtime conditionals needed
+- Easier to test - each provider tests separately
+
+**❌ Avoid:** Runtime flag checking scattered throughout code
+```typescript
+// Anti-pattern: Too many conditionals
+if (isRoomBased) { ... } else { ... }
+```
+
+### 4. How Synchronization Works
+
+#### Local Play Flow
+```
+USER Action → useArcadeSession (roomId: undefined)
+           → WebSocket emit('join-arcade-session', { userId })
+           → Server creates isolated session for userId
+           → Session key = userId
+           → session.activePlayers = USER's active player IDs (isActive = true)
+           → State changes only affect this USER's browser tabs
+
+Note: Multiple ACTIVE PLAYERS from same USER can participate (local multiplayer),
+      but state is NEVER synced across network
+```
+
+#### Room-Based Play Flow
+```
+USER Action (on behalf of PLAYER)
+         → useArcadeSession (roomId: 'room_xyz')
+         → WebSocket emit('join-arcade-session', { userId, roomId })
+         → Server creates/joins shared session for roomId
+         → session.activePlayers = ALL active players from ALL room members
+         → Socket joins TWO rooms: `arcade:${userId}` AND `game:${roomId}`
+         → PLAYER makes move
+         → Server validates PLAYER ownership (is this PLAYER owned by this USER?)
+         → State changes broadcast to:
+            - arcade:${userId} - All tabs of this USER (for optimistic reconciliation)
+            - game:${roomId} - All USERS in the room (for network sync)
+
+Note: Each USER can still have multiple ACTIVE PLAYERS (local + networked multiplayer)
+```
+
+The server-side logic uses `roomId` to determine session scope:
+- No `roomId`: Session key = `userId` (isolated to USER's browser)
+- With `roomId`: Session key = `roomId` (shared across all room members)
+
+See `docs/MULTIPLAYER_SYNC_ARCHITECTURE.md` for detailed socket room mechanics.
+
+### 5. USER vs PLAYER in Game Logic
+
+**Important distinction:**
+- **Session ownership**: Tracked by USER ID (`useViewerId()`)
+- **Player roster**: All PLAYERS for a USER (can be many)
+- **Active players**: PLAYERS with `isActive = true` (these join the game)
+- **Game actions**: Performed by PLAYER ID (from `players` table)
+- **Move validation**: Server checks that PLAYER ID belongs to the requesting USER
+- **Local multiplayer**: One USER with multiple ACTIVE PLAYERS (hot-potato style, same device)
+- **Networked multiplayer**: Multiple USERS, each with their own ACTIVE PLAYERS, in a room
+
+```typescript
+// ✅ Correct: USER owns session, ACTIVE PLAYERS participate
+const { data: viewerId } = useViewerId()  // USER ID
+const { activePlayers } = useGameMode()   // ACTIVE PLAYER IDs (isActive = true)
+
+// activePlayers might be [player_001, player_002]
+// even though USER has 5 total PLAYERS in their roster
+
+const { state, sendMove } = useArcadeSession({
+  userId: viewerId,  // Session owned by USER
+  roomId: undefined, // Local play (or roomData?.id for room-based)
+  // ...
+})
+
+// When PLAYER flips card:
+sendMove({
+  type: 'FLIP_CARD',
+  playerId: currentPlayerId,  // PLAYER ID from activePlayers
+  data: { cardId: '...' }
+})
+```
+
+**Example Scenarios:**
+
+1. **Single-player local game:**
+   - USER: "guest_abc"
+   - Player roster: ["player_001" (active), "player_002" (inactive), "player_003" (inactive)]
+   - Active PLAYERS in game: ["player_001"]
+   - Mode: Local play (no roomId)
+
+2. **Local multiplayer (hot-potato):**
+   - USER: "guest_abc"
+   - Player roster: ["player_001" (active), "player_002" (active), "player_003" (active), "player_004" (inactive)]
+   - Active PLAYERS in game: ["player_001", "player_002", "player_003"] (3 kids sharing device)
+   - Mode: Local play (no roomId)
+   - Game rotates turns between the 3 active PLAYERS, but NO network sync
+
+3. **Room-based networked play:**
+   - USER A: "guest_abc"
+     - Player roster: 5 total PLAYERS
+     - Active PLAYERS: ["player_001", "player_002"]
+   - USER B: "guest_def"
+     - Player roster: 3 total PLAYERS
+     - Active PLAYERS: ["player_003"]
+   - Mode: Room-based play (roomId: "room_xyz")
+   - Total PLAYERS in game: 3 (player_001, player_002, player_003)
+   - All 3 synced across network
+
+4. **Room-based + local multiplayer combined:**
+   - USER A: "guest_abc" with 3 active PLAYERS (3 kids at Device A)
+   - USER B: "guest_def" with 2 active PLAYERS (2 kids at Device B)
+   - Mode: Room-based play (roomId: "room_xyz")
+   - 5 total active PLAYERS across 2 devices, all synced over network
+
+## Common Mistakes to Avoid
+
+### Mistake 1: Conditional Room Usage
+```typescript
+// ❌ BAD: Room sync leaks into local play
+const { roomData } = useRoomData()
+useArcadeSession({
+  roomId: roomData?.id  // Local play will sync if USER is in a room!
+})
+```
+
+### Mistake 2: Shared Components Without Mode Context
+```typescript
+// ❌ BAD: Same provider used for both modes
+export default function LocalGamePage() {
+  return <GameProvider><Game /></GameProvider>  // Which mode?
+}
+```
+
+### Mistake 3: Confusing "multiplayer" with "networked"
+```typescript
+// ❌ BAD: Thinking multiple PLAYERS means room-based
+if (activePlayers.length > 1) {
+  // Must be room-based!  WRONG!
+  // Could be local multiplayer (hot-potato style)
+}
+
+// ✅ CORRECT: Check for roomId to determine network sync
+const isNetworked = !!roomId
+const isLocalMultiplayer = activePlayers.length > 1 && !roomId
+```
+
+### Mistake 4: Using all PLAYERS instead of only active ones
+```typescript
+// ❌ BAD: Including inactive players
+const allPlayers = await db.query.players.findMany({
+  where: eq(players.userId, userId)
+})
+
+// ✅ CORRECT: Only active players join the game
+const activePlayers = await db.query.players.findMany({
+  where: and(
+    eq(players.userId, userId),
+    eq(players.isActive, true)
+  )
+})
+```
+
+### Mistake 5: Mixing USER ID and PLAYER ID
+```typescript
+// ❌ BAD: Using USER ID for game actions
+sendMove({
+  type: 'FLIP_CARD',
+  playerId: viewerId,  // WRONG! viewerId is USER ID, not PLAYER ID
+  data: { cardId: '...' }
+})
+
+// ✅ CORRECT: Use PLAYER ID from game state
+sendMove({
+  type: 'FLIP_CARD',
+  playerId: state.currentPlayer,  // PLAYER ID from activePlayers
+  data: { cardId: '...' }
+})
+```
+
+### Mistake 6: Server-Side Ambiguity
+```typescript
+// ❌ BAD: Server can't distinguish intent
+socket.on('join-arcade-session', ({ userId, roomId }) => {
+  // If roomId exists, did USER want local or room-based play?
+  // This happens when provider always passes roomData?.id
+})
+```
+
+## Testing Requirements
+
+Tests MUST verify mode isolation:
+
+### Local Play Tests
+```typescript
+it('should NOT sync state when USER is in a room but playing locally', async () => {
+  // Setup: USER is a member of an active room
+  // Action: USER navigates to /arcade/matching
+  // Assert: Game state is NOT shared with other room members
+  // Assert: Other room members' actions do NOT affect this game
+})
+
+it('should create isolated sessions for concurrent local games', () => {
+  // Setup: Two USERS who are members of the same room
+  // Action: Both navigate to /arcade/matching separately
+  // Assert: Each has independent game state
+  // Assert: USER A's moves do NOT appear in USER B's game
+})
+
+it('should support local multiplayer without network sync', () => {
+  // Setup: USER with 3 active PLAYERS in roster (hot-potato style)
+  // Action: USER plays at /arcade/matching with the 3 active PLAYERS
+  // Assert: All 3 active PLAYERS participate in the same session
+  // Assert: Inactive PLAYERS do NOT participate
+  // Assert: State is NOT synced across network
+  // Assert: Game rotates turns between active PLAYERS locally
+})
+
+it('should only include active players in game', () => {
+  // Setup: USER has 5 PLAYERS in roster, but only 2 are active
+  // Action: USER starts a local game
+  // Assert: Only the 2 active PLAYERS are in activePlayers array
+  // Assert: Inactive PLAYERS are not included
+})
+
+it('should sync across USER tabs but not across network', () => {
+  // Setup: USER opens /arcade/matching in 2 browser tabs
+  // Action: PLAYER makes move in Tab 1
+  // Assert: Tab 2 sees the move (multi-tab sync)
+  // Assert: Other USERS do NOT see the move (no network sync)
+})
+```
+
+### Room-Based Play Tests
+```typescript
+it('should sync state across all room members', async () => {
+  // Setup: Two USERS are members of the same room
+  // Action: USER A's PLAYER flips card at /arcade/room
+  // Assert: USER B sees the card flip in real-time
+})
+
+it('should sync across multiple active PLAYERS from multiple USERS', () => {
+  // Setup: USER A has 2 active PLAYERS, USER B has 1 active PLAYER in same room
+  // Action: USER A's PLAYER 1 makes move
+  // Assert: All 3 PLAYERS see the move (networked)
+})
+
+it('should only include active players in room games', () => {
+  // Setup: USER A (5 PLAYERS, 2 active), USER B (3 PLAYERS, 1 active) join room
+  // Action: Game starts
+  // Assert: session.activePlayers = [userA_player1, userA_player2, userB_player1]
+  // Assert: Inactive PLAYERS are NOT included
+})
+
+it('should handle combined local + networked multiplayer', () => {
+  // Setup: USER A (3 active PLAYERS), USER B (2 active PLAYERS) in same room
+  // Action: Any PLAYER makes a move
+  // Assert: All 5 active PLAYERS see the move across both devices
+})
+
+it('should fail gracefully when no room exists', () => {
+  // Setup: USER is not a member of any room
+  // Action: Navigate to /arcade/room
+  // Assert: Shows "No active room" message
+  // Assert: Does not create a session
+})
+
+it('should validate PLAYER ownership', async () => {
+  // Setup: USER A in room with active PLAYER 'alice'
+  // Action: USER A attempts move for PLAYER 'bob' (owned by USER B)
+  // Assert: Server rejects the move
+  // Assert: Error indicates unauthorized PLAYER
+})
+```
+
+## Implementation Checklist
+
+When adding a new game or modifying existing ones:
+
+- [ ] Create separate `LocalGameProvider` and `RoomGameProvider` components
+- [ ] Local provider never calls `useRoomData()`
+- [ ] Local provider passes `roomId: undefined` to `useArcadeSession`
+- [ ] Room provider calls `useRoomData()` and passes `roomId: roomData?.id`
+- [ ] Both providers use `useGameMode()` to get active players
+- [ ] Local play page uses `LocalGameProvider`
+- [ ] `/arcade/room` page uses `RoomGameProvider`
+- [ ] Game components correctly use PLAYER IDs (not USER IDs) for moves
+- [ ] Game supports multiple active PLAYERS from same USER (local multiplayer)
+- [ ] Inactive PLAYERS are never included in game sessions
+- [ ] Tests verify mode isolation (local doesn't network sync, room-based does)
+- [ ] Tests verify PLAYER ownership validation
+- [ ] Tests verify only active PLAYERS participate
+- [ ] Tests verify local multiplayer works (multiple active PLAYERS, one USER)
+- [ ] Documentation updated if behavior changes
+
+## File Organization
+
+```
+src/app/arcade/
+├── [game-name]/                    # Local play games
+│   ├── page.tsx                   # Uses LocalGameProvider
+│   └── context/
+│       ├── LocalGameProvider.tsx  # roomId: undefined
+│       └── RoomGameProvider.tsx   # roomId: roomData?.id
+├── room/                           # Room-based play
+│   └── page.tsx                   # Uses RoomGameProvider
+└── ...
+```
+
+## Architecture Decision Records
+
+### Why separate providers instead of auto-detect from route?
+
+While we could detect mode based on the route (`/arcade/room` vs `/arcade/matching`), separate providers are clearer and prevent accidental misuse. Future developers can immediately see the intent, and the type system can enforce correctness.
+
+### Why being in a room doesn't mean all games sync?
+
+A USER being a room member does NOT mean all their games should network sync. They should be able to play local games while remaining in a room for future room-based sessions. Mode is determined by the page they're on, not their room membership status.
+
+### Why not use a single shared provider with mode props?
+
+We tried that. It led to the current bug where local play accidentally synced with rooms. Separate providers make the distinction compile-time safe rather than runtime conditional, and eliminate the possibility of accidentally passing `roomId` when we shouldn't.
+
+### Why do we track sessions by USER but moves by PLAYER?
+
+- **Sessions** are per-USER because each USER can have their own game session
+- **Moves** are per-PLAYER because PLAYERS are the game avatars that score points
+- **Only active PLAYERS** (isActive = true) participate in games
+- This allows:
+  - One USER with multiple active PLAYERS (local multiplayer / hot-potato)
+  - Multiple USERS in one room (networked play)
+  - Combined: Multiple USERS each with multiple active PLAYERS (local + networked)
+  - Proper ownership validation (server checks USER owns PLAYER)
+  - PLAYERS can be toggled active/inactive without deleting them
+
+### Why use "local" vs "room-based" instead of "solo" vs "multiplayer"?
+
+- **"Solo"** is misleading - a USER can have multiple active PLAYERS in local play (hot-potato style)
+- **"Multiplayer"** is ambiguous - it could mean local multiplayer OR networked multiplayer
+- **"Local play"** clearly means: no network sync (but can have multiple active PLAYERS)
+- **"Room-based play"** clearly means: network sync across room members
+
+## Related Files
+
+- `src/hooks/useArcadeSession.ts` - Session management with optional roomId
+- `src/hooks/useArcadeSocket.ts` - WebSocket connection with sync logic (socket rooms: `arcade:${userId}` and `game:${roomId}`)
+- `src/hooks/useRoomData.ts` - Fetches USER's current room membership
+- `src/hooks/useViewerId.ts` - Retrieves current USER ID
+- `src/contexts/GameModeContext.tsx` - Provides active PLAYER information
+- `src/app/arcade/matching/context/ArcadeMemoryPairsContext.tsx` - Game context (needs refactoring to separate providers)
+- `src/app/arcade/matching/page.tsx` - Local play entry point
+- `src/app/arcade/room/page.tsx` - Room-based play entry point
+- `docs/terminology-user-player-room.md` - Terminology guide (USER/PLAYER/MEMBER)
+- `docs/MULTIPLAYER_SYNC_ARCHITECTURE.md` - Technical details of room-based sync
+
+## Version History
+
+- **2025-10-09**: Initial documentation
+  - Issue identified: Local play was syncing with rooms over network
+  - Root cause: Same provider always fetched `roomData` and passed `roomId` to `useArcadeSession`
+  - Solution: Separate providers for local vs room-based play
+  - Terminology clarification: "local" vs "room-based" (not "solo" vs "multiplayer")
+  - Active players: Only PLAYERS with `isActive = true` participate in games

apps/web/.claude/ARCADE_SETUP_PATTERN.md

@@ -0,0 +1,416 @@
+# Arcade Setup Pattern
+
+## Overview
+
+This document describes the **standard synchronized setup pattern** for arcade games. Following this pattern ensures that:
+
+1. ✅ **Setup is synchronized** - All room members see the same setup screen and config changes in real-time
+2. ✅ **No local state hacks** - Configuration lives entirely in session state, no React state merging
+3. ✅ **Optimistic updates** - Config changes feel instant with client-side prediction
+4. ✅ **Consistent pattern** - All games follow the same architecture
+
+**Reference Implementation**: `src/app/arcade/matching/*` (Matching game)
+
+---
+
+## Core Concept
+
+Setup configuration is **game state**, not UI state. Configuration changes are **moves** that are validated, synchronized, and can be made by any room member.
+
+### Key Principles
+
+1. **Game state includes configuration** during ALL phases (setup, playing, results)
+2. **No local React state** for configuration - use session state directly
+3. **Standard move types** that all games should implement
+4. **Setup phase is collaborative** - any room member can configure the game
+
+---
+
+## Required Move Types
+
+Every arcade game must support these standard moves:
+
+### 1. `GO_TO_SETUP`
+
+Transitions game to setup phase, allowing reconfiguration.
+
+```typescript
+{
+  type: 'GO_TO_SETUP',
+  playerId: string,
+  data: {}
+}
+```
+
+**Behavior:**
+- Can be called from any phase (setup, playing, results)
+- Sets `gamePhase: 'setup'`
+- Resets game progression (scores, cards, etc.)
+- Preserves configuration (players can modify it)
+- Synchronized across all room members
+
+### 2. `SET_CONFIG`
+
+Updates a configuration field during setup phase.
+
+```typescript
+{
+  type: 'SET_CONFIG',
+  playerId: string,
+  data: {
+    field: string,  // Config field name
+    value: any      // New value
+  }
+}
+```
+
+**Behavior:**
+- Only allowed during setup phase
+- Validates field name and value
+- Updates immediately with optimistic update
+- Synchronized across all room members
+
+### 3. `START_GAME`
+
+Starts the game with current configuration.
+
+```typescript
+{
+  type: 'START_GAME',
+  playerId: string,
+  data: {
+    activePlayers: string[],
+    playerMetadata: { [playerId: string]: PlayerMetadata },
+    // ... game-specific initial data
+  }
+}
+```
+
+**Behavior:**
+- Only allowed during setup phase
+- Uses current session state configuration
+- Initializes game-specific state
+- Sets `gamePhase: 'playing'`
+
+---
+
+## Implementation Checklist
+
+### 1. Update Validation Types
+
+Add move types to your game's validation types:
+
+```typescript
+// src/lib/arcade/validation/types.ts
+
+export interface YourGameGoToSetupMove extends GameMove {
+  type: 'GO_TO_SETUP'
+  data: Record<string, never>
+}
+
+export interface YourGameSetConfigMove extends GameMove {
+  type: 'SET_CONFIG'
+  data: {
+    field: 'configField1' | 'configField2' | 'configField3'
+    value: any
+  }
+}
+
+export type YourGameMove =
+  | YourGameStartGameMove
+  | YourGameGoToSetupMove
+  | YourGameSetConfigMove
+  | ... // other game-specific moves
+```
+
+### 2. Implement Validators
+
+Add validators for setup moves in your game's validator class:
+
+```typescript
+// src/lib/arcade/validation/YourGameValidator.ts
+
+export class YourGameValidator implements GameValidator<YourGameState, YourGameMove> {
+  validateMove(state, move, context) {
+    switch (move.type) {
+      case 'GO_TO_SETUP':
+        return this.validateGoToSetup(state)
+
+      case 'SET_CONFIG':
+        return this.validateSetConfig(state, move.data.field, move.data.value)
+
+      case 'START_GAME':
+        return this.validateStartGame(state, move.data)
+
+      // ... other moves
+    }
+  }
+
+  private validateGoToSetup(state: YourGameState): ValidationResult {
+    return {
+      valid: true,
+      newState: {
+        ...state,
+        gamePhase: 'setup',
+        // Reset game progression, preserve configuration
+        // ... reset scores, game data, etc.
+      },
+    }
+  }
+
+  private validateSetConfig(
+    state: YourGameState,
+    field: string,
+    value: any
+  ): ValidationResult {
+    // Only during setup
+    if (state.gamePhase !== 'setup') {
+      return { valid: false, error: 'Cannot change config outside setup' }
+    }
+
+    // Validate field-specific values
+    switch (field) {
+      case 'configField1':
+        if (!isValidValue(value)) {
+          return { valid: false, error: 'Invalid value' }
+        }
+        break
+      // ... validate other fields
+    }
+
+    return {
+      valid: true,
+      newState: { ...state, [field]: value },
+    }
+  }
+
+  private validateStartGame(state: YourGameState, data: any): ValidationResult {
+    if (state.gamePhase !== 'setup') {
+      return { valid: false, error: 'Can only start from setup' }
+    }
+
+    // Use current state configuration to initialize game
+    const initialGameData = initializeYourGame(state.configField1, state.configField2)
+
+    return {
+      valid: true,
+      newState: {
+        ...state,
+        gamePhase: 'playing',
+        ...initialGameData,
+      },
+    }
+  }
+}
+```
+
+### 3. Add Optimistic Updates
+
+Update `applyMoveOptimistically` in your providers:
+
+```typescript
+// src/app/arcade/your-game/context/YourGameProvider.tsx
+
+function applyMoveOptimistically(state: YourGameState, move: GameMove): YourGameState {
+  switch (move.type) {
+    case 'GO_TO_SETUP':
+      return {
+        ...state,
+        gamePhase: 'setup',
+        // Reset game state, preserve config
+      }
+
+    case 'SET_CONFIG':
+      const { field, value } = move.data
+      return {
+        ...state,
+        [field]: value,
+      }
+
+    case 'START_GAME':
+      return {
+        ...state,
+        gamePhase: 'playing',
+        // ... initialize game data from move
+      }
+
+    // ... other moves
+  }
+}
+```
+
+### 4. Remove Local State from Providers
+
+**❌ OLD PATTERN (Don't do this):**
+
+```typescript
+// DON'T: Local React state for configuration
+const [localDifficulty, setLocalDifficulty] = useState(6)
+
+// DON'T: Merge hack
+const effectiveState = state.gamePhase === 'setup'
+  ? { ...state, difficulty: localDifficulty }
+  : state
+
+// DON'T: Direct setter
+const setDifficulty = (value) => setLocalDifficulty(value)
+```
+
+**✅ NEW PATTERN (Do this):**
+
+```typescript
+// DO: Use session state directly
+const { state, sendMove } = useArcadeSession(...)
+
+// DO: Send move for config changes
+const setDifficulty = useCallback((value) => {
+  const playerId = activePlayers[0] || ''
+  sendMove({
+    type: 'SET_CONFIG',
+    playerId,
+    data: { field: 'difficulty', value },
+  })
+}, [activePlayers, sendMove])
+
+// DO: Use state directly (no merging!)
+const contextValue = { state: { ...state, gameMode }, ... }
+```
+
+### 5. Update Action Creators
+
+All configuration actions should send moves:
+
+```typescript
+export function YourGameProvider({ children }) {
+  const { state, sendMove } = useArcadeSession(...)
+
+  const setConfigField = useCallback((value) => {
+    const playerId = activePlayers[0] || ''
+    sendMove({
+      type: 'SET_CONFIG',
+      playerId,
+      data: { field: 'configField', value },
+    })
+  }, [activePlayers, sendMove])
+
+  const goToSetup = useCallback(() => {
+    const playerId = activePlayers[0] || state.currentPlayer || ''
+    sendMove({
+      type: 'GO_TO_SETUP',
+      playerId,
+      data: {},
+    })
+  }, [activePlayers, state.currentPlayer, sendMove])
+
+  const startGame = useCallback(() => {
+    // Use current session state config (not local state!)
+    const initialData = initializeGame(state.config1, state.config2)
+
+    const playerId = activePlayers[0]
+    sendMove({
+      type: 'START_GAME',
+      playerId,
+      data: {
+        ...initialData,
+        activePlayers,
+        playerMetadata: capturePlayerMetadata(players, activePlayers),
+      },
+    })
+  }, [state.config1, state.config2, activePlayers, sendMove])
+
+  return <YourGameContext.Provider value={...} />
+}
+```
+
+---
+
+## Benefits of This Pattern
+
+### 1. **Synchronized Setup**
+- User A clicks "Setup" → All room members see setup screen
+- User B changes difficulty → All room members see the change
+- User A clicks "Start" → All room members start playing
+
+### 2. **No Special Cases**
+- Setup works like gameplay (moves + validation)
+- No conditional logic based on phase
+- No React state merging hacks
+
+### 3. **Easy to Extend**
+- New games copy the same pattern
+- Well-documented and tested
+- Consistent developer experience
+
+### 4. **Optimistic Updates**
+- Config changes feel instant
+- Client-side prediction + server validation
+- Rollback on validation failure
+
+---
+
+## Testing Checklist
+
+When implementing this pattern, test these scenarios:
+
+### Local Mode
+- [ ] Click setup button during game → returns to setup
+- [ ] Change config fields → updates immediately
+- [ ] Start game → uses current config
+
+### Room Mode (Multi-User)
+- [ ] User A clicks setup → User B sees setup screen
+- [ ] User A changes difficulty → User B sees change in real-time
+- [ ] User B changes game type → User A sees change in real-time
+- [ ] User A starts game → Both users see game with same config
+
+### Edge Cases
+- [ ] Change config rapidly → no race conditions
+- [ ] User with 0 players can see/modify setup
+- [ ] Setup → Play → Setup preserves last config
+- [ ] Invalid config values are rejected by validator
+
+---
+
+## Migration Guide
+
+If you have an existing game using local state, follow these steps:
+
+### Step 1: Add Move Types
+Add `GO_TO_SETUP` and `SET_CONFIG` to your validation types.
+
+### Step 2: Implement Validators
+Add validators for the new moves in your game validator class.
+
+### Step 3: Add Optimistic Updates
+Update `applyMoveOptimistically` to handle the new moves.
+
+### Step 4: Remove Local State
+1. Delete all `useState` calls for configuration
+2. Delete the `effectiveState` merging logic
+3. Update action creators to send moves instead
+
+### Step 5: Test
+Run through the testing checklist above.
+
+---
+
+## Reference Implementation
+
+See the Matching game for a complete reference implementation:
+
+- **Types**: `src/lib/arcade/validation/types.ts`
+- **Validator**: `src/lib/arcade/validation/MatchingGameValidator.ts`
+- **Provider**: `src/app/arcade/matching/context/RoomMemoryPairsProvider.tsx`
+- **Optimistic Updates**: `applyMoveOptimistically` function in provider
+
+Look for comments marked with:
+- `// STANDARD ARCADE PATTERN: GO_TO_SETUP`
+- `// STANDARD ARCADE PATTERN: SET_CONFIG`
+- `// NO LOCAL STATE`
+- `// NO MORE effectiveState merging!`
+
+---
+
+## Questions?
+
+If something is unclear or you encounter issues implementing this pattern, refer to the Matching game implementation or update this document with clarifications.

apps/web/.claude/CLAUDE.md

@@ -0,0 +1,86 @@
+# Claude Code Instructions for apps/web
+
+## MANDATORY: Quality Checks for ALL Work
+
+**BEFORE declaring ANY work complete, fixed, or working**, you MUST run and pass these checks:
+
+### When This Applies
+- Before every commit
+- Before saying "it's done" or "it's fixed"
+- Before marking a task as complete
+- Before telling the user something is working
+- After any code changes, no matter how small
+
+```bash
+npm run pre-commit
+```
+
+This single command runs all quality checks in the correct order:
+1. `npm run type-check` - TypeScript type checking (must have 0 errors)
+2. `npm run format` - Auto-format all code with Biome
+3. `npm run lint:fix` - Auto-fix linting issues with Biome + ESLint
+4. `npm run lint` - Verify 0 errors, 0 warnings
+
+**DO NOT COMMIT** until all checks pass with zero errors and zero warnings.
+
+## Available Scripts
+
+```bash
+npm run type-check    # TypeScript: tsc --noEmit
+npm run format        # Biome: format all files
+npm run format:check  # Biome: check formatting without fixing
+npm run lint          # Biome + ESLint: check for errors/warnings
+npm run lint:fix      # Biome + ESLint: auto-fix issues
+npm run check         # Biome: full check (format + lint + imports)
+npm run pre-commit    # Run all checks (type + format + lint)
+```
+
+## Workflow
+
+When asked to make ANY changes:
+
+1. Make your code changes
+2. Run `npm run pre-commit`
+3. If it fails, fix the issues and run again
+4. Only after all checks pass can you:
+   - Say the work is "done" or "complete"
+   - Mark tasks as finished
+   - Create commits
+   - Tell the user it's working
+5. Push immediately after committing
+
+**Nothing is complete until `npm run pre-commit` passes.**
+
+## Details
+
+See `.claude/CODE_QUALITY_REGIME.md` for complete documentation.
+
+## No Pre-Commit Hooks
+
+This project does not use git pre-commit hooks for religious reasons.
+You (Claude Code) are responsible for enforcing code quality before commits.
+
+## Quick Reference: package.json Scripts
+
+**Primary workflow:**
+```bash
+npm run pre-commit  # ← Use this before every commit
+```
+
+**Individual checks (if needed):**
+```bash
+npm run type-check     # TypeScript: tsc --noEmit
+npm run format         # Biome: format code (--write)
+npm run lint           # Biome + ESLint: check only
+npm run lint:fix       # Biome + ESLint: auto-fix
+```
+
+**Additional tools:**
+```bash
+npm run format:check   # Check formatting without changing files
+npm run check          # Biome check (format + lint + organize imports)
+```
+
+---
+
+**Remember: Always run `npm run pre-commit` before creating commits.**

apps/web/.claude/CODE_QUALITY_REGIME.md

@@ -0,0 +1,143 @@
+# Code Quality Regime
+
+**MANDATORY**: Before declaring ANY work complete, fixed, or working, Claude MUST run these checks and fix all issues.
+
+## Definition of "Done"
+
+Work is NOT complete until:
+- ✅ All TypeScript errors are fixed (0 errors)
+- ✅ All code is formatted with Biome
+- ✅ All linting passes (0 errors, 0 warnings)
+- ✅ `npm run pre-commit` exits successfully
+
+**Until these checks pass, the work is considered incomplete.**
+
+## Quality Check Checklist (Always Required)
+
+Run these before:
+- Committing code
+- Saying work is "done" or "complete"
+- Marking tasks as finished
+- Telling the user something is "working" or "fixed"
+
+Run these commands in order. All must pass with 0 errors and 0 warnings:
+
+```bash
+# 1. Type check
+npm run type-check
+
+# 2. Format code
+npm run format
+
+# 3. Lint and fix
+npm run lint:fix
+
+# 4. Verify clean state
+npm run lint && npm run type-check
+```
+
+## Quick Command (Run All Checks)
+
+```bash
+npm run pre-commit
+```
+
+**What it does:**
+```json
+"pre-commit": "npm run type-check && npm run format && npm run lint:fix && npm run lint"
+```
+
+This single command runs:
+1. `npm run type-check` → `tsc --noEmit` (TypeScript errors)
+2. `npm run format` → `npx @biomejs/biome format . --write` (auto-format)
+3. `npm run lint:fix` → `npx @biomejs/biome lint . --write && npx eslint . --fix` (auto-fix)
+4. `npm run lint` → `npx @biomejs/biome lint . && npx eslint .` (verify clean)
+
+Fails fast if any step fails.
+
+## The Regime Rules
+
+### 1. TypeScript Errors: ZERO TOLERANCE
+- Run `npm run type-check` before every commit
+- Fix ALL TypeScript errors
+- No `@ts-ignore` or `@ts-expect-error` without explicit justification
+
+### 2. Formatting: AUTOMATIC
+- Run `npm run format` before every commit
+- Biome handles all formatting automatically
+- Never commit unformatted code
+
+### 3. Linting: ZERO ERRORS, ZERO WARNINGS
+- Run `npm run lint:fix` to auto-fix issues
+- Then run `npm run lint` to verify 0 errors, 0 warnings
+- Fix any remaining issues manually
+
+### 4. Commit Order
+1. Make code changes
+2. Run `npm run pre-commit`
+3. If any check fails, fix and repeat
+4. Only commit when all checks pass
+5. Push immediately after commit
+
+## Why No Pre-Commit Hooks?
+
+This project intentionally avoids pre-commit hooks due to religious constraints.
+Instead, Claude Code is responsible for enforcing this regime through:
+
+1. **This documentation** - Always visible and reference-able
+2. **Package.json scripts** - Easy to run checks
+3. **Session persistence** - This file lives in `.claude/` and is read by every session
+
+## For Claude Code Sessions
+
+**READ THIS FILE AT THE START OF EVERY SESSION WHERE YOU WILL COMMIT CODE**
+
+When asked to commit:
+1. Check if you've run `npm run pre-commit` (or all 4 steps individually)
+2. If not, STOP and run the checks first
+3. Fix all issues before proceeding with the commit
+4. Only create commits when all checks pass
+
+## Complete Scripts Reference
+
+From `apps/web/package.json`:
+
+```json
+{
+  "scripts": {
+    "type-check": "tsc --noEmit",
+    "format": "npx @biomejs/biome format . --write",
+    "format:check": "npx @biomejs/biome format .",
+    "lint": "npx @biomejs/biome lint . && npx eslint .",
+    "lint:fix": "npx @biomejs/biome lint . --write && npx eslint . --fix",
+    "check": "npx @biomejs/biome check .",
+    "pre-commit": "npm run type-check && npm run format && npm run lint:fix && npm run lint"
+  }
+}
+```
+
+**Tools used:**
+- TypeScript: `tsc --noEmit` (type checking only, no output)
+- Biome: Fast formatter + linter (Rust-based, 10-100x faster than Prettier)
+- ESLint: React Hooks rules only (`rules-of-hooks` validation)
+
+## Emergency Override
+
+If you absolutely MUST commit with failing checks:
+1. Document WHY in the commit message
+2. Create a follow-up task to fix the issues
+3. Only use for emergency hotfixes
+
+## Verification
+
+After following this regime, you should see:
+```
+✓ Type check passed (0 errors)
+✓ Formatting applied
+✓ Linting passed (0 errors, 0 warnings)
+✓ Ready to commit
+```
+
+---
+
+**This regime is non-negotiable. Every commit must pass these checks.**

apps/web/.claude/settings.local.json

@@ -0,0 +1,19 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(npm test:*)",
+      "Read(//Users/antialias/projects/**)",
+      "Bash(npm run lint:*)",
+      "Bash(git add:*)",
+      "Bash(git commit:*)",
+      "Bash(git push:*)",
+      "Bash(git pull:*)",
+      "Bash(git stash:*)",
+      "Bash(npm run format:*)",
+      "Bash(npm run pre-commit:*)",
+      "Bash(npm run type-check:*)"
+    ],
+    "deny": [],
+    "ask": []
+  }
+}

apps/web/.gitignore

@@ -0,0 +1,50 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts
+
+# vitest
+/.vitest
+
+# storybook
+storybook-static
+
+# panda css
+styled-system
+
+# generated
+src/generated/build-info.json
+
+# biome
+.biome

apps/web/.storybook/main.ts

@@ -1,36 +1,31 @@
-import type { StorybookConfig } from '@storybook/nextjs';
+import type { StorybookConfig } from '@storybook/nextjs'
 
-import { join, dirname } from "path"
+import { dirname, join } from 'path'
 
 /**
-* This function is used to resolve the absolute path of a package.
-* It is needed in projects that use Yarn PnP or are set up within a monorepo.
-*/
+ * This function is used to resolve the absolute path of a package.
+ * It is needed in projects that use Yarn PnP or are set up within a monorepo.
+ */
 function getAbsolutePath(value: string): any {
   return dirname(require.resolve(join(value, 'package.json')))
 }
 const config: StorybookConfig = {
-  "stories": [
-    "../src/**/*.mdx",
-    "../src/**/*.stories.@(js|jsx|mjs|ts|tsx)"
-  ],
-  "addons": [
+  stories: ['../src/**/*.mdx', '../src/**/*.stories.@(js|jsx|mjs|ts|tsx)'],
+  addons: [
     getAbsolutePath('@storybook/addon-docs'),
-    getAbsolutePath('@storybook/addon-onboarding')
+    getAbsolutePath('@storybook/addon-onboarding'),
   ],
-  "framework": {
-    "name": getAbsolutePath('@storybook/nextjs'),
-    "options": {
-      "nextConfigPath": "../next.config.js"
-    }
+  framework: {
+    name: getAbsolutePath('@storybook/nextjs'),
+    options: {
+      nextConfigPath: '../next.config.js',
+    },
   },
-  "staticDirs": [
-    "../public"
-  ],
-  "typescript": {
-    "reactDocgen": "react-docgen-typescript"
+  staticDirs: ['../public'],
+  typescript: {
+    reactDocgen: 'react-docgen-typescript',
   },
-  "webpackFinal": async (config) => {
+  webpackFinal: async (config) => {
     // Handle PandaCSS styled-system imports
     if (config.resolve) {
       config.resolve.alias = {
@@ -39,10 +34,10 @@ const config: StorybookConfig = {
         '../../styled-system/css': join(__dirname, '../styled-system/css/index.mjs'),
         '../../styled-system/patterns': join(__dirname, '../styled-system/patterns/index.mjs'),
         '../styled-system/css': join(__dirname, '../styled-system/css/index.mjs'),
-        '../styled-system/patterns': join(__dirname, '../styled-system/patterns/index.mjs')
+        '../styled-system/patterns': join(__dirname, '../styled-system/patterns/index.mjs'),
       }
     }
     return config
-  }
-};
-export default config;
+  },
+}
+export default config

apps/web/.storybook/preview.ts

@@ -5,11 +5,11 @@ const preview: Preview = {
   parameters: {
     controls: {
       matchers: {
-       color: /(background|color)$/i,
-       date: /Date$/i,
+        color: /(background|color)$/i,
+        date: /Date$/i,
       },
     },
   },
-};
+}
 
-export default preview;
+export default preview

apps/web/LINTING.md

@@ -0,0 +1,104 @@
+# Linting & Formatting Setup
+
+This project uses **Biome** for formatting and general linting, with **ESLint** handling React Hooks rules only.
+
+## Tools
+
+- **@biomejs/biome** - Fast formatter + linter + import organizer
+- **eslint** + **eslint-plugin-react-hooks** - React Hooks validation only
+
+## Scripts
+
+```bash
+# Check formatting and lint (non-destructive)
+npm run check
+
+# Lint all files
+npm run lint
+
+# Fix lint issues
+npm run lint:fix
+
+# Format all files
+npm run format
+
+# Check formatting (dry run)
+npm run format:check
+```
+
+## Configuration Files
+
+- `biome.jsonc` - Biome configuration (format + lint)
+- `eslint.config.js` - Minimal ESLint flat config for React Hooks only
+- `.gitignore` - Includes patterns for Biome cache
+
+## What Each Tool Does
+
+### Biome
+- Code formatting (Prettier-compatible)
+- General JavaScript/TypeScript linting
+- Import organization (alphabetical, remove unused)
+- Dead code detection
+- Performance optimizations
+
+### ESLint (React Hooks only)
+- `react-hooks/rules-of-hooks` - Ensures hooks are called unconditionally
+- `react-hooks/exhaustive-deps` - Warns about incomplete dependency arrays
+
+## IDE Integration
+
+### VS Code
+Install the Biome extension:
+```
+code --install-extension biomejs.biome
+```
+
+Add to `.vscode/settings.json`:
+```json
+{
+  "editor.defaultFormatter": "biomejs.biome",
+  "editor.formatOnSave": true,
+  "[javascript]": {
+    "editor.defaultFormatter": "biomejs.biome"
+  },
+  "[typescript]": {
+    "editor.defaultFormatter": "biomejs.biome"
+  },
+  "[typescriptreact]": {
+    "editor.defaultFormatter": "biomejs.biome"
+  }
+}
+```
+
+## CI/CD
+
+Add to your GitHub Actions workflow:
+
+```yaml
+- name: Lint
+  run: npm run lint
+
+- name: Check formatting
+  run: npm run format:check
+```
+
+## Migration from ESLint + Prettier
+
+This setup replaces most ESLint and Prettier functionality:
+- ✅ Removed `eslint-config-next` inline config from `package.json`
+- ✅ No `.eslintrc.js` or `.prettierrc` files needed
+- ✅ ESLint now only runs React Hooks rules
+- ✅ Biome handles all formatting and general linting
+
+## Why This Setup?
+
+1. **Speed** - Biome is 10-100x faster than ESLint + Prettier
+2. **Simplicity** - Single tool for most concerns
+3. **Accuracy** - ESLint still catches React-specific issues Biome can't yet handle
+4. **Low Maintenance** - Minimal config overlap
+
+## Customization
+
+To add custom lint rules, edit:
+- `biome.jsonc` for general rules
+- `eslint.config.js` for React Hooks rules

apps/web/__tests__/api-abacus-settings.e2e.test.ts

@@ -0,0 +1,344 @@
+/**
+ * @vitest-environment node
+ */
+
+import { eq } from 'drizzle-orm'
+import { afterEach, beforeEach, describe, expect, it } from 'vitest'
+import { db, schema } from '../src/db'
+
+/**
+ * API Abacus Settings E2E Tests
+ *
+ * These tests verify the abacus-settings API endpoints work correctly.
+ */
+
+describe('Abacus Settings API', () => {
+  let testUserId: string
+  let testGuestId: string
+
+  beforeEach(async () => {
+    // Create a test user with unique guest ID
+    testGuestId = `test-guest-${Date.now()}-${Math.random().toString(36).slice(2)}`
+    const [user] = await db.insert(schema.users).values({ guestId: testGuestId }).returning()
+    testUserId = user.id
+  })
+
+  afterEach(async () => {
+    // Clean up: delete test user (cascade deletes settings)
+    await db.delete(schema.users).where(eq(schema.users.id, testUserId))
+  })
+
+  describe('GET /api/abacus-settings', () => {
+    it('creates settings with defaults if none exist', async () => {
+      const [settings] = await db
+        .insert(schema.abacusSettings)
+        .values({ userId: testUserId })
+        .returning()
+
+      expect(settings).toBeDefined()
+      expect(settings.colorScheme).toBe('place-value')
+      expect(settings.beadShape).toBe('diamond')
+      expect(settings.colorPalette).toBe('default')
+      expect(settings.hideInactiveBeads).toBe(false)
+      expect(settings.coloredNumerals).toBe(false)
+      expect(settings.scaleFactor).toBe(1.0)
+      expect(settings.showNumbers).toBe(true)
+      expect(settings.animated).toBe(true)
+      expect(settings.interactive).toBe(false)
+      expect(settings.gestures).toBe(false)
+      expect(settings.soundEnabled).toBe(true)
+      expect(settings.soundVolume).toBe(0.8)
+    })
+
+    it('returns existing settings', async () => {
+      // Create settings
+      await db.insert(schema.abacusSettings).values({
+        userId: testUserId,
+        colorScheme: 'monochrome',
+        beadShape: 'circle',
+        soundEnabled: false,
+        soundVolume: 0.5,
+      })
+
+      const settings = await db.query.abacusSettings.findFirst({
+        where: eq(schema.abacusSettings.userId, testUserId),
+      })
+
+      expect(settings).toBeDefined()
+      expect(settings?.colorScheme).toBe('monochrome')
+      expect(settings?.beadShape).toBe('circle')
+      expect(settings?.soundEnabled).toBe(false)
+      expect(settings?.soundVolume).toBe(0.5)
+    })
+  })
+
+  describe('PATCH /api/abacus-settings', () => {
+    it('creates new settings if none exist', async () => {
+      const [settings] = await db
+        .insert(schema.abacusSettings)
+        .values({
+          userId: testUserId,
+          soundEnabled: false,
+        })
+        .returning()
+
+      expect(settings).toBeDefined()
+      expect(settings.soundEnabled).toBe(false)
+    })
+
+    it('updates existing settings', async () => {
+      // Create initial settings
+      await db.insert(schema.abacusSettings).values({
+        userId: testUserId,
+        colorScheme: 'place-value',
+        beadShape: 'diamond',
+      })
+
+      // Update
+      const [updated] = await db
+        .update(schema.abacusSettings)
+        .set({
+          colorScheme: 'heaven-earth',
+          beadShape: 'square',
+        })
+        .where(eq(schema.abacusSettings.userId, testUserId))
+        .returning()
+
+      expect(updated.colorScheme).toBe('heaven-earth')
+      expect(updated.beadShape).toBe('square')
+    })
+
+    it('updates only provided fields', async () => {
+      // Create initial settings
+      await db.insert(schema.abacusSettings).values({
+        userId: testUserId,
+        colorScheme: 'place-value',
+        soundEnabled: true,
+        soundVolume: 0.8,
+      })
+
+      // Update only soundEnabled
+      const [updated] = await db
+        .update(schema.abacusSettings)
+        .set({ soundEnabled: false })
+        .where(eq(schema.abacusSettings.userId, testUserId))
+        .returning()
+
+      expect(updated.soundEnabled).toBe(false)
+      expect(updated.colorScheme).toBe('place-value') // unchanged
+      expect(updated.soundVolume).toBe(0.8) // unchanged
+    })
+
+    it('prevents setting invalid userId via foreign key constraint', async () => {
+      // Create initial settings
+      await db.insert(schema.abacusSettings).values({
+        userId: testUserId,
+      })
+
+      // Try to update with invalid userId - should fail
+      await expect(async () => {
+        await db
+          .update(schema.abacusSettings)
+          .set({
+            userId: 'HACKER_ID_INVALID',
+            soundEnabled: false,
+          })
+          .where(eq(schema.abacusSettings.userId, testUserId))
+      }).rejects.toThrow()
+    })
+
+    it('allows updating all display settings', async () => {
+      await db.insert(schema.abacusSettings).values({
+        userId: testUserId,
+      })
+
+      const [updated] = await db
+        .update(schema.abacusSettings)
+        .set({
+          colorScheme: 'alternating',
+          beadShape: 'circle',
+          colorPalette: 'colorblind',
+          hideInactiveBeads: true,
+          coloredNumerals: true,
+          scaleFactor: 1.5,
+          showNumbers: false,
+          animated: false,
+          interactive: true,
+          gestures: true,
+          soundEnabled: false,
+          soundVolume: 0.3,
+        })
+        .where(eq(schema.abacusSettings.userId, testUserId))
+        .returning()
+
+      expect(updated.colorScheme).toBe('alternating')
+      expect(updated.beadShape).toBe('circle')
+      expect(updated.colorPalette).toBe('colorblind')
+      expect(updated.hideInactiveBeads).toBe(true)
+      expect(updated.coloredNumerals).toBe(true)
+      expect(updated.scaleFactor).toBe(1.5)
+      expect(updated.showNumbers).toBe(false)
+      expect(updated.animated).toBe(false)
+      expect(updated.interactive).toBe(true)
+      expect(updated.gestures).toBe(true)
+      expect(updated.soundEnabled).toBe(false)
+      expect(updated.soundVolume).toBe(0.3)
+    })
+  })
+
+  describe('Cascade delete behavior', () => {
+    it('deletes settings when user is deleted', async () => {
+      // Create settings
+      await db.insert(schema.abacusSettings).values({
+        userId: testUserId,
+        soundEnabled: false,
+      })
+
+      // Verify settings exist
+      let settings = await db.query.abacusSettings.findFirst({
+        where: eq(schema.abacusSettings.userId, testUserId),
+      })
+      expect(settings).toBeDefined()
+
+      // Delete user
+      await db.delete(schema.users).where(eq(schema.users.id, testUserId))
+
+      // Verify settings are gone
+      settings = await db.query.abacusSettings.findFirst({
+        where: eq(schema.abacusSettings.userId, testUserId),
+      })
+      expect(settings).toBeUndefined()
+    })
+  })
+
+  describe('Data isolation', () => {
+    it('ensures settings are isolated per user', async () => {
+      // Create another user
+      const testGuestId2 = `test-guest-2-${Date.now()}-${Math.random().toString(36).slice(2)}`
+      const [user2] = await db.insert(schema.users).values({ guestId: testGuestId2 }).returning()
+
+      try {
+        // Create settings for both users
+        await db.insert(schema.abacusSettings).values({
+          userId: testUserId,
+          colorScheme: 'monochrome',
+        })
+
+        await db.insert(schema.abacusSettings).values({
+          userId: user2.id,
+          colorScheme: 'place-value',
+        })
+
+        // Verify isolation
+        const settings1 = await db.query.abacusSettings.findFirst({
+          where: eq(schema.abacusSettings.userId, testUserId),
+        })
+        const settings2 = await db.query.abacusSettings.findFirst({
+          where: eq(schema.abacusSettings.userId, user2.id),
+        })
+
+        expect(settings1?.colorScheme).toBe('monochrome')
+        expect(settings2?.colorScheme).toBe('place-value')
+      } finally {
+        // Clean up second user
+        await db.delete(schema.users).where(eq(schema.users.id, user2.id))
+      }
+    })
+  })
+
+  describe('Security: userId injection prevention', () => {
+    it('rejects attempts to update settings with non-existent userId', async () => {
+      // Create initial settings
+      await db.insert(schema.abacusSettings).values({
+        userId: testUserId,
+        soundEnabled: true,
+      })
+
+      // Attempt to inject a fake userId
+      await expect(async () => {
+        await db
+          .update(schema.abacusSettings)
+          .set({
+            userId: 'HACKER_ID_NON_EXISTENT',
+            soundEnabled: false,
+          })
+          .where(eq(schema.abacusSettings.userId, testUserId))
+      }).rejects.toThrow(/FOREIGN KEY constraint failed/)
+    })
+
+    it("prevents modifying another user's settings via userId injection", async () => {
+      // Create victim user
+      const victimGuestId = `victim-${Date.now()}-${Math.random().toString(36).slice(2)}`
+      const [victimUser] = await db
+        .insert(schema.users)
+        .values({ guestId: victimGuestId })
+        .returning()
+
+      try {
+        // Create settings for both users
+        await db.insert(schema.abacusSettings).values({
+          userId: testUserId,
+          colorScheme: 'monochrome',
+          soundEnabled: true,
+        })
+
+        await db.insert(schema.abacusSettings).values({
+          userId: victimUser.id,
+          colorScheme: 'place-value',
+          soundEnabled: true,
+        })
+
+        // Attacker tries to change userId to victim's ID
+        // This is rejected because userId is PRIMARY KEY (UNIQUE constraint)
+        await expect(async () => {
+          await db
+            .update(schema.abacusSettings)
+            .set({
+              userId: victimUser.id, // Trying to inject victim's ID
+              soundEnabled: false,
+            })
+            .where(eq(schema.abacusSettings.userId, testUserId))
+        }).rejects.toThrow(/UNIQUE constraint failed/)
+
+        // Verify victim's settings are unchanged
+        const victimSettings = await db.query.abacusSettings.findFirst({
+          where: eq(schema.abacusSettings.userId, victimUser.id),
+        })
+        expect(victimSettings?.soundEnabled).toBe(true)
+        expect(victimSettings?.colorScheme).toBe('place-value')
+      } finally {
+        await db.delete(schema.users).where(eq(schema.users.id, victimUser.id))
+      }
+    })
+
+    it('prevents creating settings for another user via userId injection', async () => {
+      // Create victim user
+      const victimGuestId = `victim-${Date.now()}-${Math.random().toString(36).slice(2)}`
+      const [victimUser] = await db
+        .insert(schema.users)
+        .values({ guestId: victimGuestId })
+        .returning()
+
+      try {
+        // Try to create settings for victim with attacker's data
+        // This will succeed because foreign key exists, but in the real API
+        // the userId comes from session, not request body
+        const [maliciousSettings] = await db
+          .insert(schema.abacusSettings)
+          .values({
+            userId: victimUser.id,
+            colorScheme: 'alternating', // Attacker's preference
+          })
+          .returning()
+
+        // This test shows that at the DB level, we CAN insert for any valid userId
+        // The security comes from the API layer filtering userId from request body
+        // and deriving it from the session cookie instead
+        expect(maliciousSettings.userId).toBe(victimUser.id)
+        expect(maliciousSettings.colorScheme).toBe('alternating')
+      } finally {
+        await db.delete(schema.users).where(eq(schema.users.id, victimUser.id))
+      }
+    })
+  })
+})

apps/web/__tests__/api-arcade-rooms.e2e.test.ts

@@ -0,0 +1,455 @@
+/**
+ * @vitest-environment node
+ */
+
+import { eq } from 'drizzle-orm'
+import { afterEach, beforeEach, describe, expect, it } from 'vitest'
+import { db, schema } from '../src/db'
+import { createRoom } from '../src/lib/arcade/room-manager'
+import { addRoomMember } from '../src/lib/arcade/room-membership'
+
+/**
+ * Arcade Rooms API E2E Tests
+ *
+ * Tests the full arcade room system:
+ * - Room CRUD operations
+ * - Member management
+ * - Access control
+ * - Room code lookups
+ */
+
+describe('Arcade Rooms API', () => {
+  let testUserId1: string
+  let testUserId2: string
+  let testGuestId1: string
+  let testGuestId2: string
+  let testRoomId: string
+
+  beforeEach(async () => {
+    // Create test users
+    testGuestId1 = `test-guest-${Date.now()}-${Math.random().toString(36).slice(2)}`
+    testGuestId2 = `test-guest-${Date.now()}-${Math.random().toString(36).slice(2)}`
+
+    const [user1] = await db.insert(schema.users).values({ guestId: testGuestId1 }).returning()
+    const [user2] = await db.insert(schema.users).values({ guestId: testGuestId2 }).returning()
+
+    testUserId1 = user1.id
+    testUserId2 = user2.id
+  })
+
+  afterEach(async () => {
+    // Clean up rooms (cascade deletes members)
+    if (testRoomId) {
+      await db.delete(schema.arcadeRooms).where(eq(schema.arcadeRooms.id, testRoomId))
+    }
+
+    // Clean up users
+    await db.delete(schema.users).where(eq(schema.users.id, testUserId1))
+    await db.delete(schema.users).where(eq(schema.users.id, testUserId2))
+  })
+
+  describe('Room Creation', () => {
+    it('creates a room with valid data', async () => {
+      const room = await createRoom({
+        name: 'Test Room',
+        createdBy: testGuestId1,
+        creatorName: 'Test User',
+        gameName: 'matching',
+        gameConfig: { difficulty: 6 },
+      })
+
+      testRoomId = room.id
+
+      expect(room).toBeDefined()
+      expect(room.name).toBe('Test Room')
+      expect(room.createdBy).toBe(testGuestId1)
+      expect(room.gameName).toBe('matching')
+      expect(room.status).toBe('lobby')
+      expect(room.isLocked).toBe(false)
+      expect(room.ttlMinutes).toBe(60)
+      expect(room.code).toMatch(/^[A-Z0-9]{6}$/)
+    })
+
+    it('creates room with custom TTL', async () => {
+      const room = await createRoom({
+        name: 'Custom TTL Room',
+        createdBy: testGuestId1,
+        creatorName: 'Test User',
+        gameName: 'matching',
+        gameConfig: {},
+        ttlMinutes: 120,
+      })
+
+      testRoomId = room.id
+
+      expect(room.ttlMinutes).toBe(120)
+    })
+
+    it('generates unique room codes', async () => {
+      const room1 = await createRoom({
+        name: 'Room 1',
+        createdBy: testGuestId1,
+        creatorName: 'User 1',
+        gameName: 'matching',
+        gameConfig: {},
+      })
+
+      const room2 = await createRoom({
+        name: 'Room 2',
+        createdBy: testGuestId2,
+        creatorName: 'User 2',
+        gameName: 'matching',
+        gameConfig: {},
+      })
+
+      // Clean up both rooms
+      testRoomId = room1.id
+      await db.delete(schema.arcadeRooms).where(eq(schema.arcadeRooms.id, room2.id))
+
+      expect(room1.code).not.toBe(room2.code)
+    })
+  })
+
+  describe('Room Retrieval', () => {
+    beforeEach(async () => {
+      // Create a test room
+      const room = await createRoom({
+        name: 'Retrieval Test Room',
+        createdBy: testGuestId1,
+        creatorName: 'Test User',
+        gameName: 'matching',
+        gameConfig: {},
+      })
+      testRoomId = room.id
+    })
+
+    it('retrieves room by ID', async () => {
+      const room = await db.query.arcadeRooms.findFirst({
+        where: eq(schema.arcadeRooms.id, testRoomId),
+      })
+
+      expect(room).toBeDefined()
+      expect(room?.id).toBe(testRoomId)
+      expect(room?.name).toBe('Retrieval Test Room')
+    })
+
+    it('retrieves room by code', async () => {
+      const createdRoom = await db.query.arcadeRooms.findFirst({
+        where: eq(schema.arcadeRooms.id, testRoomId),
+      })
+
+      const room = await db.query.arcadeRooms.findFirst({
+        where: eq(schema.arcadeRooms.code, createdRoom!.code),
+      })
+
+      expect(room).toBeDefined()
+      expect(room?.id).toBe(testRoomId)
+    })
+
+    it('returns undefined for non-existent room', async () => {
+      const room = await db.query.arcadeRooms.findFirst({
+        where: eq(schema.arcadeRooms.id, 'nonexistent-room-id'),
+      })
+
+      expect(room).toBeUndefined()
+    })
+  })
+
+  describe('Room Updates', () => {
+    beforeEach(async () => {
+      const room = await createRoom({
+        name: 'Update Test Room',
+        createdBy: testGuestId1,
+        creatorName: 'Test User',
+        gameName: 'matching',
+        gameConfig: {},
+      })
+      testRoomId = room.id
+    })
+
+    it('updates room name', async () => {
+      const [updated] = await db
+        .update(schema.arcadeRooms)
+        .set({ name: 'Updated Name' })
+        .where(eq(schema.arcadeRooms.id, testRoomId))
+        .returning()
+
+      expect(updated.name).toBe('Updated Name')
+    })
+
+    it('locks room', async () => {
+      const [updated] = await db
+        .update(schema.arcadeRooms)
+        .set({ isLocked: true })
+        .where(eq(schema.arcadeRooms.id, testRoomId))
+        .returning()
+
+      expect(updated.isLocked).toBe(true)
+    })
+
+    it('updates room status', async () => {
+      const [updated] = await db
+        .update(schema.arcadeRooms)
+        .set({ status: 'playing' })
+        .where(eq(schema.arcadeRooms.id, testRoomId))
+        .returning()
+
+      expect(updated.status).toBe('playing')
+    })
+
+    it('updates lastActivity on any change', async () => {
+      const originalRoom = await db.query.arcadeRooms.findFirst({
+        where: eq(schema.arcadeRooms.id, testRoomId),
+      })
+
+      // Wait a bit to ensure different timestamp (at least 1 second for SQLite timestamp resolution)
+      await new Promise((resolve) => setTimeout(resolve, 1100))
+
+      const [updated] = await db
+        .update(schema.arcadeRooms)
+        .set({ name: 'Activity Test', lastActivity: new Date() })
+        .where(eq(schema.arcadeRooms.id, testRoomId))
+        .returning()
+
+      expect(updated.lastActivity.getTime()).toBeGreaterThan(originalRoom!.lastActivity.getTime())
+    })
+  })
+
+  describe('Room Deletion', () => {
+    it('deletes room', async () => {
+      const room = await createRoom({
+        name: 'Delete Test Room',
+        createdBy: testGuestId1,
+        creatorName: 'Test User',
+        gameName: 'matching',
+        gameConfig: {},
+      })
+
+      await db.delete(schema.arcadeRooms).where(eq(schema.arcadeRooms.id, room.id))
+
+      const deleted = await db.query.arcadeRooms.findFirst({
+        where: eq(schema.arcadeRooms.id, room.id),
+      })
+
+      expect(deleted).toBeUndefined()
+    })
+
+    it('cascades delete to room members', async () => {
+      const room = await createRoom({
+        name: 'Cascade Test Room',
+        createdBy: testGuestId1,
+        creatorName: 'Test User',
+        gameName: 'matching',
+        gameConfig: {},
+      })
+
+      // Add member
+      await addRoomMember({
+        roomId: room.id,
+        userId: testGuestId1,
+        displayName: 'Test User',
+      })
+
+      // Verify member exists
+      const membersBefore = await db.query.roomMembers.findMany({
+        where: eq(schema.roomMembers.roomId, room.id),
+      })
+      expect(membersBefore).toHaveLength(1)
+
+      // Delete room
+      await db.delete(schema.arcadeRooms).where(eq(schema.arcadeRooms.id, room.id))
+
+      // Verify members deleted
+      const membersAfter = await db.query.roomMembers.findMany({
+        where: eq(schema.roomMembers.roomId, room.id),
+      })
+      expect(membersAfter).toHaveLength(0)
+    })
+  })
+
+  describe('Room Members', () => {
+    beforeEach(async () => {
+      const room = await createRoom({
+        name: 'Members Test Room',
+        createdBy: testGuestId1,
+        creatorName: 'Test User 1',
+        gameName: 'matching',
+        gameConfig: {},
+      })
+      testRoomId = room.id
+    })
+
+    it('adds member to room', async () => {
+      const result = await addRoomMember({
+        roomId: testRoomId,
+        userId: testGuestId1,
+        displayName: 'Test User 1',
+        isCreator: true,
+      })
+
+      expect(result.member).toBeDefined()
+      expect(result.member.roomId).toBe(testRoomId)
+      expect(result.member.userId).toBe(testGuestId1)
+      expect(result.member.displayName).toBe('Test User 1')
+      expect(result.member.isCreator).toBe(true)
+      expect(result.member.isOnline).toBe(true)
+    })
+
+    it('adds multiple members to room', async () => {
+      await addRoomMember({
+        roomId: testRoomId,
+        userId: testGuestId1,
+        displayName: 'User 1',
+      })
+
+      await addRoomMember({
+        roomId: testRoomId,
+        userId: testGuestId2,
+        displayName: 'User 2',
+      })
+
+      const members = await db.query.roomMembers.findMany({
+        where: eq(schema.roomMembers.roomId, testRoomId),
+      })
+
+      expect(members).toHaveLength(2)
+    })
+
+    it('updates existing member instead of creating duplicate', async () => {
+      // Add member first time
+      await addRoomMember({
+        roomId: testRoomId,
+        userId: testGuestId1,
+        displayName: 'First Time',
+      })
+
+      // Add same member again
+      await addRoomMember({
+        roomId: testRoomId,
+        userId: testGuestId1,
+        displayName: 'Second Time',
+      })
+
+      const members = await db.query.roomMembers.findMany({
+        where: eq(schema.roomMembers.roomId, testRoomId),
+      })
+
+      // Should still only have 1 member
+      expect(members).toHaveLength(1)
+    })
+
+    it('removes member from room', async () => {
+      const result = await addRoomMember({
+        roomId: testRoomId,
+        userId: testGuestId1,
+        displayName: 'Test User',
+      })
+
+      await db.delete(schema.roomMembers).where(eq(schema.roomMembers.id, result.member.id))
+
+      const members = await db.query.roomMembers.findMany({
+        where: eq(schema.roomMembers.roomId, testRoomId),
+      })
+
+      expect(members).toHaveLength(0)
+    })
+
+    it('tracks online status', async () => {
+      const result = await addRoomMember({
+        roomId: testRoomId,
+        userId: testGuestId1,
+        displayName: 'Test User',
+      })
+
+      expect(result.member.isOnline).toBe(true)
+
+      // Set offline
+      const [updated] = await db
+        .update(schema.roomMembers)
+        .set({ isOnline: false })
+        .where(eq(schema.roomMembers.id, result.member.id))
+        .returning()
+
+      expect(updated.isOnline).toBe(false)
+    })
+  })
+
+  describe('Access Control', () => {
+    beforeEach(async () => {
+      const room = await createRoom({
+        name: 'Access Test Room',
+        createdBy: testGuestId1,
+        creatorName: 'Creator',
+        gameName: 'matching',
+        gameConfig: {},
+      })
+      testRoomId = room.id
+    })
+
+    it('identifies room creator correctly', async () => {
+      const room = await db.query.arcadeRooms.findFirst({
+        where: eq(schema.arcadeRooms.id, testRoomId),
+      })
+
+      expect(room?.createdBy).toBe(testGuestId1)
+    })
+
+    it('distinguishes creator from other users', async () => {
+      const room = await db.query.arcadeRooms.findFirst({
+        where: eq(schema.arcadeRooms.id, testRoomId),
+      })
+
+      expect(room?.createdBy).not.toBe(testGuestId2)
+    })
+  })
+
+  describe('Room Listing', () => {
+    beforeEach(async () => {
+      // Create multiple test rooms
+      const room1 = await createRoom({
+        name: 'Matching Room',
+        createdBy: testGuestId1,
+        creatorName: 'User 1',
+        gameName: 'matching',
+        gameConfig: {},
+      })
+
+      const room2 = await createRoom({
+        name: 'Memory Quiz Room',
+        createdBy: testGuestId2,
+        creatorName: 'User 2',
+        gameName: 'memory-quiz',
+        gameConfig: {},
+      })
+
+      testRoomId = room1.id
+
+      // Clean up room2 after test
+      afterEach(async () => {
+        await db.delete(schema.arcadeRooms).where(eq(schema.arcadeRooms.id, room2.id))
+      })
+    })
+
+    it('lists all active rooms', async () => {
+      const rooms = await db.query.arcadeRooms.findMany({
+        where: eq(schema.arcadeRooms.status, 'lobby'),
+      })
+
+      expect(rooms.length).toBeGreaterThanOrEqual(2)
+    })
+
+    it('excludes locked rooms from listing', async () => {
+      // Lock one room
+      await db
+        .update(schema.arcadeRooms)
+        .set({ isLocked: true })
+        .where(eq(schema.arcadeRooms.id, testRoomId))
+
+      const unlockedRooms = await db.query.arcadeRooms.findMany({
+        where: eq(schema.arcadeRooms.isLocked, false),
+      })
+
+      expect(unlockedRooms.every((r) => !r.isLocked)).toBe(true)
+    })
+  })
+})

apps/web/__tests__/api-players.e2e.test.ts

@@ -0,0 +1,500 @@
+/**
+ * @vitest-environment node
+ */
+
+import { eq } from 'drizzle-orm'
+import { afterEach, beforeEach, describe, expect, it } from 'vitest'
+import { db, schema } from '../src/db'
+
+/**
+ * API Players E2E Tests
+ *
+ * These tests verify the players API endpoints work correctly.
+ * They use the actual database and test the full request/response cycle.
+ */
+
+describe('Players API', () => {
+  let testUserId: string
+  let testGuestId: string
+
+  beforeEach(async () => {
+    // Create a test user with unique guest ID
+    testGuestId = `test-guest-${Date.now()}-${Math.random().toString(36).slice(2)}`
+    const [user] = await db.insert(schema.users).values({ guestId: testGuestId }).returning()
+    testUserId = user.id
+  })
+
+  afterEach(async () => {
+    // Clean up: delete test user (cascade deletes players)
+    await db.delete(schema.users).where(eq(schema.users.id, testUserId))
+  })
+
+  describe('POST /api/players', () => {
+    it('creates a player with valid data', async () => {
+      const playerData = {
+        name: 'Test Player',
+        emoji: '😀',
+        color: '#3b82f6',
+        isActive: true,
+      }
+
+      // Simulate creating via DB (API would do this)
+      const [player] = await db
+        .insert(schema.players)
+        .values({
+          userId: testUserId,
+          ...playerData,
+        })
+        .returning()
+
+      expect(player).toBeDefined()
+      expect(player.name).toBe(playerData.name)
+      expect(player.emoji).toBe(playerData.emoji)
+      expect(player.color).toBe(playerData.color)
+      expect(player.isActive).toBe(true)
+      expect(player.userId).toBe(testUserId)
+    })
+
+    it('sets isActive to false by default', async () => {
+      const [player] = await db
+        .insert(schema.players)
+        .values({
+          userId: testUserId,
+          name: 'Inactive Player',
+          emoji: '😴',
+          color: '#999999',
+        })
+        .returning()
+
+      expect(player.isActive).toBe(false)
+    })
+  })
+
+  describe('GET /api/players', () => {
+    it('returns all players for a user', async () => {
+      // Create multiple players
+      await db.insert(schema.players).values([
+        {
+          userId: testUserId,
+          name: 'Player 1',
+          emoji: '😀',
+          color: '#3b82f6',
+        },
+        {
+          userId: testUserId,
+          name: 'Player 2',
+          emoji: '😎',
+          color: '#8b5cf6',
+        },
+      ])
+
+      const players = await db.query.players.findMany({
+        where: eq(schema.players.userId, testUserId),
+      })
+
+      expect(players).toHaveLength(2)
+      expect(players[0].name).toBe('Player 1')
+      expect(players[1].name).toBe('Player 2')
+    })
+
+    it('returns empty array for user with no players', async () => {
+      const players = await db.query.players.findMany({
+        where: eq(schema.players.userId, testUserId),
+      })
+
+      expect(players).toHaveLength(0)
+    })
+  })
+
+  describe('PATCH /api/players/[id]', () => {
+    it('updates player fields', async () => {
+      const [player] = await db
+        .insert(schema.players)
+        .values({
+          userId: testUserId,
+          name: 'Original Name',
+          emoji: '😀',
+          color: '#3b82f6',
+        })
+        .returning()
+
+      const [updated] = await db
+        .update(schema.players)
+        .set({
+          name: 'Updated Name',
+          emoji: '🎉',
+        })
+        .where(eq(schema.players.id, player.id))
+        .returning()
+
+      expect(updated.name).toBe('Updated Name')
+      expect(updated.emoji).toBe('🎉')
+      expect(updated.color).toBe('#3b82f6') // unchanged
+    })
+
+    it('toggles isActive status', async () => {
+      const [player] = await db
+        .insert(schema.players)
+        .values({
+          userId: testUserId,
+          name: 'Test Player',
+          emoji: '😀',
+          color: '#3b82f6',
+          isActive: false,
+        })
+        .returning()
+
+      const [updated] = await db
+        .update(schema.players)
+        .set({ isActive: true })
+        .where(eq(schema.players.id, player.id))
+        .returning()
+
+      expect(updated.isActive).toBe(true)
+    })
+  })
+
+  describe('DELETE /api/players/[id]', () => {
+    it('deletes a player', async () => {
+      const [player] = await db
+        .insert(schema.players)
+        .values({
+          userId: testUserId,
+          name: 'To Delete',
+          emoji: '👋',
+          color: '#ef4444',
+        })
+        .returning()
+
+      const [deleted] = await db
+        .delete(schema.players)
+        .where(eq(schema.players.id, player.id))
+        .returning()
+
+      expect(deleted).toBeDefined()
+      expect(deleted.id).toBe(player.id)
+
+      // Verify it's gone
+      const found = await db.query.players.findFirst({
+        where: eq(schema.players.id, player.id),
+      })
+      expect(found).toBeUndefined()
+    })
+  })
+
+  describe('Cascade delete behavior', () => {
+    it('deletes players when user is deleted', async () => {
+      // Create players
+      await db.insert(schema.players).values([
+        {
+          userId: testUserId,
+          name: 'Player 1',
+          emoji: '😀',
+          color: '#3b82f6',
+        },
+        {
+          userId: testUserId,
+          name: 'Player 2',
+          emoji: '😎',
+          color: '#8b5cf6',
+        },
+      ])
+
+      // Verify players exist
+      let players = await db.query.players.findMany({
+        where: eq(schema.players.userId, testUserId),
+      })
+      expect(players).toHaveLength(2)
+
+      // Delete user
+      await db.delete(schema.users).where(eq(schema.users.id, testUserId))
+
+      // Verify players are gone
+      players = await db.query.players.findMany({
+        where: eq(schema.players.userId, testUserId),
+      })
+      expect(players).toHaveLength(0)
+    })
+  })
+
+  describe('Arcade Session: isActive Modification Restrictions', () => {
+    it('prevents isActive changes when user has an active arcade session', async () => {
+      // Create a player
+      const [player] = await db
+        .insert(schema.players)
+        .values({
+          userId: testUserId,
+          name: 'Test Player',
+          emoji: '😀',
+          color: '#3b82f6',
+          isActive: false,
+        })
+        .returning()
+
+      // Create an active arcade session
+      const now = new Date()
+      await db.insert(schema.arcadeSessions).values({
+        userId: testGuestId,
+        currentGame: 'matching',
+        gameUrl: '/arcade/matching',
+        gameState: JSON.stringify({}),
+        activePlayers: JSON.stringify([player.id]),
+        startedAt: now,
+        lastActivityAt: now,
+        expiresAt: new Date(now.getTime() + 3600000), // 1 hour from now
+        version: 1,
+      })
+
+      // Attempt to update isActive should be prevented at API level
+      // This test validates the logic that the API route implements
+      const activeSession = await db.query.arcadeSessions.findFirst({
+        where: eq(schema.arcadeSessions.userId, testGuestId),
+      })
+
+      expect(activeSession).toBeDefined()
+      expect(activeSession?.currentGame).toBe('matching')
+
+      // Clean up session
+      await db.delete(schema.arcadeSessions).where(eq(schema.arcadeSessions.userId, testGuestId))
+    })
+
+    it('allows isActive changes when user has no active arcade session', async () => {
+      // Create a player
+      const [player] = await db
+        .insert(schema.players)
+        .values({
+          userId: testUserId,
+          name: 'Test Player',
+          emoji: '😀',
+          color: '#3b82f6',
+          isActive: false,
+        })
+        .returning()
+
+      // Verify no active session
+      const activeSession = await db.query.arcadeSessions.findFirst({
+        where: eq(schema.arcadeSessions.userId, testGuestId),
+      })
+
+      expect(activeSession).toBeUndefined()
+
+      // Should be able to update isActive
+      const [updated] = await db
+        .update(schema.players)
+        .set({ isActive: true })
+        .where(eq(schema.players.id, player.id))
+        .returning()
+
+      expect(updated.isActive).toBe(true)
+    })
+
+    it('allows non-isActive changes even with active session', async () => {
+      // Create a player
+      const [player] = await db
+        .insert(schema.players)
+        .values({
+          userId: testUserId,
+          name: 'Test Player',
+          emoji: '😀',
+          color: '#3b82f6',
+          isActive: true,
+        })
+        .returning()
+
+      // Create an active arcade session
+      const now = new Date()
+      await db.insert(schema.arcadeSessions).values({
+        userId: testGuestId,
+        currentGame: 'matching',
+        gameUrl: '/arcade/matching',
+        gameState: JSON.stringify({}),
+        activePlayers: JSON.stringify([player.id]),
+        startedAt: now,
+        lastActivityAt: now,
+        expiresAt: new Date(now.getTime() + 3600000), // 1 hour from now
+        version: 1,
+      })
+
+      try {
+        // Should be able to update name, emoji, color (non-isActive fields)
+        const [updated] = await db
+          .update(schema.players)
+          .set({
+            name: 'Updated Name',
+            emoji: '🎉',
+            color: '#ff0000',
+          })
+          .where(eq(schema.players.id, player.id))
+          .returning()
+
+        expect(updated.name).toBe('Updated Name')
+        expect(updated.emoji).toBe('🎉')
+        expect(updated.color).toBe('#ff0000')
+        expect(updated.isActive).toBe(true) // Unchanged
+      } finally {
+        // Clean up session
+        await db.delete(schema.arcadeSessions).where(eq(schema.arcadeSessions.userId, testGuestId))
+      }
+    })
+
+    it('session ends, then isActive changes are allowed again', async () => {
+      // Create a player
+      const [player] = await db
+        .insert(schema.players)
+        .values({
+          userId: testUserId,
+          name: 'Test Player',
+          emoji: '😀',
+          color: '#3b82f6',
+          isActive: true,
+        })
+        .returning()
+
+      // Create an active arcade session
+      const now = new Date()
+      await db.insert(schema.arcadeSessions).values({
+        userId: testGuestId,
+        currentGame: 'matching',
+        gameUrl: '/arcade/matching',
+        gameState: JSON.stringify({}),
+        activePlayers: JSON.stringify([player.id]),
+        startedAt: now,
+        lastActivityAt: now,
+        expiresAt: new Date(now.getTime() + 3600000), // 1 hour from now
+        version: 1,
+      })
+
+      // Verify session exists
+      let activeSession = await db.query.arcadeSessions.findFirst({
+        where: eq(schema.arcadeSessions.userId, testGuestId),
+      })
+      expect(activeSession).toBeDefined()
+
+      // End the session
+      await db.delete(schema.arcadeSessions).where(eq(schema.arcadeSessions.userId, testGuestId))
+
+      // Verify session is gone
+      activeSession = await db.query.arcadeSessions.findFirst({
+        where: eq(schema.arcadeSessions.userId, testGuestId),
+      })
+      expect(activeSession).toBeUndefined()
+
+      // Now should be able to update isActive
+      const [updated] = await db
+        .update(schema.players)
+        .set({ isActive: false })
+        .where(eq(schema.players.id, player.id))
+        .returning()
+
+      expect(updated.isActive).toBe(false)
+    })
+  })
+
+  describe('Security: userId injection prevention', () => {
+    it('rejects creating player with non-existent userId', async () => {
+      // Attempt to create a player with a fake userId
+      await expect(async () => {
+        await db.insert(schema.players).values({
+          userId: 'HACKER_ID_NON_EXISTENT',
+          name: 'Hacker Player',
+          emoji: '🦹',
+          color: '#ff0000',
+        })
+      }).rejects.toThrow(/FOREIGN KEY constraint failed/)
+    })
+
+    it("prevents modifying another user's player via userId injection (DB layer alone is insufficient)", async () => {
+      // Create victim user and their player
+      const victimGuestId = `victim-${Date.now()}-${Math.random().toString(36).slice(2)}`
+      const [victimUser] = await db
+        .insert(schema.users)
+        .values({ guestId: victimGuestId })
+        .returning()
+
+      try {
+        // Create attacker's player
+        const [attackerPlayer] = await db
+          .insert(schema.players)
+          .values({
+            userId: testUserId,
+            name: 'Attacker Player',
+            emoji: '😈',
+            color: '#ff0000',
+          })
+          .returning()
+
+        const [_victimPlayer] = await db
+          .insert(schema.players)
+          .values({
+            userId: victimUser.id,
+            name: 'Victim Player',
+            emoji: '👤',
+            color: '#00ff00',
+            isActive: true,
+          })
+          .returning()
+
+        // IMPORTANT: At the DB level, changing userId to another valid userId SUCCEEDS
+        // This is why API layer MUST filter userId from request body!
+        const [updated] = await db
+          .update(schema.players)
+          .set({
+            userId: victimUser.id, // This WILL succeed at DB level!
+            name: 'Stolen Player',
+          })
+          .where(eq(schema.players.id, attackerPlayer.id))
+          .returning()
+
+        // The update succeeded - the player now belongs to victim!
+        expect(updated.userId).toBe(victimUser.id)
+        expect(updated.name).toBe('Stolen Player')
+
+        // This test demonstrates why the API route MUST:
+        // 1. Strip userId from request body
+        // 2. Derive userId from session cookie
+        // 3. Use WHERE clause to scope updates to current user's data only
+      } finally {
+        await db.delete(schema.users).where(eq(schema.users.id, victimUser.id))
+      }
+    })
+
+    it('ensures players are isolated per user', async () => {
+      // Create another user
+      const user2GuestId = `user2-${Date.now()}-${Math.random().toString(36).slice(2)}`
+      const [user2] = await db.insert(schema.users).values({ guestId: user2GuestId }).returning()
+
+      try {
+        // Create players for both users
+        await db.insert(schema.players).values({
+          userId: testUserId,
+          name: 'User 1 Player',
+          emoji: '🎮',
+          color: '#0000ff',
+        })
+
+        await db.insert(schema.players).values({
+          userId: user2.id,
+          name: 'User 2 Player',
+          emoji: '🎯',
+          color: '#ff00ff',
+        })
+
+        // Verify each user only sees their own players
+        const user1Players = await db.query.players.findMany({
+          where: eq(schema.players.userId, testUserId),
+        })
+        const user2Players = await db.query.players.findMany({
+          where: eq(schema.players.userId, user2.id),
+        })
+
+        expect(user1Players).toHaveLength(1)
+        expect(user1Players[0].name).toBe('User 1 Player')
+
+        expect(user2Players).toHaveLength(1)
+        expect(user2Players[0].name).toBe('User 2 Player')
+      } finally {
+        await db.delete(schema.users).where(eq(schema.users.id, user2.id))
+      }
+    })
+  })
+})

apps/web/__tests__/api-user-stats.e2e.test.ts

@@ -0,0 +1,186 @@
+/**
+ * @vitest-environment node
+ */
+
+import { eq } from 'drizzle-orm'
+import { afterEach, beforeEach, describe, expect, it } from 'vitest'
+import { db, schema } from '../src/db'
+
+/**
+ * API User Stats E2E Tests
+ *
+ * These tests verify the user-stats API endpoints work correctly.
+ */
+
+describe('User Stats API', () => {
+  let testUserId: string
+  let testGuestId: string
+
+  beforeEach(async () => {
+    // Create a test user with unique guest ID
+    testGuestId = `test-guest-${Date.now()}-${Math.random().toString(36).slice(2)}`
+    const [user] = await db.insert(schema.users).values({ guestId: testGuestId }).returning()
+    testUserId = user.id
+  })
+
+  afterEach(async () => {
+    // Clean up: delete test user (cascade deletes stats)
+    await db.delete(schema.users).where(eq(schema.users.id, testUserId))
+  })
+
+  describe('GET /api/user-stats', () => {
+    it('creates stats with defaults if none exist', async () => {
+      const [stats] = await db.insert(schema.userStats).values({ userId: testUserId }).returning()
+
+      expect(stats).toBeDefined()
+      expect(stats.gamesPlayed).toBe(0)
+      expect(stats.totalWins).toBe(0)
+      expect(stats.favoriteGameType).toBeNull()
+      expect(stats.bestTime).toBeNull()
+      expect(stats.highestAccuracy).toBe(0)
+    })
+
+    it('returns existing stats', async () => {
+      // Create stats
+      await db.insert(schema.userStats).values({
+        userId: testUserId,
+        gamesPlayed: 10,
+        totalWins: 7,
+        favoriteGameType: 'abacus-numeral',
+        bestTime: 5000,
+        highestAccuracy: 0.95,
+      })
+
+      const stats = await db.query.userStats.findFirst({
+        where: eq(schema.userStats.userId, testUserId),
+      })
+
+      expect(stats).toBeDefined()
+      expect(stats?.gamesPlayed).toBe(10)
+      expect(stats?.totalWins).toBe(7)
+      expect(stats?.favoriteGameType).toBe('abacus-numeral')
+      expect(stats?.bestTime).toBe(5000)
+      expect(stats?.highestAccuracy).toBe(0.95)
+    })
+  })
+
+  describe('PATCH /api/user-stats', () => {
+    it('creates new stats if none exist', async () => {
+      const [stats] = await db
+        .insert(schema.userStats)
+        .values({
+          userId: testUserId,
+          gamesPlayed: 1,
+          totalWins: 1,
+        })
+        .returning()
+
+      expect(stats).toBeDefined()
+      expect(stats.gamesPlayed).toBe(1)
+      expect(stats.totalWins).toBe(1)
+    })
+
+    it('updates existing stats', async () => {
+      // Create initial stats
+      await db.insert(schema.userStats).values({
+        userId: testUserId,
+        gamesPlayed: 5,
+        totalWins: 3,
+      })
+
+      // Update
+      const [updated] = await db
+        .update(schema.userStats)
+        .set({
+          gamesPlayed: 6,
+          totalWins: 4,
+          favoriteGameType: 'complement-pairs',
+        })
+        .where(eq(schema.userStats.userId, testUserId))
+        .returning()
+
+      expect(updated.gamesPlayed).toBe(6)
+      expect(updated.totalWins).toBe(4)
+      expect(updated.favoriteGameType).toBe('complement-pairs')
+    })
+
+    it('updates only provided fields', async () => {
+      // Create initial stats
+      await db.insert(schema.userStats).values({
+        userId: testUserId,
+        gamesPlayed: 10,
+        totalWins: 5,
+        bestTime: 3000,
+      })
+
+      // Update only gamesPlayed
+      const [updated] = await db
+        .update(schema.userStats)
+        .set({ gamesPlayed: 11 })
+        .where(eq(schema.userStats.userId, testUserId))
+        .returning()
+
+      expect(updated.gamesPlayed).toBe(11)
+      expect(updated.totalWins).toBe(5) // unchanged
+      expect(updated.bestTime).toBe(3000) // unchanged
+    })
+
+    it('allows setting favoriteGameType', async () => {
+      await db.insert(schema.userStats).values({
+        userId: testUserId,
+      })
+
+      const [updated] = await db
+        .update(schema.userStats)
+        .set({ favoriteGameType: 'abacus-numeral' })
+        .where(eq(schema.userStats.userId, testUserId))
+        .returning()
+
+      expect(updated.favoriteGameType).toBe('abacus-numeral')
+    })
+
+    it('allows setting bestTime and highestAccuracy', async () => {
+      await db.insert(schema.userStats).values({
+        userId: testUserId,
+      })
+
+      const [updated] = await db
+        .update(schema.userStats)
+        .set({
+          bestTime: 2500,
+          highestAccuracy: 0.98,
+        })
+        .where(eq(schema.userStats.userId, testUserId))
+        .returning()
+
+      expect(updated.bestTime).toBe(2500)
+      expect(updated.highestAccuracy).toBe(0.98)
+    })
+  })
+
+  describe('Cascade delete behavior', () => {
+    it('deletes stats when user is deleted', async () => {
+      // Create stats
+      await db.insert(schema.userStats).values({
+        userId: testUserId,
+        gamesPlayed: 10,
+        totalWins: 5,
+      })
+
+      // Verify stats exist
+      let stats = await db.query.userStats.findFirst({
+        where: eq(schema.userStats.userId, testUserId),
+      })
+      expect(stats).toBeDefined()
+
+      // Delete user
+      await db.delete(schema.users).where(eq(schema.users.id, testUserId))
+
+      // Verify stats are gone
+      stats = await db.query.userStats.findFirst({
+        where: eq(schema.userStats.userId, testUserId),
+      })
+      expect(stats).toBeUndefined()
+    })
+  })
+})

apps/web/__tests__/middleware.e2e.test.ts

@@ -0,0 +1,136 @@
+/**
+ * @vitest-environment node
+ */
+
+import { NextRequest } from 'next/server'
+import { beforeEach, describe, expect, it } from 'vitest'
+import { GUEST_COOKIE_NAME, verifyGuestToken } from '../src/lib/guest-token'
+import { middleware } from '../src/middleware'
+
+describe('Middleware E2E', () => {
+  beforeEach(() => {
+    process.env.AUTH_SECRET = 'test-secret-for-middleware'
+  })
+
+  it('sets guest cookie on first request', async () => {
+    const req = new NextRequest('http://localhost:3000/')
+    const res = await middleware(req)
+
+    const cookie = res.cookies.get(GUEST_COOKIE_NAME)
+
+    expect(cookie).toBeDefined()
+    expect(cookie?.value).toBeDefined()
+    expect(cookie?.httpOnly).toBe(true)
+    expect(cookie?.sameSite).toBe('lax')
+    expect(cookie?.path).toBe('/')
+  })
+
+  it('creates valid guest token', async () => {
+    const req = new NextRequest('http://localhost:3000/')
+    const res = await middleware(req)
+
+    const cookie = res.cookies.get(GUEST_COOKIE_NAME)
+    expect(cookie).toBeDefined()
+
+    // Verify the token is valid
+    const verified = await verifyGuestToken(cookie!.value)
+    expect(verified.sid).toBeDefined()
+    expect(typeof verified.sid).toBe('string')
+  })
+
+  it('preserves existing guest cookie', async () => {
+    // First request - creates cookie
+    const req1 = new NextRequest('http://localhost:3000/')
+    const res1 = await middleware(req1)
+    const cookie1 = res1.cookies.get(GUEST_COOKIE_NAME)
+
+    // Second request - with existing cookie
+    const req2 = new NextRequest('http://localhost:3000/')
+    req2.cookies.set(GUEST_COOKIE_NAME, cookie1!.value)
+    const res2 = await middleware(req2)
+
+    const cookie2 = res2.cookies.get(GUEST_COOKIE_NAME)
+
+    // Cookie should not be set again (preserves existing)
+    expect(cookie2).toBeUndefined()
+  })
+
+  it('sets different guest IDs for different visitors', async () => {
+    const req1 = new NextRequest('http://localhost:3000/')
+    const req2 = new NextRequest('http://localhost:3000/')
+
+    const res1 = await middleware(req1)
+    const res2 = await middleware(req2)
+
+    const cookie1 = res1.cookies.get(GUEST_COOKIE_NAME)
+    const cookie2 = res2.cookies.get(GUEST_COOKIE_NAME)
+
+    const verified1 = await verifyGuestToken(cookie1!.value)
+    const verified2 = await verifyGuestToken(cookie2!.value)
+
+    // Different visitors get different guest IDs
+    expect(verified1.sid).not.toBe(verified2.sid)
+  })
+
+  it('sets secure flag in production', async () => {
+    const originalEnv = process.env.NODE_ENV
+    Object.defineProperty(process.env, 'NODE_ENV', {
+      value: 'production',
+      configurable: true,
+    })
+
+    const req = new NextRequest('http://localhost:3000/')
+    const res = await middleware(req)
+
+    const cookie = res.cookies.get(GUEST_COOKIE_NAME)
+    expect(cookie?.secure).toBe(true)
+
+    Object.defineProperty(process.env, 'NODE_ENV', {
+      value: originalEnv,
+      configurable: true,
+    })
+  })
+
+  it('does not set secure flag in development', async () => {
+    const originalEnv = process.env.NODE_ENV
+    Object.defineProperty(process.env, 'NODE_ENV', {
+      value: 'development',
+      configurable: true,
+    })
+
+    const req = new NextRequest('http://localhost:3000/')
+    const res = await middleware(req)
+
+    const cookie = res.cookies.get(GUEST_COOKIE_NAME)
+    expect(cookie?.secure).toBe(false)
+
+    Object.defineProperty(process.env, 'NODE_ENV', {
+      value: originalEnv,
+      configurable: true,
+    })
+  })
+
+  it('sets maxAge correctly', async () => {
+    const req = new NextRequest('http://localhost:3000/')
+    const res = await middleware(req)
+
+    const cookie = res.cookies.get(GUEST_COOKIE_NAME)
+    expect(cookie?.maxAge).toBe(60 * 60 * 24 * 30) // 30 days
+  })
+
+  it('runs on valid paths', async () => {
+    const paths = [
+      'http://localhost:3000/',
+      'http://localhost:3000/games',
+      'http://localhost:3000/tutorial-editor',
+      'http://localhost:3000/some/deep/path',
+    ]
+
+    for (const path of paths) {
+      const req = new NextRequest(path)
+      const res = await middleware(req)
+      const cookie = res.cookies.get(GUEST_COOKIE_NAME)
+      expect(cookie).toBeDefined()
+    }
+  })
+})

apps/web/__tests__/orphaned-session.e2e.test.ts

@@ -0,0 +1,203 @@
+import { afterEach, beforeEach, describe, expect, it } from 'vitest'
+import { eq } from 'drizzle-orm'
+import { db, schema } from '../src/db'
+import { createArcadeSession, getArcadeSession } from '../src/lib/arcade/session-manager'
+import { cleanupExpiredRooms, createRoom } from '../src/lib/arcade/room-manager'
+
+/**
+ * E2E Test: Orphaned Session After Room TTL Deletion
+ *
+ * This test simulates the exact scenario reported by the user:
+ * 1. User creates a game session in a room
+ * 2. Room expires via TTL cleanup
+ * 3. User navigates to /arcade
+ * 4. System should NOT redirect to the orphaned game
+ * 5. User should see the arcade lobby normally
+ */
+describe('E2E: Orphaned Session Cleanup on Navigation', () => {
+  const testUserId = 'e2e-user-id'
+  const testGuestId = 'e2e-guest-id'
+  let testRoomId: string
+
+  beforeEach(async () => {
+    // Create test user (simulating new or returning visitor)
+    await db
+      .insert(schema.users)
+      .values({
+        id: testUserId,
+        guestId: testGuestId,
+        createdAt: new Date(),
+      })
+      .onConflictDoNothing()
+  })
+
+  afterEach(async () => {
+    // Clean up test data
+    await db.delete(schema.arcadeSessions).where(eq(schema.arcadeSessions.userId, testUserId))
+    await db.delete(schema.users).where(eq(schema.users.id, testUserId))
+    if (testRoomId) {
+      try {
+        await db.delete(schema.arcadeRooms).where(eq(schema.arcadeRooms.id, testRoomId))
+      } catch {
+        // Room may already be deleted
+      }
+    }
+  })
+
+  it('should not redirect user to orphaned game after room TTL cleanup', async () => {
+    // === SETUP PHASE ===
+    // User creates or joins a room
+    const room = await createRoom({
+      name: 'My Game Room',
+      createdBy: testGuestId,
+      creatorName: 'Test Player',
+      gameName: 'matching',
+      gameConfig: { difficulty: 6, gameType: 'abacus-numeral', turnTimer: 30 },
+      ttlMinutes: 1, // Short TTL for testing
+    })
+    testRoomId = room.id
+
+    // User starts a game session
+    const session = await createArcadeSession({
+      userId: testGuestId,
+      gameName: 'matching',
+      gameUrl: '/arcade/matching',
+      initialState: {
+        gamePhase: 'playing',
+        cards: [],
+        gameCards: [],
+        flippedCards: [],
+        matchedPairs: 0,
+        totalPairs: 6,
+        currentPlayer: 'player-1',
+        difficulty: 6,
+        gameType: 'abacus-numeral',
+        turnTimer: 30,
+      },
+      activePlayers: ['player-1'],
+      roomId: room.id,
+    })
+
+    // Verify session was created
+    expect(session).toBeDefined()
+    expect(session.roomId).toBe(room.id)
+
+    // === TTL EXPIRATION PHASE ===
+    // Simulate time passing - room's TTL expires
+    // Set lastActivity to past so cleanup detects it
+    await db
+      .update(schema.arcadeRooms)
+      .set({
+        lastActivity: new Date(Date.now() - 2 * 60 * 1000), // 2 minutes ago
+      })
+      .where(eq(schema.arcadeRooms.id, room.id))
+
+    // Run cleanup (simulating background cleanup job)
+    const deletedCount = await cleanupExpiredRooms()
+    expect(deletedCount).toBeGreaterThan(0) // Room should be deleted
+
+    // === USER NAVIGATION PHASE ===
+    // User navigates to /arcade (arcade lobby)
+    // The useArcadeRedirect hook calls getArcadeSession to check for active session
+    const activeSession = await getArcadeSession(testGuestId)
+
+    // === ASSERTION PHASE ===
+    // Expected behavior: NO active session returned
+    // This prevents redirect to /arcade/matching which would be broken
+    expect(activeSession).toBeUndefined()
+
+    // Verify the orphaned session was cleaned up from database
+    const [orphanedSessionCheck] = await db
+      .select()
+      .from(schema.arcadeSessions)
+      .where(eq(schema.arcadeSessions.userId, testUserId))
+      .limit(1)
+
+    expect(orphanedSessionCheck).toBeUndefined()
+  })
+
+  it('should allow user to start new game after orphaned session cleanup', async () => {
+    // === SETUP: Create and orphan a session ===
+    const oldRoom = await createRoom({
+      name: 'Old Room',
+      createdBy: testGuestId,
+      creatorName: 'Test Player',
+      gameName: 'matching',
+      gameConfig: { difficulty: 6 },
+      ttlMinutes: 1,
+    })
+
+    await createArcadeSession({
+      userId: testGuestId,
+      gameName: 'matching',
+      gameUrl: '/arcade/matching',
+      initialState: { gamePhase: 'setup' },
+      activePlayers: ['player-1'],
+      roomId: oldRoom.id,
+    })
+
+    // Delete room (TTL cleanup)
+    await db.delete(schema.arcadeRooms).where(eq(schema.arcadeRooms.id, oldRoom.id))
+
+    // === ACTION: User tries to access arcade ===
+    const orphanedSession = await getArcadeSession(testGuestId)
+    expect(orphanedSession).toBeUndefined() // Orphan cleaned up
+
+    // === ACTION: User creates new room and session ===
+    const newRoom = await createRoom({
+      name: 'New Room',
+      createdBy: testGuestId,
+      creatorName: 'Test Player',
+      gameName: 'matching',
+      gameConfig: { difficulty: 8 },
+      ttlMinutes: 60,
+    })
+    testRoomId = newRoom.id
+
+    const newSession = await createArcadeSession({
+      userId: testGuestId,
+      gameName: 'matching',
+      gameUrl: '/arcade/matching',
+      initialState: { gamePhase: 'setup' },
+      activePlayers: ['player-1', 'player-2'],
+      roomId: newRoom.id,
+    })
+
+    // === ASSERTION: New session works correctly ===
+    expect(newSession).toBeDefined()
+    expect(newSession.roomId).toBe(newRoom.id)
+
+    const activeSession = await getArcadeSession(testGuestId)
+    expect(activeSession).toBeDefined()
+    expect(activeSession?.roomId).toBe(newRoom.id)
+  })
+
+  it('should handle race condition: getArcadeSession called while room is being deleted', async () => {
+    // Create room and session
+    const room = await createRoom({
+      name: 'Race Condition Room',
+      createdBy: testGuestId,
+      creatorName: 'Test Player',
+      gameName: 'matching',
+      gameConfig: { difficulty: 6 },
+      ttlMinutes: 60,
+    })
+    testRoomId = room.id
+
+    await createArcadeSession({
+      userId: testGuestId,
+      gameName: 'matching',
+      gameUrl: '/arcade/matching',
+      initialState: { gamePhase: 'setup' },
+      activePlayers: ['player-1'],
+      roomId: room.id,
+    })
+
+    // Simulate race: delete room while getArcadeSession is checking
+    await db.delete(schema.arcadeRooms).where(eq(schema.arcadeRooms.id, room.id))
+
+    // Should gracefully handle and return undefined
+    const result = await getArcadeSession(testGuestId)
+    expect(result).toBeUndefined()
+  })
+})

apps/web/__tests__/room-realtime-updates.e2e.test.ts

@@ -0,0 +1,371 @@
+/**
+ * @vitest-environment node
+ */
+
+import { createServer } from 'http'
+import { eq } from 'drizzle-orm'
+import { io as ioClient, type Socket } from 'socket.io-client'
+import { afterEach, beforeEach, describe, expect, it, afterAll, beforeAll } from 'vitest'
+import { db, schema } from '../src/db'
+import { createRoom } from '../src/lib/arcade/room-manager'
+import { addRoomMember } from '../src/lib/arcade/room-membership'
+import { initializeSocketServer } from '../socket-server'
+import type { Server as SocketIOServerType } from 'socket.io'
+
+/**
+ * Real-time Room Updates E2E Tests
+ *
+ * Tests that socket broadcasts work correctly when users join/leave rooms.
+ * Simulates multiple connected users and verifies they receive real-time updates.
+ */
+
+describe('Room Real-time Updates', () => {
+  let testUserId1: string
+  let testUserId2: string
+  let testGuestId1: string
+  let testGuestId2: string
+  let testRoomId: string
+  let socket1: Socket
+  let httpServer: any
+  let io: SocketIOServerType
+  let serverPort: number
+
+  beforeAll(async () => {
+    // Create HTTP server and initialize Socket.IO for testing
+    httpServer = createServer()
+    io = initializeSocketServer(httpServer)
+
+    // Find an available port
+    await new Promise<void>((resolve) => {
+      httpServer.listen(0, () => {
+        serverPort = (httpServer.address() as any).port
+        console.log(`Test socket server listening on port ${serverPort}`)
+        resolve()
+      })
+    })
+  })
+
+  afterAll(async () => {
+    // Close all socket connections
+    if (io) {
+      io.close()
+    }
+    if (httpServer) {
+      await new Promise<void>((resolve) => {
+        httpServer.close(() => resolve())
+      })
+    }
+  })
+
+  beforeEach(async () => {
+    // Create test users
+    testGuestId1 = `test-guest-${Date.now()}-${Math.random().toString(36).slice(2)}`
+    testGuestId2 = `test-guest-${Date.now()}-${Math.random().toString(36).slice(2)}`
+
+    const [user1] = await db.insert(schema.users).values({ guestId: testGuestId1 }).returning()
+    const [user2] = await db.insert(schema.users).values({ guestId: testGuestId2 }).returning()
+
+    testUserId1 = user1.id
+    testUserId2 = user2.id
+
+    // Create a test room
+    const room = await createRoom({
+      name: 'Realtime Test Room',
+      createdBy: testGuestId1,
+      creatorName: 'User 1',
+      gameName: 'matching',
+      gameConfig: { difficulty: 6 },
+      ttlMinutes: 60,
+    })
+    testRoomId = room.id
+  })
+
+  afterEach(async () => {
+    // Disconnect sockets
+    if (socket1?.connected) {
+      socket1.disconnect()
+    }
+
+    // Clean up room members
+    await db.delete(schema.roomMembers).where(eq(schema.roomMembers.roomId, testRoomId))
+
+    // Clean up rooms
+    if (testRoomId) {
+      await db.delete(schema.arcadeRooms).where(eq(schema.arcadeRooms.id, testRoomId))
+    }
+
+    // Clean up users
+    await db.delete(schema.users).where(eq(schema.users.id, testUserId1))
+    await db.delete(schema.users).where(eq(schema.users.id, testUserId2))
+  })
+
+  it('should broadcast member-joined when a user joins via API', async () => {
+    // User 1 joins the room via API first (this is what happens when they click "Join Room")
+    await addRoomMember({
+      roomId: testRoomId,
+      userId: testGuestId1,
+      displayName: 'User 1',
+      isCreator: false,
+    })
+
+    // User 1 connects to socket
+    socket1 = ioClient(`http://localhost:${serverPort}`, {
+      path: '/api/socket',
+      transports: ['websocket'],
+    })
+
+    // Wait for socket to connect
+    await new Promise<void>((resolve, reject) => {
+      socket1.on('connect', () => resolve())
+      socket1.on('connect_error', (err) => reject(err))
+      setTimeout(() => reject(new Error('Connection timeout')), 2000)
+    })
+
+    // Small delay to ensure event handlers are set up
+    await new Promise((resolve) => setTimeout(resolve, 50))
+
+    // Set up listener for room-joined BEFORE emitting
+    const roomJoinedPromise = new Promise<void>((resolve, reject) => {
+      socket1.on('room-joined', () => resolve())
+      socket1.on('room-error', (err) => reject(new Error(err.error)))
+      setTimeout(() => reject(new Error('Room-joined timeout')), 3000)
+    })
+
+    // Now emit the join-room event
+    socket1.emit('join-room', { roomId: testRoomId, userId: testGuestId1 })
+
+    // Wait for confirmation
+    await roomJoinedPromise
+
+    // Set up listener for member-joined event BEFORE User 2 joins
+    const memberJoinedPromise = new Promise<any>((resolve, reject) => {
+      socket1.on('member-joined', (data) => {
+        resolve(data)
+      })
+      setTimeout(() => reject(new Error('Timeout waiting for member-joined event')), 3000)
+    })
+
+    // User 2 joins the room via addRoomMember
+    const { member: newMember } = await addRoomMember({
+      roomId: testRoomId,
+      userId: testGuestId2,
+      displayName: 'User 2',
+      isCreator: false,
+    })
+
+    // Manually trigger the broadcast (this is what the API route SHOULD do)
+    const { getRoomMembers } = await import('../src/lib/arcade/room-membership')
+    const { getRoomActivePlayers } = await import('../src/lib/arcade/player-manager')
+
+    const members = await getRoomMembers(testRoomId)
+    const memberPlayers = await getRoomActivePlayers(testRoomId)
+
+    const memberPlayersObj: Record<string, any[]> = {}
+    for (const [uid, players] of memberPlayers.entries()) {
+      memberPlayersObj[uid] = players
+    }
+
+    io.to(`room:${testRoomId}`).emit('member-joined', {
+      roomId: testRoomId,
+      userId: testGuestId2,
+      members,
+      memberPlayers: memberPlayersObj,
+    })
+
+    // Wait for the socket broadcast with timeout
+    const data = await memberJoinedPromise
+
+    // Verify the broadcast data
+    expect(data).toBeDefined()
+    expect(data.roomId).toBe(testRoomId)
+    expect(data.userId).toBe(testGuestId2)
+    expect(data.members).toBeDefined()
+    expect(Array.isArray(data.members)).toBe(true)
+
+    // Verify both users are in the members list
+    const memberUserIds = data.members.map((m: any) => m.userId)
+    expect(memberUserIds).toContain(testGuestId1)
+    expect(memberUserIds).toContain(testGuestId2)
+
+    // Verify the new member details
+    const addedMember = data.members.find((m: any) => m.userId === testGuestId2)
+    expect(addedMember).toBeDefined()
+    expect(addedMember.displayName).toBe('User 2')
+    expect(addedMember.roomId).toBe(testRoomId)
+  })
+
+  it('should broadcast member-left when a user leaves via API', async () => {
+    // User 1 joins the room first
+    await addRoomMember({
+      roomId: testRoomId,
+      userId: testGuestId1,
+      displayName: 'User 1',
+      isCreator: false,
+    })
+
+    // User 2 joins the room
+    await addRoomMember({
+      roomId: testRoomId,
+      userId: testGuestId2,
+      displayName: 'User 2',
+      isCreator: false,
+    })
+
+    // User 1 connects to socket
+    socket1 = ioClient(`http://localhost:${serverPort}`, {
+      path: '/api/socket',
+      transports: ['websocket'],
+    })
+
+    await new Promise<void>((resolve) => {
+      socket1.on('connect', () => resolve())
+    })
+
+    socket1.emit('join-room', { roomId: testRoomId, userId: testGuestId1 })
+
+    await new Promise<void>((resolve) => {
+      socket1.on('room-joined', () => resolve())
+    })
+
+    // Set up listener for member-left event
+    const memberLeftPromise = new Promise<any>((resolve) => {
+      socket1.on('member-left', (data) => {
+        resolve(data)
+      })
+    })
+
+    // User 2 leaves the room via API
+    await db.delete(schema.roomMembers).where(eq(schema.roomMembers.userId, testGuestId2))
+
+    // Manually trigger the leave broadcast (simulating what the API does)
+    const { getSocketIO } = await import('../src/lib/socket-io')
+    const io = await getSocketIO()
+    if (io) {
+      const { getRoomMembers } = await import('../src/lib/arcade/room-membership')
+      const { getRoomActivePlayers } = await import('../src/lib/arcade/player-manager')
+
+      const members = await getRoomMembers(testRoomId)
+      const memberPlayers = await getRoomActivePlayers(testRoomId)
+
+      const memberPlayersObj: Record<string, any[]> = {}
+      for (const [uid, players] of memberPlayers.entries()) {
+        memberPlayersObj[uid] = players
+      }
+
+      io.to(`room:${testRoomId}`).emit('member-left', {
+        roomId: testRoomId,
+        userId: testGuestId2,
+        members,
+        memberPlayers: memberPlayersObj,
+      })
+    }
+
+    // Wait for the socket broadcast with timeout
+    const data = await Promise.race([
+      memberLeftPromise,
+      new Promise((_, reject) =>
+        setTimeout(() => reject(new Error('Timeout waiting for member-left event')), 2000)
+      ),
+    ])
+
+    // Verify the broadcast data
+    expect(data).toBeDefined()
+    expect(data.roomId).toBe(testRoomId)
+    expect(data.userId).toBe(testGuestId2)
+    expect(data.members).toBeDefined()
+    expect(Array.isArray(data.members)).toBe(true)
+
+    // Verify User 2 is no longer in the members list
+    const memberUserIds = data.members.map((m: any) => m.userId)
+    expect(memberUserIds).toContain(testGuestId1)
+    expect(memberUserIds).not.toContain(testGuestId2)
+  })
+
+  it('should update both members and players lists in member-joined broadcast', async () => {
+    // Create an active player for User 2
+    const [player2] = await db
+      .insert(schema.players)
+      .values({
+        userId: testUserId2,
+        name: 'Player 2',
+        emoji: '🎮',
+        color: '#3b82f6',
+        isActive: true,
+      })
+      .returning()
+
+    // User 1 connects and joins room
+    socket1 = ioClient(`http://localhost:${serverPort}`, {
+      path: '/api/socket',
+      transports: ['websocket'],
+    })
+
+    await new Promise<void>((resolve) => {
+      socket1.on('connect', () => resolve())
+    })
+
+    socket1.emit('join-room', { roomId: testRoomId, userId: testGuestId1 })
+
+    await new Promise<void>((resolve) => {
+      socket1.on('room-joined', () => resolve())
+    })
+
+    const memberJoinedPromise = new Promise<any>((resolve) => {
+      socket1.on('member-joined', (data) => {
+        resolve(data)
+      })
+    })
+
+    // User 2 joins via API
+    await addRoomMember({
+      roomId: testRoomId,
+      userId: testGuestId2,
+      displayName: 'User 2',
+      isCreator: false,
+    })
+
+    // Manually trigger the broadcast (simulating what the API does)
+    const { getRoomMembers: getRoomMembers3 } = await import('../src/lib/arcade/room-membership')
+    const { getRoomActivePlayers: getRoomActivePlayers3 } = await import(
+      '../src/lib/arcade/player-manager'
+    )
+
+    const members2 = await getRoomMembers3(testRoomId)
+    const memberPlayers2 = await getRoomActivePlayers3(testRoomId)
+
+    const memberPlayersObj2: Record<string, any[]> = {}
+    for (const [uid, players] of memberPlayers2.entries()) {
+      memberPlayersObj2[uid] = players
+    }
+
+    io.to(`room:${testRoomId}`).emit('member-joined', {
+      roomId: testRoomId,
+      userId: testGuestId2,
+      members: members2,
+      memberPlayers: memberPlayersObj2,
+    })
+
+    const data = await Promise.race([
+      memberJoinedPromise,
+      new Promise((_, reject) => setTimeout(() => reject(new Error('Timeout')), 2000)),
+    ])
+
+    // Verify members list is updated
+    expect(data.members).toBeDefined()
+    const memberUserIds = data.members.map((m: any) => m.userId)
+    expect(memberUserIds).toContain(testGuestId2)
+
+    // Verify players list is updated
+    expect(data.memberPlayers).toBeDefined()
+    expect(data.memberPlayers[testGuestId2]).toBeDefined()
+    expect(Array.isArray(data.memberPlayers[testGuestId2])).toBe(true)
+
+    // User 2's players should include the active player we created
+    const user2Players = data.memberPlayers[testGuestId2]
+    expect(user2Players.length).toBeGreaterThan(0)
+    expect(user2Players.some((p: any) => p.id === player2.id)).toBe(true)
+
+    // Clean up player
+    await db.delete(schema.players).where(eq(schema.players.id, player2.id))
+  })
+})

apps/web/biome.jsonc

@@ -0,0 +1,69 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.2.5/schema.json",
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space",
+    "indentWidth": 2,
+    "lineWidth": 100
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true,
+      "a11y": {
+        "useButtonType": "off",
+        "noSvgWithoutTitle": "off",
+        "noLabelWithoutControl": "off",
+        "noStaticElementInteractions": "off",
+        "useKeyWithClickEvents": "off",
+        "useSemanticElements": "off"
+      },
+      "suspicious": {
+        "noExplicitAny": "off",
+        "noArrayIndexKey": "off",
+        "noImplicitAnyLet": "off",
+        "noAssignInExpressions": "off",
+        "useIterableCallbackReturn": "off"
+      },
+      "style": {
+        "useNodejsImportProtocol": "off",
+        "noNonNullAssertion": "off",
+        "noDescendingSpecificity": "off"
+      },
+      "correctness": {
+        "noUnusedVariables": "off",
+        "noUnusedFunctionParameters": "off",
+        "useUniqueElementIds": "off",
+        "noChildrenProp": "off",
+        "useExhaustiveDependencies": "off",
+        "noInvalidUseBeforeDeclaration": "off",
+        "useHookAtTopLevel": "off",
+        "noNestedComponentDefinitions": "off",
+        "noUnreachable": "off"
+      },
+      "security": {
+        "noDangerouslySetInnerHtml": "off"
+      },
+      "performance": {
+        "noAccumulatingSpread": "off"
+      }
+    }
+  },
+  "files": {
+    "ignoreUnknown": true
+  },
+  "vcs": {
+    "enabled": true,
+    "clientKind": "git",
+    "useIgnoreFile": true,
+    "defaultBranch": "main"
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "single",
+      "jsxQuoteStyle": "double",
+      "semicolons": "asNeeded",
+      "trailingCommas": "es5"
+    }
+  }
+}

apps/web/docs/FIXES-APPLIED.md

@@ -0,0 +1,169 @@
+# User/Player/Room Member Inconsistencies - FIXED ✅
+
+All critical inconsistencies between users, players, and room members have been resolved.
+
+## Summary of Fixes
+
+### 1. ✅ Backend - Player Fetching
+
+**Created**: `src/lib/arcade/player-manager.ts`
+- `getActivePlayers(userId)` - Get a user's active players
+- `getRoomActivePlayers(roomId)` - Get all active players for all members in a room
+- `getRoomPlayerIds(roomId)` - Get flat list of all player IDs in a room
+- `validatePlayerInRoom(playerId, roomId)` - Validate player belongs to room member
+- `getPlayer(playerId)` - Get single player by ID
+- `getPlayers(playerIds[])` - Get multiple players by IDs
+
+### 2. ✅ API Endpoints Updated
+
+**`/api/arcade/rooms/:roomId/join` (POST)**
+```typescript
+// Now returns:
+{
+  member: RoomMember,
+  room: Room,
+  activePlayers: Player[], // USER's active players
+  alreadyMember: boolean
+}
+```
+
+**`/api/arcade/rooms/:roomId` (GET)**
+```typescript
+// Now returns:
+{
+  room: Room,
+  members: RoomMember[],
+  memberPlayers: Record<userId, Player[]>, // Map of all members' players
+  canModerate: boolean
+}
+```
+
+**`/api/arcade/rooms` (GET)**
+```typescript
+// Now returns:
+{
+  rooms: Array<{
+    ...roomData,
+    memberCount: number,  // Number of users in room
+    playerCount: number   // Total players across all users
+  }>
+}
+```
+
+### 3. ✅ Socket Events Updated
+
+**`join-room` event**
+```typescript
+// Server emits:
+socket.emit('room-joined', {
+  room,
+  members,
+  onlineMembers,
+  memberPlayers: Record<userId, Player[]>,  // All members' players
+  activePlayers: Player[]  // This user's active players
+})
+
+socket.to(`room:${roomId}`).emit('member-joined', {
+  member,
+  activePlayers: Player[],  // New member's active players
+  onlineMembers,
+  memberPlayers: Record<userId, Player[]>
+})
+```
+
+**`room-game-move` event**
+```typescript
+// Now validates:
+1. User is a room member (userId check)
+2. Player belongs to a room member (playerId validation)
+
+// Rejects move if playerId doesn't belong to any room member
+```
+
+### 4. ✅ Frontend UI Updated
+
+**Room Lobby (`/arcade/rooms/[roomId]/page.tsx`)**
+
+Before:
+```
+Member: Jane
+  Status: Online
+```
+
+After:
+```
+Member: Jane
+  Status: Online
+  Players: 👧 Alice, 👦 Bob
+```
+
+**Room Browser (`/arcade/rooms/page.tsx`)**
+
+Before:
+```
+Room: Math Masters
+  Host: Jane | Game: matching | Status: Waiting
+```
+
+After:
+```
+Room: Math Masters
+  Host: Jane | Game: matching | 👥 3 members | 🎯 7 players | Status: Waiting
+```
+
+## Key Changes Summary
+
+| Component | Change |
+|-----------|--------|
+| **Helper Functions** | Created `player-manager.ts` with 6 new functions |
+| **Join Endpoint** | Now fetches and returns user's active players |
+| **Room Detail Endpoint** | Returns player map for all members |
+| **Rooms List Endpoint** | Returns member and player counts |
+| **Socket join-room** | Broadcasts active players to room |
+| **Socket room-game-move** | Validates player IDs belong to members |
+| **Room Lobby UI** | Shows each member's players |
+| **Room Browser UI** | Shows total member and player counts |
+
+## Validation Rules Enforced
+
+1. ✅ **Room membership tracked by USER ID** - Correct
+2. ✅ **Game participation tracked by PLAYER IDs** - Fixed
+3. ✅ **When user joins room, their active players join game** - Implemented
+4. ✅ **Socket moves validate player belongs to room** - Added validation
+5. ✅ **UI shows both members and their players** - Updated
+
+## TypeScript Validation
+
+All changes pass TypeScript validation with 0 errors in modified files:
+- `src/lib/arcade/player-manager.ts` ✅
+- `src/app/api/arcade/rooms/route.ts` ✅
+- `src/app/api/arcade/rooms/[roomId]/route.ts` ✅
+- `src/app/api/arcade/rooms/[roomId]/join/route.ts` ✅
+- `src/app/arcade/rooms/page.tsx` ✅
+- `src/app/arcade/rooms/[roomId]/page.tsx` ✅
+- `socket-server.ts` ✅
+
+## Testing Checklist
+
+- [ ] Create a user with multiple active players
+- [ ] Join a room and verify all active players are shown
+- [ ] Have multiple users join the same room
+- [ ] Verify each user's players are displayed correctly
+- [ ] Verify room browser shows correct member/player counts
+- [ ] Start a game and verify all player IDs are collected
+- [ ] Test that invalid player IDs are rejected in game moves
+
+## Documentation Created
+
+1. `docs/terminology-user-player-room.md` - Complete explanation
+2. `.claude/terminology.md` - Quick reference for AI
+3. `docs/INCONSISTENCIES.md` - Analysis of issues (pre-fix)
+4. `docs/FIXES-APPLIED.md` - This document
+
+## Next Steps (Phase 4)
+
+The system is now ready for full multiplayer game integration:
+1. When room game starts, collect all player IDs from all members
+2. Set `arcade_sessions.activePlayers` to all room player IDs
+3. Game state tracks scores/moves by PLAYER ID
+4. Broadcast game updates to all room members

apps/web/docs/INCONSISTENCIES.md

@@ -0,0 +1,189 @@
+# Current Implementation vs Correct Design - Inconsistencies
+
+## ❌ Inconsistency 1: Room Join Doesn't Fetch Active Players
+
+**Current Code** (`/api/arcade/rooms/:roomId/join`):
+```typescript
+// Only creates room_member record with userId
+const member = await addRoomMember({
+  roomId,
+  userId: viewerId,  // ✅ Correct: USER ID
+  displayName,
+  isCreator: false,
+})
+// ❌ Missing: Does not fetch user's active players
+```
+
+**Should Be**:
+```typescript
+// 1. Create room member
+const member = await addRoomMember({ ... })
+
+// 2. Fetch user's active players
+const activePlayers = await db.query.players.findMany({
+  where: and(
+    eq(players.userId, viewerId),
+    eq(players.isActive, true)
+  )
+})
+
+// 3. Return both member and their active players
+return { member, activePlayers }
+```
+
+---
+
+## ❌ Inconsistency 2: Socket Events Use USER ID Instead of PLAYER ID
+
+**Current Code** (`socket-server.ts`):
+```typescript
+socket.on('join-room', ({ roomId, userId }) => {
+  // Uses USER ID for presence
+  await setMemberOnline(roomId, userId, true)
+  socket.emit('room-joined', { members })
+})
+
+socket.on('room-game-move', ({ roomId, userId, move }) => {
+  // ❌ Wrong: Uses USER ID for game moves
+  // Should use PLAYER ID
+})
+```
+
+**Should Be**:
+```typescript
+socket.on('join-room', ({ roomId, userId }) => {
+  // ✅ Correct: Use USER ID for room presence
+  await setMemberOnline(roomId, userId, true)
+
+  // ❌ Missing: Should also fetch and broadcast active players
+  const activePlayers = await getActivePlayers(userId)
+  socket.emit('room-joined', { members, activePlayers })
+})
+
+socket.on('room-game-move', ({ roomId, playerId, move }) => {
+  // ✅ Correct: Use PLAYER ID for game actions
+  // Validate that playerId belongs to a member in this room
+})
+```
+
+---
+
+## ❌ Inconsistency 3: Room Member Interface Missing Player Association
+
+**Current Code** (`room_members` table):
+```typescript
+interface RoomMember {
+  id: string
+  roomId: string
+  userId: string       // ✅ Correct: USER ID
+  displayName: string
+  isCreator: boolean
+  // ❌ Missing: No link to user's players
+}
+```
+
+**Need to Add** (runtime association, not DB schema):
+```typescript
+interface RoomMemberWithPlayers {
+  member: RoomMember
+  activePlayers: Player[]  // The user's active players
+}
+```
+
+---
+
+## ❌ Inconsistency 4: Client UI Shows Room Members, Not Players
+
+**Current Code** (`/arcade/rooms/[roomId]/page.tsx`):
+```typescript
+// Shows room members (users)
+{members.map((member) => (
+  <div key={member.id}>
+    {member.displayName} {/* USER's display name */}
+  </div>
+))}
+
+// ❌ Missing: Should show the PLAYERS that will participate
+```
+
+**Should Show**:
+```typescript
+{members.map((member) => (
+  <div key={member.id}>
+    <div>{member.displayName} (Room Member)</div>
+    <div>Players:
+      {member.activePlayers.map(player => (
+        <span key={player.id}>{player.emoji} {player.name}</span>
+      ))}
+    </div>
+  </div>
+))}
+```
+
+---
+
+## Summary of Required Changes
+
+### Phase 1: Backend - Player Fetching
+1. ✅ `room_members` table correctly uses USER ID (no change needed)
+2. ❌ `/api/arcade/rooms/:roomId/join` - Fetch and return active players
+3. ❌ `/api/arcade/rooms/:roomId` GET - Include active players in response
+4. ❌ Create helper: `getActivePlayers(userId) => Player[]`
+
+### Phase 2: Socket Layer - Player Association
+1. ❌ `join-room` event - Broadcast active players to room
+2. ❌ `room-game-move` event - Accept PLAYER ID, not USER ID
+3. ❌ Validate PLAYER ID belongs to a room member
+
+### Phase 3: Frontend - Player Display
+1. ❌ Room lobby - Show each member's active players
+2. ❌ Game setup - Use PLAYER IDs for `activePlayers` array
+3. ❌ Move/action events - Send PLAYER ID
+
+### Phase 4: Game Integration
+1. ❌ When room game starts, collect all PLAYER IDs from all members
+2. ❌ Arcade session `activePlayers` should contain all room PLAYER IDs
+3. ❌ Game state tracks scores/moves by PLAYER ID, not USER ID
+
+---
+
+## Test Scenarios
+
+### Scenario 1: Single Player Per User
+```
+USER Jane (guest_123)
+  └─ PLAYER Alice (active)
+
+Joins room → Room shows "Jane: Alice 👧"
+Game starts → activePlayers: ["alice_id"]
+```
+
+### Scenario 2: Multiple Players Per User
+```
+USER Jane (guest_123)
+  ├─ PLAYER Alice (active)
+  └─ PLAYER Bob (active)
+
+Joins room → Room shows "Jane: Alice 👧, Bob 👦"
+Game starts → activePlayers: ["alice_id", "bob_id"]
+```
+
+### Scenario 3: Multi-User Room
+```
+USER Jane
+  └─ PLAYER Alice, Bob (active)
+
+USER Mark
+  └─ PLAYER Mario (active)
+
+USER Sara
+  └─ PLAYER Luna, Nova, Star (active)
+
+Room shows:
+  - Jane: Alice 👧, Bob 👦
+  - Mark: Mario 🍄
+  - Sara: Luna 🌙, Nova ✨, Star ⭐
+
+Game starts → activePlayers: [alice, bob, mario, luna, nova, star]
+Total: 6 players across 3 users
+```

apps/web/docs/MULTIPLAYER_SYNC_ARCHITECTURE.md

@@ -0,0 +1,490 @@
+# Multiplayer Synchronization Architecture
+
+## Current State: Single-User Multi-Tab Sync
+
+### How it Works
+
+**Client-Side Flow:**
+
+1. User opens game in Tab A and Tab B
+2. Both tabs create WebSocket connections via `useArcadeSocket()`
+3. Both emit `join-arcade-session` with `userId`
+4. Server adds both sockets to `arcade:${userId}` room
+
+**When User Makes a Move (from Tab A):**
+
+```typescript
+// Client (Tab A)
+sendMove({ type: 'FLIP_CARD', playerId: 'player-1', data: { cardId: 'card-5' } })
+
+// Optimistic update applied locally
+state = applyMoveOptimistically(state, move)
+
+// Socket emits to server
+socket.emit('game-move', { userId, move })
+```
+
+**Server Processing:**
+
+```typescript
+// socket-server.ts line 71
+socket.on('game-move', async (data) => {
+  // Validate move
+  const result = await applyGameMove(data.userId, data.move)
+
+  if (result.success) {
+    // ✅ Broadcast to ALL tabs of this user
+    io.to(`arcade:${data.userId}`).emit('move-accepted', {
+      gameState: result.session.gameState,
+      version: result.session.version,
+      move: data.move
+    })
+  }
+})
+```
+
+**Both Tabs Receive Update:**
+
+```typescript
+// Client (Tab A and Tab B)
+socket.on('move-accepted', (data) => {
+  // Update server state
+  optimistic.handleMoveAccepted(data.gameState, data.version, data.move)
+
+  // Tab A: Remove from pending queue (was optimistic)
+  // Tab B: Just sync with server state (wasn't expecting it)
+})
+```
+
+### Key Components
+
+1. **`useOptimisticGameState`** - Manages optimistic updates
+   - Keeps `serverState` (last confirmed by server)
+   - Keeps `pendingMoves[]` (not yet confirmed)
+   - Current state = serverState + all pending moves applied
+
+2. **`useArcadeSession`** - Combines socket + optimistic state
+   - Connects socket
+   - Applies moves optimistically
+   - Sends moves to server
+   - Handles server responses
+
+3. **Socket Rooms** - Server-side broadcast channels
+   - `arcade:${userId}` - All tabs of one user
+   - Each socket can be in multiple rooms
+   - `io.to(room).emit()` broadcasts to all sockets in that room
+
+4. **Session Storage** - Database
+   - One session per user (userId is unique key)
+   - Contains `gameState`, `version`, `roomId`
+   - Optimistic locking via version number
+
+---
+
+## Required: Room-Based Multi-User Sync
+
+### The Goal
+
+Multiple users in the same room at `/arcade/room` should all see synchronized game state:
+
+- User A (2 tabs): Tab A1, Tab A2
+- User B (1 tab): Tab B1
+- User C (2 tabs): Tab C1, Tab C2
+
+When User A makes a move in Tab A1:
+- **All of User A's tabs** see the move (Tab A1, Tab A2)
+- **All of User B's tabs** see the move (Tab B1)
+- **All of User C's tabs** see the move (Tab C1, Tab C2)
+
+### The Challenge
+
+Current architecture only broadcasts within one user:
+```typescript
+// ❌ Only reaches User A's tabs
+io.to(`arcade:${userA}`).emit('move-accepted', ...)
+```
+
+We need to broadcast to the entire room:
+```typescript
+// ✅ Reaches all users in the room
+io.to(`game:${roomId}`).emit('move-accepted', ...)
+```
+
+### The Solution
+
+#### 1. Add Room-Based Game Socket Room
+
+When a user joins `/arcade/room`, they join TWO socket rooms:
+
+```typescript
+// socket-server.ts - extend join-arcade-session
+socket.on('join-arcade-session', async ({ userId, roomId }) => {
+  // Join user's personal room (for multi-tab sync)
+  socket.join(`arcade:${userId}`)
+
+  // If this session is part of a room, also join the game room
+  if (roomId) {
+    socket.join(`game:${roomId}`)
+    console.log(`🎮 User ${userId} joined game room ${roomId}`)
+  }
+
+  // Send current session state...
+})
+```
+
+#### 2. Broadcast to Both Rooms
+
+When processing moves for room-based sessions:
+
+```typescript
+// socket-server.ts - modify game-move handler
+socket.on('game-move', async (data) => {
+  const result = await applyGameMove(data.userId, data.move)
+
+  if (result.success && result.session) {
+    const moveAcceptedData = {
+      gameState: result.session.gameState,
+      version: result.session.version,
+      move: data.move,
+    }
+
+    // Broadcast to user's own tabs (for optimistic update reconciliation)
+    io.to(`arcade:${data.userId}`).emit('move-accepted', moveAcceptedData)
+
+    // If this is a room-based session, ALSO broadcast to all room members
+    if (result.session.roomId) {
+      io.to(`game:${result.session.roomId}`).emit('move-accepted', moveAcceptedData)
+      console.log(`📢 Broadcasted move to room ${result.session.roomId}`)
+    }
+  }
+})
+```
+
+**Why broadcast to both?**
+- `arcade:${userId}` - So the acting user's tabs can reconcile their optimistic updates
+- `game:${roomId}` - So all other users in the room receive the update
+
+#### 3. Client Handles Own vs. Other Moves
+
+The client already handles this correctly via optimistic updates:
+
+```typescript
+// User A (Tab A1) - Makes move
+sendMove({ type: 'FLIP_CARD', ... })
+// → Applies optimistically immediately
+// → Sends to server
+// → Receives move-accepted
+// → Reconciles: removes from pending queue
+
+// User B (Tab B1) - Sees move from User A
+// → Receives move-accepted (unexpected)
+// → Reconciles: clears pending queue, syncs with server state
+// → Result: sees User A's move immediately
+```
+
+The beauty is that `handleMoveAccepted()` already handles both cases:
+- **Own move**: Remove from pending queue
+- **Other's move**: Clear pending queue (since server state is now ahead)
+
+#### 4. Pass roomId in join-arcade-session
+
+Client needs to send roomId when joining:
+
+```typescript
+// hooks/useArcadeSocket.ts
+const joinSession = useCallback((userId: string, roomId?: string) => {
+  if (!socket) return
+  socket.emit('join-arcade-session', { userId, roomId })
+}, [socket])
+
+// hooks/useArcadeSession.ts
+useEffect(() => {
+  if (connected && autoJoin && userId) {
+    // Get roomId from session or room context
+    const roomId = getRoomId() // Need to provide this
+    joinSession(userId, roomId)
+  }
+}, [connected, autoJoin, userId, joinSession])
+```
+
+---
+
+## Implementation Plan
+
+### Phase 1: Server-Side Changes
+
+**File: `socket-server.ts`**
+
+1. ✅ Accept `roomId` in `join-arcade-session` event
+   ```typescript
+   socket.on('join-arcade-session', async ({ userId, roomId }) => {
+     socket.join(`arcade:${userId}`)
+
+     // Join game room if session is room-based
+     if (roomId) {
+       socket.join(`game:${roomId}`)
+     }
+
+     // Rest of logic...
+   })
+   ```
+
+2. ✅ Broadcast to room in `game-move` handler
+   ```typescript
+   if (result.success && result.session) {
+     const moveData = {
+       gameState: result.session.gameState,
+       version: result.session.version,
+       move: data.move,
+     }
+
+     // Broadcast to user's tabs
+     io.to(`arcade:${data.userId}`).emit('move-accepted', moveData)
+
+     // ALSO broadcast to room if room-based session
+     if (result.session.roomId) {
+       io.to(`game:${result.session.roomId}`).emit('move-accepted', moveData)
+     }
+   }
+   ```
+
+3. ✅ Handle room disconnects
+   ```typescript
+   socket.on('disconnect', () => {
+     // Leave all rooms (handled automatically by socket.io)
+     // But log for debugging
+     if (currentUserId && currentRoomId) {
+       console.log(`User ${currentUserId} left game room ${currentRoomId}`)
+     }
+   })
+   ```
+
+### Phase 2: Client-Side Changes
+
+**File: `hooks/useArcadeSocket.ts`**
+
+1. ✅ Add roomId parameter to joinSession
+   ```typescript
+   export interface UseArcadeSocketReturn {
+     // ... existing
+     joinSession: (userId: string, roomId?: string) => void
+   }
+
+   const joinSession = useCallback((userId: string, roomId?: string) => {
+     if (!socket) return
+     socket.emit('join-arcade-session', { userId, roomId })
+   }, [socket])
+   ```
+
+**File: `hooks/useArcadeSession.ts`**
+
+2. ✅ Accept roomId in options
+   ```typescript
+   export interface UseArcadeSessionOptions<TState> {
+     userId: string
+     roomId?: string // NEW
+     initialState: TState
+     applyMove: (state: TState, move: GameMove) => TState
+     // ... rest
+   }
+
+   export function useArcadeSession<TState>(options: UseArcadeSessionOptions<TState>) {
+     const { userId, roomId, ...optimisticOptions } = options
+
+     // Auto-join with roomId
+     useEffect(() => {
+       if (connected && autoJoin && userId) {
+         joinSession(userId, roomId)
+       }
+     }, [connected, autoJoin, userId, roomId, joinSession])
+
+     // ... rest
+   }
+   ```
+
+**File: `app/arcade/matching/context/ArcadeMemoryPairsContext.tsx`**
+
+3. ✅ Get roomId from room data and pass to session
+   ```typescript
+   import { useRoomData } from '@/hooks/useRoomData'
+
+   export function ArcadeMemoryPairsProvider({ children }: { children: ReactNode }) {
+     const { data: viewerId } = useViewerId()
+     const { roomData } = useRoomData()
+
+     // Arcade session integration
+     const { state, sendMove, ... } = useArcadeSession<MemoryPairsState>({
+       userId: viewerId || '',
+       roomId: roomData?.id, // NEW - pass room ID
+       initialState,
+       applyMove: applyMoveOptimistically,
+     })
+
+     // ... rest stays the same
+   }
+   ```
+
+### Phase 3: Testing
+
+1. **Multi-Tab Test (Single User)**
+   - Open `/arcade/room` in 2 tabs as User A
+   - Make move in Tab 1
+   - Verify Tab 2 updates immediately
+
+2. **Multi-User Test (Different Users)**
+   - User A opens `/arcade/room` in 1 tab
+   - User B opens `/arcade/room` in 1 tab (same room)
+   - User A makes move
+   - Verify User B sees move immediately
+
+3. **Multi-User Multi-Tab Test**
+   - User A: 2 tabs (Tab A1, Tab A2)
+   - User B: 2 tabs (Tab B1, Tab B2)
+   - User A makes move in Tab A1
+   - Verify all 4 tabs update
+
+4. **Rapid Move Test**
+   - User A and User B both make moves rapidly
+   - Verify no conflicts
+   - Verify all moves are processed in order
+
+---
+
+## Edge Cases to Handle
+
+### 1. User Leaves Room Mid-Game
+
+**Current behavior:** Session persists, user can rejoin
+
+**Required behavior:**
+- If user leaves room (HTTP POST to `/api/arcade/rooms/[roomId]/leave`):
+  - Delete their session
+  - Emit `session-ended` to their tabs
+  - Other users continue playing
+
+### 2. Version Conflicts
+
+**Already handled** by optimistic locking:
+- Each move increments version
+- Client tracks server version
+- If conflict detected, reconciliation happens automatically
+
+### 3. Session Without Room
+
+**Already handled** by session-manager.ts:
+- Sessions without `roomId` are considered orphaned
+- They're cleaned up on next access (lines 111-115)
+
+### 4. Multiple Users Same Move
+
+**Handled by server validation:**
+- Server processes moves sequentially
+- First valid move wins
+- Second move gets rejected if it's now invalid
+- Client rolls back rejected move
+
+---
+
+## Benefits of This Architecture
+
+1. **Reuses existing optimistic update system**
+   - No changes needed to client-side optimistic logic
+   - Already handles own vs. others' moves
+
+2. **Minimal changes required**
+   - Add `roomId` parameter (3 places)
+   - Add one `io.to()` broadcast (1 place)
+   - Wire up roomId from context (1 place)
+
+3. **Backward compatible**
+   - Non-room sessions still work (roomId is optional)
+   - Solo play unaffected
+
+4. **Scalable**
+   - Socket.io handles multiple rooms efficiently
+   - No N² broadcasting (room-based is O(N))
+
+5. **Already tested pattern**
+   - Multi-tab sync proves the broadcast pattern works
+   - Just extending to more sockets (different users)
+
+---
+
+## Security Considerations
+
+### 1. Validate Room Membership
+
+Before processing moves, verify user is in the room:
+
+```typescript
+// session-manager.ts - in applyGameMove()
+const session = await getArcadeSession(userId)
+
+if (session.roomId) {
+  // Verify user is a member of this room
+  const membership = await getRoomMember(session.roomId, userId)
+  if (!membership) {
+    return { success: false, error: 'User not in room' }
+  }
+}
+```
+
+### 2. Verify Player Ownership
+
+Ensure users can only make moves for their own players:
+
+```typescript
+// Already handled in validator
+// move.playerId must be in session.activePlayers
+// activePlayers are owned by the userId making the move
+```
+
+This is already enforced by how activePlayers are set up in the room.
+
+---
+
+## Performance Considerations
+
+### 1. Broadcasting Overhead
+
+- **Current**: 1 user × N tabs = N broadcasts per move
+- **New**: M users × N tabs each = (M×N) broadcasts per move
+- **Impact**: Linear with room size, not quadratic
+- **Acceptable**: Socket.io is optimized for this
+
+### 2. Database Queries
+
+- No change: Still 1 database write per move
+- Session is stored per-user, not per-room
+- Room data is separate (cached, not updated per move)
+
+### 3. Memory
+
+- Each socket joins 2 rooms instead of 1
+- Negligible: Socket.io uses efficient room data structures
+
+---
+
+## Testing Checklist
+
+### Unit Tests
+
+- [ ] `useArcadeSocket` accepts and passes roomId
+- [ ] `useArcadeSession` accepts and passes roomId
+- [ ] Server joins `game:${roomId}` room when roomId provided
+
+### Integration Tests
+
+- [ ] Single user, 2 tabs: both tabs sync
+- [ ] 2 users, 1 tab each: both users sync
+- [ ] 2 users, 2 tabs each: all 4 tabs sync
+- [ ] User leaves room: session deleted, others continue
+- [ ] Rapid concurrent moves: all processed correctly
+
+### Manual Tests
+
+- [ ] Open room in 2 browsers (different users)
+- [ ] Play full game to completion
+- [ ] Verify scores sync correctly
+- [ ] Verify turn changes sync correctly
+- [ ] Verify game completion syncs correctly

apps/web/docs/arcade-rooms-implementation-tasks.md

@@ -0,0 +1,109 @@
+# Arcade Rooms Implementation Task List
+
+This is the detailed implementation task list for the arcade rooms feature. Use this to restore the TodoWrite list if the session is interrupted.
+
+## Phase 1: Database & API Foundation
+
+- [ ] Phase 1.1: Create database migration for arcade_rooms and room_members tables
+- [ ] Phase 1.2: Implement room-manager.ts with CRUD operations (create, get, update, delete)
+- [ ] Phase 1.3: Implement room-membership.ts for member management
+- [ ] Phase 1.4: Build API endpoints for room CRUD (/api/arcade/rooms/*)
+- [ ] Phase 1.5: Add room code generation utility
+- [ ] Phase 1.6: Implement TTL cleanup system for rooms
+
+### Testing Checkpoint 1
+- [ ] TESTING CHECKPOINT 1: Write unit tests for all room manager functions
+- [ ] TESTING CHECKPOINT 1: Write unit tests for room membership functions
+- [ ] TESTING CHECKPOINT 1: Write API endpoint tests for room CRUD operations
+- [ ] TESTING CHECKPOINT 1: Manual testing of room creation, joining, and TTL cleanup
+
+## Phase 2: Socket.IO Integration
+
+- [ ] Phase 2.1: Update socket-server.ts for room namespacing
+- [ ] Phase 2.2: Implement room-scoped broadcasts in socket handlers
+- [ ] Phase 2.3: Add presence tracking for room members
+- [ ] Phase 2.4: Update session-manager.ts to support roomId
+- [ ] Phase 2.5: Update game state sync to respect room boundaries
+
+### Testing Checkpoint 2
+- [ ] TESTING CHECKPOINT 2: Write integration tests for multi-user room sessions
+- [ ] TESTING CHECKPOINT 2: Write tests for room-scoped broadcasts
+- [ ] TESTING CHECKPOINT 2: Manual testing of multi-tab synchronization within rooms
+- [ ] TESTING CHECKPOINT 2: Verify backward compatibility with solo play (no roomId)
+
+## Phase 3: Guest User System
+
+- [ ] Phase 3.1: Implement guest ID generation and storage
+- [ ] Phase 3.2: Create useGuestUser hook for guest authentication
+- [ ] Phase 3.3: Update auth flow to support optional guest access
+- [ ] Phase 3.4: Update API endpoints to accept guest user IDs
+
+### Testing Checkpoint 3
+- [ ] TESTING CHECKPOINT 3: Write unit tests for guest ID system
+- [ ] TESTING CHECKPOINT 3: Manual testing of guest join flow
+- [ ] TESTING CHECKPOINT 3: Test guest user persistence across page refreshes
+
+## Phase 4: UI Components
+
+- [ ] Phase 4.1: Build CreateRoomDialog component with form validation
+- [ ] Phase 4.2: Build RoomLobby component showing current room state
+- [ ] Phase 4.3: Build RoomLobbyBrowser for public room discovery
+- [ ] Phase 4.4: Add RoomContextIndicator to navigation bar
+- [ ] Phase 4.5: Wire up useRoom and useRoomMembership hooks
+- [ ] Phase 4.6: Implement player selection UI when joining room
+
+### Testing Checkpoint 4
+- [ ] TESTING CHECKPOINT 4: Write component unit tests for all room UI components
+- [ ] TESTING CHECKPOINT 4: Manual UI testing of room creation flow
+- [ ] TESTING CHECKPOINT 4: Manual UI testing of room browser and filtering
+- [ ] TESTING CHECKPOINT 4: Test player selection flow when joining rooms
+
+## Phase 5: Routes & Navigation
+
+- [ ] Phase 5.1: Create /arcade/rooms route structure
+- [ ] Phase 5.2: Create /arcade/rooms/:roomId route with room lobby
+- [ ] Phase 5.3: Create /arcade/rooms/:roomId/:game routes for in-room gameplay
+- [ ] Phase 5.4: Update arcade home to include room access entry points
+- [ ] Phase 5.5: Add room selector/switcher to navigation
+- [ ] Phase 5.6: Implement join-by-code flow with code input dialog
+- [ ] Phase 5.7: Add share room functionality (copy link, share code)
+
+### Testing Checkpoint 5
+- [ ] TESTING CHECKPOINT 5: Write E2E tests for room creation navigation flow
+- [ ] TESTING CHECKPOINT 5: Write E2E tests for join-by-URL flow
+- [ ] TESTING CHECKPOINT 5: Write E2E tests for join-by-code flow
+- [ ] TESTING CHECKPOINT 5: Manual testing of room navigation across different states
+
+## Phase 6: Final Testing & Polish
+
+- [ ] Phase 6.1: Write E2E tests for complete room creation and join flow
+- [ ] Phase 6.2: Write E2E tests for multi-user gameplay in rooms
+- [ ] Phase 6.3: Write tests for TTL expiration and cleanup behavior
+- [ ] Phase 6.4: Write E2E tests for guest user complete flow
+- [ ] Phase 6.5: Write tests for room creator permissions (kick, lock, delete)
+- [ ] Phase 6.6: Performance testing with multiple concurrent rooms
+- [ ] Phase 6.7: Performance testing with many users in single room
+- [ ] Phase 6.8: Add error states and loading states to all UI components
+- [ ] Phase 6.9: Add user feedback toasts for room operations
+- [ ] Phase 6.10: Final manual user testing of complete room system
+- [ ] Phase 6.11: Cross-browser testing (Chrome, Firefox, Safari)
+- [ ] Phase 6.12: Mobile responsiveness testing for room UI
+
+---
+
+## Notes
+
+- Total: 62 tasks across 6 phases
+- 20 dedicated testing tasks (32% of total)
+- Reference: `/Users/antialias/projects/soroban-abacus-flashcards/apps/web/docs/arcade-rooms-technical-plan.md`
+
+## Restoring TodoWrite
+
+To restore this list to TodoWrite format, convert each task to:
+```json
+{
+  "content": "Task description",
+  "status": "pending|in_progress|completed",
+  "activeForm": "Present continuous form (e.g., 'Creating...')"
+}
+```

apps/web/docs/arcade-rooms-technical-plan.md

@@ -0,0 +1,895 @@
+# 🎮 Arcade Room System - Complete Technical Plan
+
+**Date:** 2025-01-06
+**Status:** Ready for Implementation
+
+## Executive Summary
+
+Transform the current singleton arcade session into a multi-room system where users can create, manage, and share public game rooms. Rooms are URL-addressable, support guest users, have configurable TTL, and give creators full moderation control.
+
+---
+
+## 1. Core Requirements
+
+### Room Features
+- ✅ **Public by default** - All rooms visible in public lobby
+- ✅ **No capacity limits** - Unlimited players per room
+- ✅ **Configurable TTL** - Rooms expire based on inactivity (similar to existing session TTL)
+- ✅ **URL-addressable** - Direct links to join rooms (`/arcade/rooms/{roomId}`)
+- ✅ **Guest access** - Unauthenticated users can join with temp guest IDs
+- ✅ **Anyone can create** - No authentication required to create rooms
+- ✅ **Creator moderation** - Only room creator can kick, lock, or delete room
+
+---
+
+## 2. Database Schema
+
+### New Tables
+
+```typescript
+// arcade_rooms table
+interface ArcadeRoom {
+  id: string                    // UUID - primary key
+  code: string                  // 6-char join code (e.g., "ABC123") - unique
+  name: string                  // User-defined room name (max 50 chars)
+
+  // Creator info
+  createdBy: string             // User/guest ID of creator
+  creatorName: string           // Display name at creation time
+  createdAt: Date
+
+  // Lifecycle
+  lastActivity: Date            // Updated on any room activity
+  ttlMinutes: number            // Time to live in minutes (default: 60)
+  isLocked: boolean             // Creator can lock room (no new joins)
+
+  // Game configuration
+  gameName: string              // 'matching', 'complement-race', etc.
+  gameConfig: JSON              // Game-specific settings (difficulty, etc.)
+
+  // Current state
+  status: 'lobby' | 'playing' | 'finished'
+  currentSessionId: string | null // FK to arcade_sessions (when game active)
+
+  // Metadata
+  totalGamesPlayed: number      // Track room usage
+}
+
+// room_members table
+interface RoomMember {
+  id: string                    // UUID - primary key
+  roomId: string                // FK to arcade_rooms - indexed
+  userId: string                // User/guest ID - indexed
+  displayName: string           // Name shown in room
+  isCreator: boolean            // True for room creator
+  joinedAt: Date
+  lastSeen: Date                // Updated on any activity
+  isOnline: boolean             // Currently connected via socket
+}
+
+// Modify existing: arcade_sessions
+interface ArcadeSession {
+  id: string
+  userId: string
+  // ... existing fields
+  roomId: string | null         // FK to arcade_rooms (null for solo play)
+  // When roomId is set, session is shared across room members
+}
+```
+
+### Indexes
+```sql
+CREATE INDEX idx_rooms_code ON arcade_rooms(code);
+CREATE INDEX idx_rooms_status ON arcade_rooms(status);
+CREATE INDEX idx_rooms_last_activity ON arcade_rooms(lastActivity);
+CREATE INDEX idx_room_members_room_id ON room_members(roomId);
+CREATE INDEX idx_room_members_user_id ON room_members(userId);
+CREATE INDEX idx_room_members_online ON room_members(isOnline) WHERE isOnline = true;
+```
+
+---
+
+## 3. API Endpoints
+
+### Room CRUD (`/api/arcade/rooms`)
+
+```typescript
+// Create room
+POST /api/arcade/rooms
+Body: {
+  name: string              // Room name
+  gameName: string          // Which game
+  gameConfig?: object       // Game settings
+  ttlMinutes?: number       // Default: 60
+  creatorName: string       // Display name
+}
+Response: {
+  room: ArcadeRoom
+  joinUrl: string           // Full URL to share
+}
+
+// Get room details
+GET /api/arcade/rooms/:roomId
+Response: {
+  room: ArcadeRoom
+  members: RoomMember[]
+  canModerate: boolean      // True if requester is creator
+}
+
+// Update room (creator only)
+PATCH /api/arcade/rooms/:roomId
+Body: {
+  name?: string
+  isLocked?: boolean
+  ttlMinutes?: number
+}
+Response: { room: ArcadeRoom }
+
+// Delete room (creator only)
+DELETE /api/arcade/rooms/:roomId
+Response: { success: boolean }
+
+// Join room by code
+GET /api/arcade/rooms/join/:code
+Response: {
+  roomId: string
+  redirectUrl: string
+}
+```
+
+### Room Discovery
+
+```typescript
+// Public room lobby (list all active rooms)
+GET /api/arcade/rooms/lobby
+Query: {
+  gameName?: string         // Filter by game
+  status?: string           // Filter by status
+  limit?: number            // Default: 50
+  offset?: number
+}
+Response: {
+  rooms: Array<{
+    id: string
+    name: string
+    code: string
+    gameName: string
+    status: string
+    memberCount: number
+    createdAt: Date
+    creatorName: string
+  }>
+  total: number
+}
+
+// Get user's rooms (all rooms user has joined)
+GET /api/arcade/rooms/my-rooms
+Query: { userId: string }
+Response: {
+  rooms: Array<RoomWithMemberInfo>
+}
+```
+
+### Room Membership
+
+```typescript
+// Join room
+POST /api/arcade/rooms/:roomId/join
+Body: {
+  userId: string            // User or guest ID
+  displayName: string
+}
+Response: {
+  member: RoomMember
+  room: ArcadeRoom
+}
+
+// Leave room
+POST /api/arcade/rooms/:roomId/leave
+Body: { userId: string }
+Response: { success: boolean }
+
+// Get members
+GET /api/arcade/rooms/:roomId/members
+Response: {
+  members: RoomMember[]
+  onlineCount: number
+}
+
+// Kick member (creator only)
+DELETE /api/arcade/rooms/:roomId/members/:userId
+Response: { success: boolean }
+```
+
+### Room Game Session
+
+```typescript
+// Start game in room
+POST /api/arcade/rooms/:roomId/start-game
+Body: {
+  initiatedBy: string       // Must be room member
+  activePlayers: string[]   // Subset of room members
+}
+Response: {
+  sessionId: string
+  gameState: any
+}
+
+// End game (return to lobby)
+POST /api/arcade/rooms/:roomId/end-game
+Body: { initiatedBy: string }
+Response: { success: boolean }
+```
+
+---
+
+## 4. WebSocket Protocol
+
+### Socket.IO Room Namespacing
+
+```typescript
+// Join room's socket.io room
+socket.emit('join-room', {
+  roomId: string
+  userId: string
+})
+
+// Leave room
+socket.emit('leave-room', {
+  roomId: string
+  userId: string
+})
+
+// Update member presence
+socket.emit('update-presence', {
+  roomId: string
+  userId: string
+  isOnline: boolean
+})
+```
+
+### Server → Client Events (room-scoped broadcasts)
+
+```typescript
+// Room state changes
+socket.on('room-updated', {
+  room: ArcadeRoom
+})
+
+// Member events
+socket.on('member-joined', {
+  member: RoomMember
+  memberCount: number
+})
+
+socket.on('member-left', {
+  userId: string
+  memberCount: number
+})
+
+socket.on('member-kicked', {
+  kickedUserId: string
+  reason: string
+})
+
+socket.on('members-updated', {
+  members: RoomMember[]
+})
+
+// Game session events
+socket.on('game-starting', {
+  sessionId: string
+  activePlayers: string[]
+})
+
+socket.on('game-ended', {
+  results: any
+})
+
+// Room lifecycle
+socket.on('room-locked', {
+  isLocked: boolean
+})
+
+socket.on('room-deleted', {
+  reason: string
+})
+
+// Existing game moves (now room-scoped)
+socket.on('game-move', { roomId, userId, move })
+socket.on('move-accepted', { roomId, gameState, version })
+socket.on('move-rejected', { roomId, error })
+```
+
+---
+
+## 5. URL Structure & Routing
+
+### New Routes
+
+```typescript
+/arcade/rooms                           // Public room lobby (list all rooms)
+/arcade/rooms/create                    // Create room modal/page
+/arcade/rooms/:roomId                   // Room lobby (pre-game)
+/arcade/rooms/:roomId/matching          // Game with room context
+/arcade/rooms/:roomId/complement-race   // Another game
+/arcade/join/:code                      // Short link: redirects to room
+
+// Existing routes (backward compatible)
+/arcade                                 // My rooms + quick play
+/arcade/matching                        // Solo play (no room)
+```
+
+### Navigation Flow
+
+```
+User Journey A: Create Room
+1. /arcade → Click "Create Room"
+2. /arcade/rooms/create → Fill form, submit
+3. /arcade/rooms/{roomId} → Room lobby, share link
+4. Click "Start Game" → /arcade/rooms/{roomId}/matching
+
+User Journey B: Join via Link
+1. Receive link: example.com/arcade/rooms/{roomId}
+2. Opens lobby, automatically joins
+3. Wait for game start or click ready
+
+User Journey C: Join via Code
+1. /arcade → Click "Join Room", enter ABC123
+2. Resolves code → /arcade/rooms/{roomId}
+3. Join and wait
+
+User Journey D: Browse Lobby
+1. /arcade/rooms → See public room list
+2. Click room → /arcade/rooms/{roomId}
+3. Join and play
+```
+
+---
+
+## 6. UI Components Architecture
+
+### Component Hierarchy
+
+```
+/src/components/arcade/rooms/
+├── RoomLobbyBrowser.tsx           // Public room list (/arcade/rooms)
+│   ├── RoomCard.tsx               // Individual room preview
+│   └── RoomFilters.tsx            // Filter by game, status
+│
+├── RoomLobby.tsx                  // Pre-game lobby (/arcade/rooms/:roomId)
+│   ├── RoomHeader.tsx             // Room name, code, share button
+│   ├── RoomMemberList.tsx         // Online members
+│   ├── RoomSettings.tsx           // Creator-only settings
+│   └── RoomActions.tsx            // Start game, leave, etc.
+│
+├── CreateRoomDialog.tsx           // Room creation modal
+│   ├── GameSelector.tsx           // Choose game type
+│   ├── RoomNameInput.tsx          // Name the room
+│   └── AdvancedSettings.tsx       // TTL, etc.
+│
+├── JoinRoomDialog.tsx             // Join by code modal
+├── RoomContextIndicator.tsx       // Shows room info during game
+│   └── RoomMemberAvatars.tsx      // Small member list
+│
+└── RoomModeration.tsx             // Creator controls (kick, lock, delete)
+```
+
+### Navigation Updates
+
+```typescript
+// Update GameContextNav.tsx
+interface GameContextNavProps {
+  // ... existing props
+  roomContext?: {
+    roomId: string
+    roomName: string
+    roomCode: string
+    memberCount: number
+    isCreator: boolean
+  }
+}
+
+// Shows in nav during room gameplay:
+// [🏠 Friday Night (ABC123) • 5 players ▼]
+```
+
+---
+
+## 7. State Management
+
+### New Hooks
+
+```typescript
+// useArcadeRoom.ts - Room state and membership
+export function useArcadeRoom(roomId: string) {
+  return {
+    room: ArcadeRoom | null
+    members: RoomMember[]
+    isCreator: boolean
+    isOnline: boolean
+    joinRoom: (displayName: string) => Promise<void>
+    leaveRoom: () => Promise<void>
+    updateRoom: (updates: Partial<ArcadeRoom>) => Promise<void>
+    deleteRoom: () => Promise<void>
+    kickMember: (userId: string) => Promise<void>
+    startGame: (activePlayers: string[]) => Promise<void>
+    endGame: () => Promise<void>
+  }
+}
+
+// useRoomMembers.ts - Real-time member presence
+export function useRoomMembers(roomId: string) {
+  return {
+    members: RoomMember[]
+    onlineMembers: RoomMember[]
+    onlineCount: number
+    updatePresence: (isOnline: boolean) => void
+  }
+}
+
+// useRoomLobby.ts - Public room discovery
+export function useRoomLobby(filters?: RoomFilters) {
+  return {
+    rooms: RoomPreview[]
+    loading: boolean
+    refresh: () => void
+    loadMore: () => void
+  }
+}
+
+// Update useArcadeSession.ts
+export function useArcadeSession<TState>(options: {
+  userId: string
+  roomId?: string  // NEW: optional room context
+  // ... existing options
+}) {
+  // If roomId provided, session is room-scoped
+  // All moves broadcast to room members
+}
+```
+
+---
+
+## 8. Server Implementation
+
+### New Files
+
+```
+/src/lib/arcade/
+├── room-manager.ts              # Core room operations
+│   ├── createRoom()
+│   ├── getRoomById()
+│   ├── updateRoom()
+│   ├── deleteRoom()
+│   ├── getRoomByCode()
+│   └── getPublicRooms()
+│
+├── room-membership.ts           # Member management
+│   ├── joinRoom()
+│   ├── leaveRoom()
+│   ├── kickMember()
+│   ├── getRoomMembers()
+│   └── updateMemberPresence()
+│
+├── room-validation.ts           # Access control
+│   ├── canModerateRoom()
+│   ├── canJoinRoom()
+│   ├── canStartGame()
+│   └── validateRoomName()
+│
+├── room-ttl.ts                  # TTL management (reuse existing pattern)
+│   ├── scheduleRoomCleanup()
+│   ├── updateRoomActivity()
+│   └── cleanupExpiredRooms()
+│
+└── session-manager.ts           # Update for room support
+    └── createArcadeSession() - accept roomId param
+```
+
+### Socket Server Updates
+
+```typescript
+// socket-server.ts modifications
+
+io.on('connection', (socket) => {
+
+  // Join room (socket.io namespace)
+  socket.on('join-room', async ({ roomId, userId }) => {
+    // Validate membership
+    const member = await getRoomMember(roomId, userId)
+    if (!member) {
+      socket.emit('room-error', { error: 'Not a room member' })
+      return
+    }
+
+    // Join socket.io room
+    socket.join(`room:${roomId}`)
+
+    // Update presence
+    await updateMemberPresence(roomId, userId, true)
+
+    // Broadcast to room
+    io.to(`room:${roomId}`).emit('member-joined', { member })
+
+    // Send current state
+    const room = await getRoomById(roomId)
+    const members = await getRoomMembers(roomId)
+    socket.emit('room-state', { room, members })
+  })
+
+  // Leave room
+  socket.on('leave-room', async ({ roomId, userId }) => {
+    socket.leave(`room:${roomId}`)
+    await updateMemberPresence(roomId, userId, false)
+    io.to(`room:${roomId}`).emit('member-left', { userId })
+  })
+
+  // Game moves (room-scoped)
+  socket.on('game-move', async ({ roomId, userId, move }) => {
+    // Validate room membership
+    const member = await getRoomMember(roomId, userId)
+    if (!member) return
+
+    // Apply move to room's session
+    const result = await applyGameMove(userId, move, roomId)
+
+    if (result.success) {
+      // Broadcast to all room members
+      io.to(`room:${roomId}`).emit('move-accepted', {
+        gameState: result.session.gameState,
+        version: result.session.version,
+        move
+      })
+    }
+  })
+
+  // Disconnect handling
+  socket.on('disconnect', () => {
+    // Update presence for all rooms user was in
+    updateAllUserPresence(userId, false)
+  })
+})
+```
+
+---
+
+## 9. Guest User System
+
+### Guest ID Generation
+
+```typescript
+// /src/lib/guest-id.ts
+
+export function generateGuestId(): string {
+  // Format: guest_{timestamp}_{random}
+  // Example: guest_1704556800000_a3f2e1
+  const timestamp = Date.now()
+  const random = Math.random().toString(36).substring(2, 8)
+  return `guest_${timestamp}_${random}`
+}
+
+export function isGuestId(userId: string): boolean {
+  return userId.startsWith('guest_')
+}
+
+export function getGuestDisplayName(guestId: string): string {
+  // Generate friendly name like "Guest 1234"
+  const hash = guestId.split('_')[2]
+  const num = parseInt(hash, 36) % 10000
+  return `Guest ${num}`
+}
+```
+
+### Guest Session Storage
+
+```typescript
+// Store guest ID in localStorage
+const GUEST_ID_KEY = 'soroban_guest_id'
+
+export function getOrCreateGuestId(): string {
+  let guestId = localStorage.getItem(GUEST_ID_KEY)
+  if (!guestId) {
+    guestId = generateGuestId()
+    localStorage.setItem(GUEST_ID_KEY, guestId)
+  }
+  return guestId
+}
+```
+
+---
+
+## 10. TTL Implementation
+
+### Reuse Existing Session TTL Pattern
+
+```typescript
+// room-ttl.ts
+
+const DEFAULT_ROOM_TTL_MINUTES = 60
+
+// Cleanup job (run every 5 minutes)
+setInterval(async () => {
+  await cleanupExpiredRooms()
+}, 5 * 60 * 1000)
+
+async function cleanupExpiredRooms() {
+  const now = new Date()
+
+  // Find expired rooms
+  const expiredRooms = await db.query(`
+    SELECT id FROM arcade_rooms
+    WHERE status != 'playing'
+    AND lastActivity < NOW() - INTERVAL '1 minute' * ttlMinutes
+  `)
+
+  for (const room of expiredRooms) {
+    // Notify members
+    io.to(`room:${room.id}`).emit('room-deleted', {
+      reason: 'Room expired due to inactivity'
+    })
+
+    // Delete room and members
+    await deleteRoom(room.id)
+  }
+}
+
+// Update activity on any room action
+export async function touchRoom(roomId: string) {
+  await db.query(`
+    UPDATE arcade_rooms
+    SET lastActivity = NOW()
+    WHERE id = $1
+  `, [roomId])
+}
+```
+
+---
+
+## 11. Room Code Generation
+
+```typescript
+// /src/lib/arcade/room-code.ts
+
+const CODE_CHARS = 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789' // No ambiguous chars
+const CODE_LENGTH = 6
+
+export async function generateUniqueRoomCode(): Promise<string> {
+  let attempts = 0
+  const maxAttempts = 10
+
+  while (attempts < maxAttempts) {
+    const code = generateCode()
+    const existing = await getRoomByCode(code)
+    if (!existing) return code
+    attempts++
+  }
+
+  throw new Error('Failed to generate unique room code')
+}
+
+function generateCode(): string {
+  let code = ''
+  for (let i = 0; i < CODE_LENGTH; i++) {
+    const idx = Math.floor(Math.random() * CODE_CHARS.length)
+    code += CODE_CHARS[idx]
+  }
+  return code
+}
+```
+
+---
+
+## 12. Migration Plan
+
+### Phase 1: Database & API Foundation (Day 1-2)
+1. Create database tables and indexes
+2. Implement room-manager.ts and room-membership.ts
+3. Build API endpoints
+4. Add room-code generation
+5. Implement TTL cleanup
+6. Write unit tests
+
+### Phase 2: Socket.IO Integration (Day 2-3)
+1. Update socket-server.ts for room namespacing
+2. Implement room-scoped broadcasts
+3. Add presence tracking
+4. Update session-manager.ts for roomId support
+5. Test multi-user room sessions
+
+### Phase 3: Guest User System (Day 3)
+1. Implement guest ID generation
+2. Add guest user hooks
+3. Update auth flow for optional guest access
+4. Test guest join/leave flow
+
+### Phase 4: UI Components (Day 4-5)
+1. Build CreateRoomDialog
+2. Build RoomLobby component
+3. Build RoomLobbyBrowser (public lobby)
+4. Add RoomContextIndicator to nav
+5. Wire up all hooks
+
+### Phase 5: Routes & Navigation (Day 5-6)
+1. Create /arcade/rooms routes
+2. Update arcade home for room access
+3. Add room selector to nav
+4. Implement join-by-code flow
+5. Add share room functionality
+
+### Phase 6: Testing & Polish (Day 6-7)
+1. E2E tests for room creation/join
+2. Multi-user gameplay tests
+3. TTL and cleanup tests
+4. Guest user flow tests
+5. Performance testing
+6. UI polish and error states
+
+---
+
+## 13. Backward Compatibility
+
+### Solo Play Preserved
+- Existing `/arcade/matching` routes work unchanged
+- `roomId = null` for solo sessions
+- No breaking changes to `useArcadeSession`
+- All current functionality remains intact
+
+### Migration Strategy
+- Add `roomId` column to `arcade_sessions` (nullable)
+- Existing sessions have `roomId = null`
+- New room-based sessions have `roomId` populated
+- Session logic checks: `if (roomId) { /* room mode */ }`
+
+---
+
+## 14. Security Considerations
+
+### Room Access
+- ✅ Validate room membership before allowing game moves
+- ✅ Check `isCreator` flag for moderation actions
+- ✅ Prevent joining locked rooms
+- ✅ Rate limit room creation per IP/user
+- ✅ Sanitize room names (max length, no XSS)
+
+### Guest Users
+- ✅ Guest IDs stored client-side only (localStorage)
+- ✅ No sensitive data in guest profiles
+- ✅ Guest names sanitized
+- ✅ Rate limit guest actions
+- ✅ Allow authenticated users to "claim" guest activity
+
+### Room Moderation
+- ✅ Only creator can kick/lock/delete
+- ✅ Kicked users cannot rejoin unless creator unlocks
+- ✅ Room deletion clears all associated data
+- ✅ Audit log for moderation actions
+
+---
+
+## 15. Testing Strategy
+
+### Unit Tests
+- Room CRUD operations
+- Member join/leave logic
+- Code generation uniqueness
+- TTL cleanup
+- Guest ID generation
+- Access control validation
+
+### Integration Tests
+- Full room creation → join → play → leave flow
+- Multi-user concurrent gameplay
+- Socket.IO room broadcasts
+- Session synchronization across tabs
+- TTL expiration and cleanup
+
+### E2E Tests (Playwright)
+- Create room → share link → join as guest
+- Browse lobby → join room → play game
+- Creator kicks member
+- Room locks and unlock
+- Room TTL expiration
+
+### Load Tests
+- 100+ concurrent rooms
+- 10+ players per room
+- Rapid join/leave cycles
+- Socket.IO message throughput
+
+---
+
+## 16. Performance Optimizations
+
+### Database
+- Index on `room_members.roomId` for fast member queries
+- Index on `arcade_rooms.code` for quick code lookups
+- Index on `room_members.isOnline` for presence queries
+- Partition `arcade_rooms` by `createdAt` for TTL cleanup
+
+### Caching
+- Cache active room list (1-minute TTL)
+- Cache room member counts
+- Redis pub/sub for cross-server socket broadcasts (future)
+
+### Socket.IO
+- Use socket.io rooms for efficient broadcasting
+- Batch presence updates (debounce member online status)
+- Compress socket messages for large game states
+
+---
+
+## 17. Future Enhancements (Post-MVP)
+
+1. **Room Templates** - Save room configurations
+2. **Private Rooms** - Invite-only with passwords
+3. **Room Chat** - Text chat in lobby
+4. **Spectator Mode** - Watch games without playing
+5. **Room History** - Past games and stats
+6. **Tournament Brackets** - Multi-round competitions
+7. **Room Search** - Search by name/tag
+8. **Room Tags** - Categorize rooms
+9. **Friend Integration** - Invite friends directly
+10. **Room Analytics** - Popular times, average players, etc.
+
+---
+
+## 18. Open Questions / Decisions Needed
+
+1. **Room Name Validation** - Max length? Profanity filter?
+2. **Default TTL** - 60 minutes good default?
+3. **Code Reuse** - Can codes be reused after room expires?
+4. **Member Limit** - Even though unlimited, warn at certain threshold?
+5. **Lobby Pagination** - How many rooms to show initially?
+
+---
+
+## 19. Success Metrics
+
+- ✅ Users can create and join rooms
+- ✅ Guest users can participate without auth
+- ✅ Multi-user gameplay synchronized across all room members
+- ✅ Room creators can moderate effectively
+- ✅ Rooms expire correctly based on TTL
+- ✅ Public lobby shows active rooms
+- ✅ No regressions in solo play mode
+- ✅ All tests passing (unit, integration, e2e)
+
+---
+
+## 20. Dependencies
+
+### Existing Systems to Leverage
+- ✅ Current arcade session management
+- ✅ Existing WebSocket infrastructure (socket-server.ts)
+- ✅ Database setup (PostgreSQL)
+- ✅ Guest player system (from GameModeContext)
+
+### New Dependencies (if needed)
+- None! All can be built with existing stack
+
+---
+
+## Implementation Checklist
+
+- [ ] Create database migration
+- [ ] Implement room-manager.ts
+- [ ] Implement room-membership.ts
+- [ ] Build API endpoints
+- [ ] Add room code generation
+- [ ] Update socket-server.ts
+- [ ] Implement guest ID system
+- [ ] Build CreateRoomDialog
+- [ ] Build RoomLobby component
+- [ ] Build RoomLobbyBrowser
+- [ ] Add room routes
+- [ ] Update navigation
+- [ ] Write unit tests
+- [ ] Write integration tests
+- [ ] Write e2e tests
+- [ ] Documentation
+- [ ] Deploy
+
+---
+
+**Ready to implement! 🚀**

apps/web/docs/terminology-user-player-room.md

@@ -0,0 +1,153 @@
+# User vs Player vs Room Member - Terminology Guide
+
+**Critical Distinction**: Users, Players, and Room Members are three different concepts in the system.
+
+## Core Concepts
+
+### 1. **USER** (Identity Layer)
+- **Table**: `users`
+- **Purpose**: Identity - guest or authenticated account
+- **Identified by**: `guestId` (HttpOnly cookie)
+- **Retrieved via**: `useViewerId()` hook
+- **Scope**: One per browser/account
+- **Example**: A person visiting the site
+
+### 2. **PLAYER** (Game Avatar Layer)
+- **Table**: `players`
+- **Purpose**: Game profiles/avatars that represent a participant in the game
+- **Belongs to**: USER (via `userId` FK)
+- **Properties**: name, emoji, color, `isActive`
+- **Scope**: A USER can have MULTIPLE players (e.g., "Alice 👧", "Bob 👦", "Charlie 🧒")
+- **Used in**: All game contexts - both local and online multiplayer
+- **Active Players**: Players where `isActive = true` are the ones currently participating
+
+### 3. **ROOM MEMBER** (Room Participation Layer)
+- **Table**: `room_members`
+- **Purpose**: Tracks a USER's participation in a multiplayer room
+- **Identified by**: `userId` (references the guest/user)
+- **Properties**: `displayName`, `isCreator`, `isOnline`, `joinedAt`
+- **Scope**: One record per USER per room
+
+## How They Work Together
+
+### When a USER joins a room:
+
+1. **Room Member Created**: A `room_members` record is created with the USER's ID
+2. **Active Players Join**: The USER's ACTIVE PLAYERS (where `isActive = true`) participate in the game
+3. **Arcade Session**: The `arcade_sessions.activePlayers` field contains the PLAYER IDs (from `players` table)
+
+### Example Flow:
+
+```
+USER: guest_abc123 (Jane)
+  ├─ PLAYER: player_001 (name: "Alice 👧", isActive: true)
+  ├─ PLAYER: player_002 (name: "Bob 👦", isActive: true)
+  └─ PLAYER: player_003 (name: "Charlie 🧒", isActive: false)
+
+When USER joins ROOM "Math Masters":
+  → ROOM_MEMBER created: {userId: "guest_abc123", displayName: "Jane", roomId: "room_xyz"}
+  → PLAYERS joining game: ["player_001", "player_002"] (only active ones)
+  → ARCADE_SESSION.activePlayers: ["player_001", "player_002"]
+```
+
+### Multi-User Room Example:
+
+```
+ROOM "Math Masters" (room_xyz):
+
+  ROOM_MEMBER 1:
+    userId: guest_abc123 (Jane)
+    └─ PLAYERS in game: ["player_001" (Alice), "player_002" (Bob)]
+
+  ROOM_MEMBER 2:
+    userId: guest_def456 (Mark)
+    └─ PLAYERS in game: ["player_003" (Mario)]
+
+  ROOM_MEMBER 3:
+    userId: guest_ghi789 (Sara)
+    └─ PLAYERS in game: ["player_004" (Luna), "player_005" (Nova), "player_006" (Star)]
+
+Total PLAYERS in this game: 6 players across 3 users
+```
+
+## Database Schema Relationships
+
+```
+users (1) ──< (many) players
+  │
+  └──< (many) room_members
+                 │
+                 └──< belongs to arcade_rooms
+
+arcade_sessions:
+  - userId: references users.id
+  - activePlayers: JSON array of player.id values
+  - roomId: references arcade_rooms.id (null for solo play)
+```
+
+## Implementation Rules
+
+### ✅ Correct Usage
+
+- **Room membership**: Track by USER ID
+- **Game participation**: Track by PLAYER IDs
+- **Presence/online status**: Track by USER ID (room member)
+- **Scores/moves**: Track by PLAYER ID
+- **Room creator**: Track by USER ID
+
+### ❌ Common Mistakes
+
+- ❌ Using USER ID where PLAYER ID is needed
+- ❌ Assuming one USER = one PLAYER
+- ❌ Tracking scores by USER instead of PLAYER
+- ❌ Mixing room_members.displayName with players.name
+
+## API Design Patterns
+
+### When a USER joins a room:
+
+```typescript
+// 1. Add user as room member
+POST /api/arcade/rooms/:roomId/join
+Body: {
+  userId: string        // USER ID (from useViewerId)
+  displayName: string   // Room member display name
+}
+
+// 2. System retrieves user's active players
+const activePlayers = await db.query.players.findMany({
+  where: and(
+    eq(players.userId, userId),
+    eq(players.isActive, true)
+  )
+})
+
+// 3. Game starts with those player IDs
+const session = {
+  userId,
+  activePlayers: activePlayers.map(p => p.id), // PLAYER IDs
+  roomId
+}
+```
+
+### Socket Events
+
+```typescript
+// User joins room (presence)
+socket.emit('join-room', { roomId, userId })
+
+// Player makes a move (game action)
+socket.emit('game-move', {
+  roomId,
+  playerId, // PLAYER ID, not USER ID
+  move
+})
+```
+
+## Summary
+
+- **USER** = Identity/account (one per person)
+- **PLAYER** = Game avatar/profile (multiple per user)
+- **ROOM MEMBER** = USER's participation in a room
+- **When USER joins room** → Their ACTIVE PLAYERS join the game
+- **`activePlayers` field** → Array of PLAYER IDs from `players` table

apps/web/drizzle.config.ts

@@ -0,0 +1,12 @@
+import type { Config } from 'drizzle-kit'
+
+export default {
+  schema: './src/db/schema/index.ts',
+  out: './drizzle',
+  dialect: 'sqlite',
+  dbCredentials: {
+    url: process.env.DATABASE_URL || './data/sqlite.db',
+  },
+  verbose: true,
+  strict: true,
+} satisfies Config

apps/web/drizzle/0000_third_carnage.sql

@@ -0,0 +1,32 @@
+CREATE TABLE `users` (
+	`id` text PRIMARY KEY NOT NULL,
+	`guest_id` text NOT NULL,
+	`created_at` integer NOT NULL,
+	`upgraded_at` integer,
+	`email` text,
+	`name` text
+);
+--> statement-breakpoint
+CREATE UNIQUE INDEX `users_guest_id_unique` ON `users` (`guest_id`);--> statement-breakpoint
+CREATE UNIQUE INDEX `users_email_unique` ON `users` (`email`);--> statement-breakpoint
+CREATE TABLE `players` (
+	`id` text PRIMARY KEY NOT NULL,
+	`user_id` text NOT NULL,
+	`name` text NOT NULL,
+	`emoji` text NOT NULL,
+	`color` text NOT NULL,
+	`is_active` integer DEFAULT false NOT NULL,
+	`created_at` integer NOT NULL,
+	FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON UPDATE no action ON DELETE cascade
+);
+--> statement-breakpoint
+CREATE INDEX `players_user_id_idx` ON `players` (`user_id`);--> statement-breakpoint
+CREATE TABLE `user_stats` (
+	`user_id` text PRIMARY KEY NOT NULL,
+	`games_played` integer DEFAULT 0 NOT NULL,
+	`total_wins` integer DEFAULT 0 NOT NULL,
+	`favorite_game_type` text,
+	`best_time` integer,
+	`highest_accuracy` real DEFAULT 0 NOT NULL,
+	FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON UPDATE no action ON DELETE cascade
+);

apps/web/drizzle/0001_friendly_stingray.sql

@@ -0,0 +1,16 @@
+CREATE TABLE `abacus_settings` (
+	`user_id` text PRIMARY KEY NOT NULL,
+	`color_scheme` text DEFAULT 'place-value' NOT NULL,
+	`bead_shape` text DEFAULT 'diamond' NOT NULL,
+	`color_palette` text DEFAULT 'default' NOT NULL,
+	`hide_inactive_beads` integer DEFAULT false NOT NULL,
+	`colored_numerals` integer DEFAULT false NOT NULL,
+	`scale_factor` real DEFAULT 1 NOT NULL,
+	`show_numbers` integer DEFAULT true NOT NULL,
+	`animated` integer DEFAULT true NOT NULL,
+	`interactive` integer DEFAULT false NOT NULL,
+	`gestures` integer DEFAULT false NOT NULL,
+	`sound_enabled` integer DEFAULT true NOT NULL,
+	`sound_volume` real DEFAULT 0.8 NOT NULL,
+	FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON UPDATE no action ON DELETE cascade
+);

apps/web/drizzle/0002_loose_ultimatum.sql

@@ -0,0 +1,13 @@
+CREATE TABLE `arcade_sessions` (
+	`user_id` text PRIMARY KEY NOT NULL,
+	`current_game` text NOT NULL,
+	`game_url` text NOT NULL,
+	`game_state` text NOT NULL,
+	`active_players` text NOT NULL,
+	`started_at` integer NOT NULL,
+	`last_activity_at` integer NOT NULL,
+	`expires_at` integer NOT NULL,
+	`is_active` integer DEFAULT true NOT NULL,
+	`version` integer DEFAULT 1 NOT NULL,
+	FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON UPDATE no action ON DELETE cascade
+);

apps/web/drizzle/0003_naive_reptil.sql

@@ -0,0 +1,31 @@
+CREATE TABLE `arcade_rooms` (
+	`id` text PRIMARY KEY NOT NULL,
+	`code` text(6) NOT NULL,
+	`name` text(50) NOT NULL,
+	`created_by` text NOT NULL,
+	`creator_name` text(50) NOT NULL,
+	`created_at` integer NOT NULL,
+	`last_activity` integer NOT NULL,
+	`ttl_minutes` integer DEFAULT 60 NOT NULL,
+	`is_locked` integer DEFAULT false NOT NULL,
+	`game_name` text NOT NULL,
+	`game_config` text NOT NULL,
+	`status` text DEFAULT 'lobby' NOT NULL,
+	`current_session_id` text,
+	`total_games_played` integer DEFAULT 0 NOT NULL
+);
+--> statement-breakpoint
+CREATE UNIQUE INDEX `arcade_rooms_code_unique` ON `arcade_rooms` (`code`);--> statement-breakpoint
+CREATE TABLE `room_members` (
+	`id` text PRIMARY KEY NOT NULL,
+	`room_id` text NOT NULL,
+	`user_id` text NOT NULL,
+	`display_name` text(50) NOT NULL,
+	`is_creator` integer DEFAULT false NOT NULL,
+	`joined_at` integer NOT NULL,
+	`last_seen` integer NOT NULL,
+	`is_online` integer DEFAULT true NOT NULL,
+	FOREIGN KEY (`room_id`) REFERENCES `arcade_rooms`(`id`) ON UPDATE no action ON DELETE cascade
+);
+--> statement-breakpoint
+ALTER TABLE `arcade_sessions` ADD `room_id` text REFERENCES arcade_rooms(id);

apps/web/drizzle/0004_shiny_madelyne_pryor.sql

@@ -0,0 +1,15 @@
+-- Step 1: Clean up any duplicate room memberships
+-- Keep only the most recent membership for each user (by last_seen timestamp)
+DELETE FROM `room_members`
+WHERE `id` NOT IN (
+  SELECT `id` FROM (
+    SELECT `id`, ROW_NUMBER() OVER (
+      PARTITION BY `user_id`
+      ORDER BY `last_seen` DESC, `joined_at` DESC
+    ) as rn
+    FROM `room_members`
+  ) WHERE rn = 1
+);--> statement-breakpoint
+
+-- Step 2: Add unique constraint to enforce one room per user
+CREATE UNIQUE INDEX `idx_room_members_user_id_unique` ON `room_members` (`user_id`);

apps/web/drizzle/meta/0000_snapshot.json

@@ -0,0 +1,222 @@
+{
+  "version": "6",
+  "dialect": "sqlite",
+  "id": "949424bf-1933-497c-af2d-cab6ee81083d",
+  "prevId": "00000000-0000-0000-0000-000000000000",
+  "tables": {
+    "users": {
+      "name": "users",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "guest_id": {
+          "name": "guest_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "upgraded_at": {
+          "name": "upgraded_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "email": {
+          "name": "email",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "users_guest_id_unique": {
+          "name": "users_guest_id_unique",
+          "columns": ["guest_id"],
+          "isUnique": true
+        },
+        "users_email_unique": {
+          "name": "users_email_unique",
+          "columns": ["email"],
+          "isUnique": true
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "players": {
+      "name": "players",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "emoji": {
+          "name": "emoji",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "color": {
+          "name": "color",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "is_active": {
+          "name": "is_active",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "players_user_id_idx": {
+          "name": "players_user_id_idx",
+          "columns": ["user_id"],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "players_user_id_users_id_fk": {
+          "name": "players_user_id_users_id_fk",
+          "tableFrom": "players",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "user_stats": {
+      "name": "user_stats",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "games_played": {
+          "name": "games_played",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        },
+        "total_wins": {
+          "name": "total_wins",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        },
+        "favorite_game_type": {
+          "name": "favorite_game_type",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "best_time": {
+          "name": "best_time",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "highest_accuracy": {
+          "name": "highest_accuracy",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "user_stats_user_id_users_id_fk": {
+          "name": "user_stats_user_id_users_id_fk",
+          "tableFrom": "user_stats",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    }
+  },
+  "views": {},
+  "enums": {},
+  "_meta": {
+    "schemas": {},
+    "tables": {},
+    "columns": {}
+  },
+  "internal": {
+    "indexes": {}
+  }
+}

apps/web/drizzle/meta/0001_snapshot.json

@@ -0,0 +1,345 @@
+{
+  "version": "6",
+  "dialect": "sqlite",
+  "id": "25d98633-0bae-4f6e-845b-ed87f53fc233",
+  "prevId": "949424bf-1933-497c-af2d-cab6ee81083d",
+  "tables": {
+    "users": {
+      "name": "users",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "guest_id": {
+          "name": "guest_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "upgraded_at": {
+          "name": "upgraded_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "email": {
+          "name": "email",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "users_guest_id_unique": {
+          "name": "users_guest_id_unique",
+          "columns": ["guest_id"],
+          "isUnique": true
+        },
+        "users_email_unique": {
+          "name": "users_email_unique",
+          "columns": ["email"],
+          "isUnique": true
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "players": {
+      "name": "players",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "emoji": {
+          "name": "emoji",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "color": {
+          "name": "color",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "is_active": {
+          "name": "is_active",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "players_user_id_idx": {
+          "name": "players_user_id_idx",
+          "columns": ["user_id"],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "players_user_id_users_id_fk": {
+          "name": "players_user_id_users_id_fk",
+          "tableFrom": "players",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "user_stats": {
+      "name": "user_stats",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "games_played": {
+          "name": "games_played",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        },
+        "total_wins": {
+          "name": "total_wins",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        },
+        "favorite_game_type": {
+          "name": "favorite_game_type",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "best_time": {
+          "name": "best_time",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "highest_accuracy": {
+          "name": "highest_accuracy",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "user_stats_user_id_users_id_fk": {
+          "name": "user_stats_user_id_users_id_fk",
+          "tableFrom": "user_stats",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "abacus_settings": {
+      "name": "abacus_settings",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "color_scheme": {
+          "name": "color_scheme",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'place-value'"
+        },
+        "bead_shape": {
+          "name": "bead_shape",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'diamond'"
+        },
+        "color_palette": {
+          "name": "color_palette",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'default'"
+        },
+        "hide_inactive_beads": {
+          "name": "hide_inactive_beads",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "colored_numerals": {
+          "name": "colored_numerals",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "scale_factor": {
+          "name": "scale_factor",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 1
+        },
+        "show_numbers": {
+          "name": "show_numbers",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "animated": {
+          "name": "animated",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "interactive": {
+          "name": "interactive",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "gestures": {
+          "name": "gestures",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "sound_enabled": {
+          "name": "sound_enabled",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "sound_volume": {
+          "name": "sound_volume",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0.8
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "abacus_settings_user_id_users_id_fk": {
+          "name": "abacus_settings_user_id_users_id_fk",
+          "tableFrom": "abacus_settings",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    }
+  },
+  "views": {},
+  "enums": {},
+  "_meta": {
+    "schemas": {},
+    "tables": {},
+    "columns": {}
+  },
+  "internal": {
+    "indexes": {}
+  }
+}

apps/web/drizzle/meta/0002_snapshot.json

@@ -0,0 +1,437 @@
+{
+  "version": "6",
+  "dialect": "sqlite",
+  "id": "194ccc68-7173-44c9-879a-55d20cf3ae1f",
+  "prevId": "25d98633-0bae-4f6e-845b-ed87f53fc233",
+  "tables": {
+    "users": {
+      "name": "users",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "guest_id": {
+          "name": "guest_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "upgraded_at": {
+          "name": "upgraded_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "email": {
+          "name": "email",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "users_guest_id_unique": {
+          "name": "users_guest_id_unique",
+          "columns": ["guest_id"],
+          "isUnique": true
+        },
+        "users_email_unique": {
+          "name": "users_email_unique",
+          "columns": ["email"],
+          "isUnique": true
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "players": {
+      "name": "players",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "emoji": {
+          "name": "emoji",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "color": {
+          "name": "color",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "is_active": {
+          "name": "is_active",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "players_user_id_idx": {
+          "name": "players_user_id_idx",
+          "columns": ["user_id"],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "players_user_id_users_id_fk": {
+          "name": "players_user_id_users_id_fk",
+          "tableFrom": "players",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "user_stats": {
+      "name": "user_stats",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "games_played": {
+          "name": "games_played",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        },
+        "total_wins": {
+          "name": "total_wins",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        },
+        "favorite_game_type": {
+          "name": "favorite_game_type",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "best_time": {
+          "name": "best_time",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "highest_accuracy": {
+          "name": "highest_accuracy",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "user_stats_user_id_users_id_fk": {
+          "name": "user_stats_user_id_users_id_fk",
+          "tableFrom": "user_stats",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "abacus_settings": {
+      "name": "abacus_settings",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "color_scheme": {
+          "name": "color_scheme",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'place-value'"
+        },
+        "bead_shape": {
+          "name": "bead_shape",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'diamond'"
+        },
+        "color_palette": {
+          "name": "color_palette",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'default'"
+        },
+        "hide_inactive_beads": {
+          "name": "hide_inactive_beads",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "colored_numerals": {
+          "name": "colored_numerals",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "scale_factor": {
+          "name": "scale_factor",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 1
+        },
+        "show_numbers": {
+          "name": "show_numbers",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "animated": {
+          "name": "animated",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "interactive": {
+          "name": "interactive",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "gestures": {
+          "name": "gestures",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "sound_enabled": {
+          "name": "sound_enabled",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "sound_volume": {
+          "name": "sound_volume",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0.8
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "abacus_settings_user_id_users_id_fk": {
+          "name": "abacus_settings_user_id_users_id_fk",
+          "tableFrom": "abacus_settings",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "arcade_sessions": {
+      "name": "arcade_sessions",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "current_game": {
+          "name": "current_game",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "game_url": {
+          "name": "game_url",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "game_state": {
+          "name": "game_state",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "active_players": {
+          "name": "active_players",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "started_at": {
+          "name": "started_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "last_activity_at": {
+          "name": "last_activity_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "is_active": {
+          "name": "is_active",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "version": {
+          "name": "version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 1
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "arcade_sessions_user_id_users_id_fk": {
+          "name": "arcade_sessions_user_id_users_id_fk",
+          "tableFrom": "arcade_sessions",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    }
+  },
+  "views": {},
+  "enums": {},
+  "_meta": {
+    "schemas": {},
+    "tables": {},
+    "columns": {}
+  },
+  "internal": {
+    "indexes": {}
+  }
+}

apps/web/drizzle/meta/0003_snapshot.json

@@ -0,0 +1,649 @@
+{
+  "version": "6",
+  "dialect": "sqlite",
+  "id": "68cc273f-0d84-4a46-ae41-124a3e06096b",
+  "prevId": "194ccc68-7173-44c9-879a-55d20cf3ae1f",
+  "tables": {
+    "users": {
+      "name": "users",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "guest_id": {
+          "name": "guest_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "upgraded_at": {
+          "name": "upgraded_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "email": {
+          "name": "email",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "users_guest_id_unique": {
+          "name": "users_guest_id_unique",
+          "columns": ["guest_id"],
+          "isUnique": true
+        },
+        "users_email_unique": {
+          "name": "users_email_unique",
+          "columns": ["email"],
+          "isUnique": true
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "players": {
+      "name": "players",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "emoji": {
+          "name": "emoji",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "color": {
+          "name": "color",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "is_active": {
+          "name": "is_active",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "players_user_id_idx": {
+          "name": "players_user_id_idx",
+          "columns": ["user_id"],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "players_user_id_users_id_fk": {
+          "name": "players_user_id_users_id_fk",
+          "tableFrom": "players",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "user_stats": {
+      "name": "user_stats",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "games_played": {
+          "name": "games_played",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        },
+        "total_wins": {
+          "name": "total_wins",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        },
+        "favorite_game_type": {
+          "name": "favorite_game_type",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "best_time": {
+          "name": "best_time",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "highest_accuracy": {
+          "name": "highest_accuracy",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "user_stats_user_id_users_id_fk": {
+          "name": "user_stats_user_id_users_id_fk",
+          "tableFrom": "user_stats",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "abacus_settings": {
+      "name": "abacus_settings",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "color_scheme": {
+          "name": "color_scheme",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'place-value'"
+        },
+        "bead_shape": {
+          "name": "bead_shape",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'diamond'"
+        },
+        "color_palette": {
+          "name": "color_palette",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'default'"
+        },
+        "hide_inactive_beads": {
+          "name": "hide_inactive_beads",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "colored_numerals": {
+          "name": "colored_numerals",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "scale_factor": {
+          "name": "scale_factor",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 1
+        },
+        "show_numbers": {
+          "name": "show_numbers",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "animated": {
+          "name": "animated",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "interactive": {
+          "name": "interactive",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "gestures": {
+          "name": "gestures",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "sound_enabled": {
+          "name": "sound_enabled",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "sound_volume": {
+          "name": "sound_volume",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0.8
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "abacus_settings_user_id_users_id_fk": {
+          "name": "abacus_settings_user_id_users_id_fk",
+          "tableFrom": "abacus_settings",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "arcade_rooms": {
+      "name": "arcade_rooms",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "code": {
+          "name": "code",
+          "type": "text(6)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text(50)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_by": {
+          "name": "created_by",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "creator_name": {
+          "name": "creator_name",
+          "type": "text(50)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "last_activity": {
+          "name": "last_activity",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "ttl_minutes": {
+          "name": "ttl_minutes",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 60
+        },
+        "is_locked": {
+          "name": "is_locked",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "game_name": {
+          "name": "game_name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "game_config": {
+          "name": "game_config",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "status": {
+          "name": "status",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'lobby'"
+        },
+        "current_session_id": {
+          "name": "current_session_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "total_games_played": {
+          "name": "total_games_played",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        }
+      },
+      "indexes": {
+        "arcade_rooms_code_unique": {
+          "name": "arcade_rooms_code_unique",
+          "columns": ["code"],
+          "isUnique": true
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "room_members": {
+      "name": "room_members",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "room_id": {
+          "name": "room_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "display_name": {
+          "name": "display_name",
+          "type": "text(50)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "is_creator": {
+          "name": "is_creator",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "joined_at": {
+          "name": "joined_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "last_seen": {
+          "name": "last_seen",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "is_online": {
+          "name": "is_online",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "room_members_room_id_arcade_rooms_id_fk": {
+          "name": "room_members_room_id_arcade_rooms_id_fk",
+          "tableFrom": "room_members",
+          "tableTo": "arcade_rooms",
+          "columnsFrom": ["room_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "arcade_sessions": {
+      "name": "arcade_sessions",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "current_game": {
+          "name": "current_game",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "game_url": {
+          "name": "game_url",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "game_state": {
+          "name": "game_state",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "active_players": {
+          "name": "active_players",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "room_id": {
+          "name": "room_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "started_at": {
+          "name": "started_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "last_activity_at": {
+          "name": "last_activity_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "is_active": {
+          "name": "is_active",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "version": {
+          "name": "version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 1
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "arcade_sessions_user_id_users_id_fk": {
+          "name": "arcade_sessions_user_id_users_id_fk",
+          "tableFrom": "arcade_sessions",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        },
+        "arcade_sessions_room_id_arcade_rooms_id_fk": {
+          "name": "arcade_sessions_room_id_arcade_rooms_id_fk",
+          "tableFrom": "arcade_sessions",
+          "tableTo": "arcade_rooms",
+          "columnsFrom": ["room_id"],
+          "columnsTo": ["id"],
+          "onDelete": "set null",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    }
+  },
+  "views": {},
+  "enums": {},
+  "_meta": {
+    "schemas": {},
+    "tables": {},
+    "columns": {}
+  },
+  "internal": {
+    "indexes": {}
+  }
+}

apps/web/drizzle/meta/0004_snapshot.json

@@ -0,0 +1,660 @@
+{
+  "version": "6",
+  "dialect": "sqlite",
+  "id": "cbd94d51-1454-467c-a471-ccbfca886a1a",
+  "prevId": "68cc273f-0d84-4a46-ae41-124a3e06096b",
+  "tables": {
+    "abacus_settings": {
+      "name": "abacus_settings",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "color_scheme": {
+          "name": "color_scheme",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'place-value'"
+        },
+        "bead_shape": {
+          "name": "bead_shape",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'diamond'"
+        },
+        "color_palette": {
+          "name": "color_palette",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'default'"
+        },
+        "hide_inactive_beads": {
+          "name": "hide_inactive_beads",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "colored_numerals": {
+          "name": "colored_numerals",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "scale_factor": {
+          "name": "scale_factor",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 1
+        },
+        "show_numbers": {
+          "name": "show_numbers",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "animated": {
+          "name": "animated",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "interactive": {
+          "name": "interactive",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "gestures": {
+          "name": "gestures",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "sound_enabled": {
+          "name": "sound_enabled",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "sound_volume": {
+          "name": "sound_volume",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0.8
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "abacus_settings_user_id_users_id_fk": {
+          "name": "abacus_settings_user_id_users_id_fk",
+          "tableFrom": "abacus_settings",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "arcade_rooms": {
+      "name": "arcade_rooms",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "code": {
+          "name": "code",
+          "type": "text(6)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text(50)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_by": {
+          "name": "created_by",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "creator_name": {
+          "name": "creator_name",
+          "type": "text(50)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "last_activity": {
+          "name": "last_activity",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "ttl_minutes": {
+          "name": "ttl_minutes",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 60
+        },
+        "is_locked": {
+          "name": "is_locked",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "game_name": {
+          "name": "game_name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "game_config": {
+          "name": "game_config",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "status": {
+          "name": "status",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'lobby'"
+        },
+        "current_session_id": {
+          "name": "current_session_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "total_games_played": {
+          "name": "total_games_played",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        }
+      },
+      "indexes": {
+        "arcade_rooms_code_unique": {
+          "name": "arcade_rooms_code_unique",
+          "columns": ["code"],
+          "isUnique": true
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "arcade_sessions": {
+      "name": "arcade_sessions",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "current_game": {
+          "name": "current_game",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "game_url": {
+          "name": "game_url",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "game_state": {
+          "name": "game_state",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "active_players": {
+          "name": "active_players",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "room_id": {
+          "name": "room_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "started_at": {
+          "name": "started_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "last_activity_at": {
+          "name": "last_activity_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "is_active": {
+          "name": "is_active",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "version": {
+          "name": "version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 1
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "arcade_sessions_user_id_users_id_fk": {
+          "name": "arcade_sessions_user_id_users_id_fk",
+          "tableFrom": "arcade_sessions",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        },
+        "arcade_sessions_room_id_arcade_rooms_id_fk": {
+          "name": "arcade_sessions_room_id_arcade_rooms_id_fk",
+          "tableFrom": "arcade_sessions",
+          "tableTo": "arcade_rooms",
+          "columnsFrom": ["room_id"],
+          "columnsTo": ["id"],
+          "onDelete": "set null",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "players": {
+      "name": "players",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "emoji": {
+          "name": "emoji",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "color": {
+          "name": "color",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "is_active": {
+          "name": "is_active",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "players_user_id_idx": {
+          "name": "players_user_id_idx",
+          "columns": ["user_id"],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "players_user_id_users_id_fk": {
+          "name": "players_user_id_users_id_fk",
+          "tableFrom": "players",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "room_members": {
+      "name": "room_members",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "room_id": {
+          "name": "room_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "display_name": {
+          "name": "display_name",
+          "type": "text(50)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "is_creator": {
+          "name": "is_creator",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "joined_at": {
+          "name": "joined_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "last_seen": {
+          "name": "last_seen",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "is_online": {
+          "name": "is_online",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        }
+      },
+      "indexes": {
+        "room_members_user_id_unique": {
+          "name": "room_members_user_id_unique",
+          "columns": ["user_id"],
+          "isUnique": true
+        },
+        "idx_room_members_user_id_unique": {
+          "name": "idx_room_members_user_id_unique",
+          "columns": ["user_id"],
+          "isUnique": true
+        }
+      },
+      "foreignKeys": {
+        "room_members_room_id_arcade_rooms_id_fk": {
+          "name": "room_members_room_id_arcade_rooms_id_fk",
+          "tableFrom": "room_members",
+          "tableTo": "arcade_rooms",
+          "columnsFrom": ["room_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "user_stats": {
+      "name": "user_stats",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "games_played": {
+          "name": "games_played",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        },
+        "total_wins": {
+          "name": "total_wins",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        },
+        "favorite_game_type": {
+          "name": "favorite_game_type",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "best_time": {
+          "name": "best_time",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "highest_accuracy": {
+          "name": "highest_accuracy",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "user_stats_user_id_users_id_fk": {
+          "name": "user_stats_user_id_users_id_fk",
+          "tableFrom": "user_stats",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "users": {
+      "name": "users",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "guest_id": {
+          "name": "guest_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "upgraded_at": {
+          "name": "upgraded_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "email": {
+          "name": "email",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "users_guest_id_unique": {
+          "name": "users_guest_id_unique",
+          "columns": ["guest_id"],
+          "isUnique": true
+        },
+        "users_email_unique": {
+          "name": "users_email_unique",
+          "columns": ["email"],
+          "isUnique": true
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    }
+  },
+  "views": {},
+  "enums": {},
+  "_meta": {
+    "schemas": {},
+    "tables": {},
+    "columns": {}
+  },
+  "internal": {
+    "indexes": {}
+  }
+}

apps/web/drizzle/meta/_journal.json

@@ -0,0 +1,41 @@
+{
+  "version": "7",
+  "dialect": "sqlite",
+  "entries": [
+    {
+      "idx": 0,
+      "version": "6",
+      "when": 1759701472375,
+      "tag": "0000_third_carnage",
+      "breakpoints": true
+    },
+    {
+      "idx": 1,
+      "version": "6",
+      "when": 1759706755851,
+      "tag": "0001_friendly_stingray",
+      "breakpoints": true
+    },
+    {
+      "idx": 2,
+      "version": "6",
+      "when": 1759752980924,
+      "tag": "0002_loose_ultimatum",
+      "breakpoints": true
+    },
+    {
+      "idx": 3,
+      "version": "6",
+      "when": 1759781243105,
+      "tag": "0003_naive_reptil",
+      "breakpoints": true
+    },
+    {
+      "idx": 4,
+      "version": "6",
+      "when": 1759930182541,
+      "tag": "0004_shiny_madelyne_pryor",
+      "breakpoints": true
+    }
+  ]
+}

apps/web/e2e/arcade-modal-session.spec.ts

@@ -0,0 +1,338 @@
+import { expect, test } from '@playwright/test'
+
+/**
+ * Arcade Modal Session E2E Tests
+ *
+ * These tests verify that the arcade modal session system works correctly:
+ * - Users are locked into games once they start
+ * - Automatic redirects to active games
+ * - Player modification is blocked during games
+ * - "Return to Arcade" button properly ends sessions
+ */
+
+test.describe('Arcade Modal Session - Redirects', () => {
+  test.beforeEach(async ({ page }) => {
+    // Clear arcade session before each test
+    await page.goto('/arcade')
+    await page.waitForLoadState('networkidle')
+
+    // Click "Return to Arcade" button if it exists (to clear any existing session)
+    const returnButton = page.locator('button:has-text("Return to Arcade")')
+    if (await returnButton.isVisible({ timeout: 1000 }).catch(() => false)) {
+      await returnButton.click()
+      await page.waitForLoadState('networkidle')
+    }
+  })
+
+  test('should stay on arcade lobby when no active session', async ({ page }) => {
+    await page.goto('/arcade')
+    await page.waitForLoadState('networkidle')
+
+    // Should see "Champion Arena" title
+    const title = page.locator('h1:has-text("Champion Arena")')
+    await expect(title).toBeVisible()
+
+    // Should be able to select players
+    const playerSection = page.locator('text=/Player|Select|Add/i')
+    await expect(playerSection.first()).toBeVisible()
+  })
+
+  test('should redirect from arcade to active game when session exists', async ({ page }) => {
+    // Start a game to create a session
+    await page.goto('/arcade')
+    await page.waitForLoadState('networkidle')
+
+    // Find and click a player card to activate
+    const playerCard = page.locator('[data-testid="player-card"]').first()
+    if (await playerCard.isVisible({ timeout: 2000 }).catch(() => false)) {
+      await playerCard.click()
+      await page.waitForTimeout(500)
+    }
+
+    // Navigate to matching game to create session
+    await page.goto('/arcade/matching')
+    await page.waitForLoadState('networkidle')
+
+    // Start the game (click Start button if visible)
+    const startButton = page.locator('button:has-text("Start")')
+    if (await startButton.isVisible({ timeout: 2000 }).catch(() => false)) {
+      await startButton.click()
+      await page.waitForTimeout(1000)
+    }
+
+    // Try to navigate back to arcade lobby
+    await page.goto('/arcade')
+    await page.waitForTimeout(2000) // Give time for redirect
+
+    // Should be redirected back to the game
+    await expect(page).toHaveURL(/\/arcade\/matching/)
+    const gameTitle = page.locator('h1:has-text("Memory Pairs")')
+    await expect(gameTitle).toBeVisible()
+  })
+
+  test('should redirect to correct game when navigating to wrong game', async ({ page }) => {
+    // Create a session with matching game
+    await page.goto('/arcade')
+    await page.waitForLoadState('networkidle')
+
+    // Activate a player
+    const addPlayerButton = page.locator('button:has-text("Add Player"), button:has-text("+")')
+    if (
+      await addPlayerButton
+        .first()
+        .isVisible({ timeout: 2000 })
+        .catch(() => false)
+    ) {
+      await addPlayerButton.first().click()
+      await page.waitForTimeout(500)
+    }
+
+    // Go to matching game
+    await page.goto('/arcade/matching')
+    await page.waitForLoadState('networkidle')
+
+    // Start game if needed
+    const startButton = page.locator('button:has-text("Start")')
+    if (await startButton.isVisible({ timeout: 2000 }).catch(() => false)) {
+      await startButton.click()
+      await page.waitForTimeout(1000)
+    }
+
+    // Try to navigate to a different game
+    await page.goto('/arcade/memory-quiz')
+    await page.waitForTimeout(2000) // Give time for redirect
+
+    // Should be redirected back to matching
+    await expect(page).toHaveURL(/\/arcade\/matching/)
+  })
+
+  test('should NOT redirect when on correct game page', async ({ page }) => {
+    // Navigate to matching game
+    await page.goto('/arcade/matching')
+    await page.waitForLoadState('networkidle')
+
+    // Should stay on matching page
+    await expect(page).toHaveURL(/\/arcade\/matching/)
+    const gameTitle = page.locator('h1:has-text("Memory Pairs")')
+    await expect(gameTitle).toBeVisible()
+  })
+})
+
+test.describe('Arcade Modal Session - Player Modification Blocking', () => {
+  test.beforeEach(async ({ page }) => {
+    // Clear session
+    await page.goto('/arcade')
+    await page.waitForLoadState('networkidle')
+
+    const returnButton = page.locator('button:has-text("Return to Arcade")')
+    if (await returnButton.isVisible({ timeout: 1000 }).catch(() => false)) {
+      await returnButton.click()
+      await page.waitForLoadState('networkidle')
+    }
+  })
+
+  test('should allow player modification in arcade lobby with no session', async ({ page }) => {
+    await page.goto('/arcade')
+    await page.waitForLoadState('networkidle')
+
+    // Look for add player button (should be enabled)
+    const addPlayerButton = page.locator('button:has-text("Add Player"), button:has-text("+")')
+    const firstButton = addPlayerButton.first()
+
+    if (await firstButton.isVisible({ timeout: 2000 }).catch(() => false)) {
+      // Should be clickable
+      await expect(firstButton).toBeEnabled()
+
+      // Try to click it
+      await firstButton.click()
+      await page.waitForTimeout(500)
+
+      // Should see player added
+      const activePlayer = page.locator('[data-testid="active-player"]')
+      await expect(activePlayer.first()).toBeVisible({ timeout: 3000 })
+    }
+  })
+
+  test('should block player modification during active game', async ({ page }) => {
+    // Start a game
+    await page.goto('/arcade/matching')
+    await page.waitForLoadState('networkidle')
+
+    // Start game
+    const startButton = page.locator('button:has-text("Start")')
+    if (await startButton.isVisible({ timeout: 2000 }).catch(() => false)) {
+      await startButton.click()
+      await page.waitForTimeout(1000)
+    }
+
+    // Look for player modification controls
+    // They should be disabled or have reduced opacity
+    const playerControls = page.locator('[data-testid="player-controls"], .player-list')
+    if (await playerControls.isVisible({ timeout: 1000 }).catch(() => false)) {
+      // Check if controls have pointer-events: none or low opacity
+      const opacity = await playerControls.evaluate((el) => {
+        return window.getComputedStyle(el).opacity
+      })
+
+      // If controls are visible, they should be dimmed (opacity < 1)
+      if (parseFloat(opacity) < 1) {
+        expect(parseFloat(opacity)).toBeLessThan(1)
+      }
+    }
+
+    // "Add Player" button should not be visible during game
+    const addPlayerButton = page.locator('button:has-text("Add Player")')
+    if (await addPlayerButton.isVisible({ timeout: 500 }).catch(() => false)) {
+      // If visible, should be disabled
+      const isDisabled = await addPlayerButton.isDisabled()
+      expect(isDisabled).toBe(true)
+    }
+  })
+
+  test('should show "Return to Arcade" button during game', async ({ page }) => {
+    // Start a game
+    await page.goto('/arcade/matching')
+    await page.waitForLoadState('networkidle')
+
+    // Look for "Return to Arcade" button
+    const returnButton = page.locator('button:has-text("Return to Arcade")')
+
+    // During game setup, might see "Setup" button instead
+    const setupButton = page.locator('button:has-text("Setup")')
+
+    // One of these should be visible
+    const hasReturnButton = await returnButton.isVisible({ timeout: 2000 }).catch(() => false)
+    const hasSetupButton = await setupButton.isVisible({ timeout: 2000 }).catch(() => false)
+
+    expect(hasReturnButton || hasSetupButton).toBe(true)
+  })
+
+  test('should NOT show "Setup" button in arcade lobby with no session', async ({ page }) => {
+    await page.goto('/arcade')
+    await page.waitForLoadState('networkidle')
+
+    // Should NOT see "Return to Arcade" or "Setup" button in lobby
+    const returnButton = page.locator('button:has-text("Return to Arcade")')
+    const setupButton = page.locator('button:has-text("Setup")')
+
+    const hasReturnButton = await returnButton.isVisible({ timeout: 1000 }).catch(() => false)
+    const hasSetupButton = await setupButton.isVisible({ timeout: 1000 }).catch(() => false)
+
+    // Neither should be visible in empty lobby
+    expect(hasReturnButton).toBe(false)
+    expect(hasSetupButton).toBe(false)
+  })
+})
+
+test.describe('Arcade Modal Session - Return to Arcade Button', () => {
+  test.beforeEach(async ({ page }) => {
+    // Clear session
+    await page.goto('/arcade')
+    await page.waitForLoadState('networkidle')
+  })
+
+  test('should end session and return to arcade when clicking "Return to Arcade"', async ({
+    page,
+  }) => {
+    // Start a game
+    await page.goto('/arcade/matching')
+    await page.waitForLoadState('networkidle')
+
+    // Start game if needed
+    const startButton = page.locator('button:has-text("Start")')
+    if (await startButton.isVisible({ timeout: 2000 }).catch(() => false)) {
+      await startButton.click()
+      await page.waitForTimeout(1000)
+    }
+
+    // Find and click "Return to Arcade" button
+    const returnButton = page.locator('button:has-text("Return to Arcade")')
+    if (await returnButton.isVisible({ timeout: 2000 }).catch(() => false)) {
+      await returnButton.click()
+      await page.waitForTimeout(1000)
+
+      // Should be redirected to arcade lobby
+      await expect(page).toHaveURL(/\/arcade\/?$/)
+
+      // Should see arcade lobby title
+      const title = page.locator('h1:has-text("Champion Arena")')
+      await expect(title).toBeVisible()
+
+      // Now should be able to modify players again
+      const addPlayerButton = page.locator('button:has-text("Add Player"), button:has-text("+")')
+      if (
+        await addPlayerButton
+          .first()
+          .isVisible({ timeout: 2000 })
+          .catch(() => false)
+      ) {
+        await expect(addPlayerButton.first()).toBeEnabled()
+      }
+    }
+  })
+
+  test('should allow navigating to different game after returning to arcade', async ({ page }) => {
+    // Start matching game
+    await page.goto('/arcade/matching')
+    await page.waitForLoadState('networkidle')
+
+    // Return to arcade
+    const returnButton = page.locator(
+      'button:has-text("Return to Arcade"), button:has-text("Setup")'
+    )
+    if (
+      await returnButton
+        .first()
+        .isVisible({ timeout: 2000 })
+        .catch(() => false)
+    ) {
+      await returnButton.first().click()
+      await page.waitForTimeout(1000)
+    }
+
+    // Should be in arcade lobby
+    await expect(page).toHaveURL(/\/arcade\/?$/)
+
+    // Now navigate to different game - should NOT redirect back to matching
+    await page.goto('/arcade/memory-quiz')
+    await page.waitForTimeout(2000)
+
+    // Should stay on memory-quiz (not redirect back to matching)
+    await expect(page).toHaveURL(/\/arcade\/memory-quiz/)
+
+    // Should see memory quiz title
+    const title = page.locator('h1:has-text("Memory Lightning")')
+    await expect(title).toBeVisible({ timeout: 3000 })
+  })
+})
+
+test.describe('Arcade Modal Session - Session Persistence', () => {
+  test('should maintain active session across page reloads', async ({ page }) => {
+    // Start a game
+    await page.goto('/arcade/matching')
+    await page.waitForLoadState('networkidle')
+
+    // Start game
+    const startButton = page.locator('button:has-text("Start")')
+    if (await startButton.isVisible({ timeout: 2000 }).catch(() => false)) {
+      await startButton.click()
+      await page.waitForTimeout(1000)
+    }
+
+    // Reload the page
+    await page.reload()
+    await page.waitForLoadState('networkidle')
+
+    // Should still be on matching game
+    await expect(page).toHaveURL(/\/arcade\/matching/)
+    const gameTitle = page.locator('h1:has-text("Memory Pairs")')
+    await expect(gameTitle).toBeVisible()
+
+    // Try to navigate to arcade
+    await page.goto('/arcade')
+    await page.waitForTimeout(2000)
+
+    // Should be redirected back to matching
+    await expect(page).toHaveURL(/\/arcade\/matching/)
+  })
+})

apps/web/e2e/mini-nav-persistence.spec.ts

@@ -1,7 +1,9 @@
-import { test, expect } from '@playwright/test'
+import { expect, test } from '@playwright/test'
 
 test.describe('Mini Navigation Game Name Persistence', () => {
-  test('should not show game name when navigating back to games page from a specific game', async ({ page }) => {
+  test('should not show game name when navigating back to games page from a specific game', async ({
+    page,
+  }) => {
     // Override baseURL for this test to match running dev server
     const baseURL = 'http://localhost:3000'
 
@@ -73,7 +75,9 @@ test.describe('Mini Navigation Game Name Persistence', () => {
     await expect(page.locator('text=🧠 Memory Lightning')).not.toBeVisible()
   })
 
-  test('should not persist game name when navigating through intermediate pages', async ({ page }) => {
+  test('should not persist game name when navigating through intermediate pages', async ({
+    page,
+  }) => {
     // Override baseURL for this test to match running dev server
     const baseURL = 'http://localhost:3000'
 
@@ -108,4 +112,4 @@ test.describe('Mini Navigation Game Name Persistence', () => {
     await expect(memoryLightningName).not.toBeVisible()
     await expect(memoryPairsName).not.toBeVisible()
   })
-})
+})

apps/web/e2e/nav-slot.spec.ts

@@ -1,7 +1,9 @@
-import { test, expect } from '@playwright/test'
+import { expect, test } from '@playwright/test'
 
 test.describe('Game navigation slots', () => {
-  test('should show Memory Pairs game name in nav when navigating to matching game', async ({ page }) => {
+  test('should show Memory Pairs game name in nav when navigating to matching game', async ({
+    page,
+  }) => {
     await page.goto('/games/matching')
 
     // Wait for the page to load
@@ -13,7 +15,9 @@ test.describe('Game navigation slots', () => {
     await expect(gameNav).toContainText('Memory Pairs')
   })
 
-  test('should show Memory Lightning game name in nav when navigating to memory quiz', async ({ page }) => {
+  test('should show Memory Lightning game name in nav when navigating to memory quiz', async ({
+    page,
+  }) => {
     await page.goto('/games/memory-quiz')
 
     // Wait for the page to load
@@ -70,4 +74,4 @@ test.describe('Game navigation slots', () => {
     const gameNavs = page.locator('h1:has-text("Memory Pairs"), h1:has-text("Memory Lightning")')
     await expect(gameNavs).toHaveCount(0)
   })
-})
+})

apps/web/e2e/sound-settings-persistence.spec.ts

@@ -1,4 +1,4 @@
-import { test, expect } from '@playwright/test'
+import { expect, test } from '@playwright/test'
 
 test.describe('Sound Settings Persistence', () => {
   test.beforeEach(async ({ page }) => {
@@ -14,13 +14,13 @@ test.describe('Sound Settings Persistence', () => {
     await page.getByRole('button', { name: /style/i }).click()
 
     // Find and toggle the sound switch (should be off by default)
-    const soundSwitch = page.locator('[role="switch"]').filter({ hasText: /sound/i }).or(
-      page.locator('input[type="checkbox"]').filter({ hasText: /sound/i })
-    ).or(
-      page.getByLabel(/sound/i)
-    ).or(
-      page.locator('button').filter({ hasText: /sound/i })
-    ).first()
+    const soundSwitch = page
+      .locator('[role="switch"]')
+      .filter({ hasText: /sound/i })
+      .or(page.locator('input[type="checkbox"]').filter({ hasText: /sound/i }))
+      .or(page.getByLabel(/sound/i))
+      .or(page.locator('button').filter({ hasText: /sound/i }))
+      .first()
 
     await soundSwitch.click()
 
@@ -37,13 +37,13 @@ test.describe('Sound Settings Persistence', () => {
     await page.reload()
     await page.getByRole('button', { name: /style/i }).click()
 
-    const soundSwitchAfterReload = page.locator('[role="switch"]').filter({ hasText: /sound/i }).or(
-      page.locator('input[type="checkbox"]').filter({ hasText: /sound/i })
-    ).or(
-      page.getByLabel(/sound/i)
-    ).or(
-      page.locator('button').filter({ hasText: /sound/i })
-    ).first()
+    const soundSwitchAfterReload = page
+      .locator('[role="switch"]')
+      .filter({ hasText: /sound/i })
+      .or(page.locator('input[type="checkbox"]').filter({ hasText: /sound/i }))
+      .or(page.getByLabel(/sound/i))
+      .or(page.locator('button').filter({ hasText: /sound/i }))
+      .first()
 
     await expect(soundSwitchAfterReload).toBeChecked()
   })
@@ -55,9 +55,10 @@ test.describe('Sound Settings Persistence', () => {
     await page.getByRole('button', { name: /style/i }).click()
 
     // Find volume slider
-    const volumeSlider = page.locator('input[type="range"]').or(
-      page.locator('[role="slider"]')
-    ).first()
+    const volumeSlider = page
+      .locator('input[type="range"]')
+      .or(page.locator('[role="slider"]'))
+      .first()
 
     // Set volume to a specific value (e.g., 0.6)
     await volumeSlider.fill('60') // Assuming 0-100 range
@@ -75,9 +76,10 @@ test.describe('Sound Settings Persistence', () => {
     await page.reload()
     await page.getByRole('button', { name: /style/i }).click()
 
-    const volumeSliderAfterReload = page.locator('input[type="range"]').or(
-      page.locator('[role="slider"]')
-    ).first()
+    const volumeSliderAfterReload = page
+      .locator('input[type="range"]')
+      .or(page.locator('[role="slider"]'))
+      .first()
 
     const volumeValue = await volumeSliderAfterReload.inputValue()
     expect(parseFloat(volumeValue)).toBeCloseTo(60, 0) // Allow for some variance
@@ -116,4 +118,4 @@ test.describe('Sound Settings Persistence', () => {
     expect(storedConfig.soundEnabled).toBe(true)
     expect(storedConfig.soundVolume).toBe(0.8)
   })
-})
+})

apps/web/eslint.config.js

@@ -0,0 +1,42 @@
+// Minimal ESLint flat config ONLY for react-hooks rules
+
+import tsParser from '@typescript-eslint/parser'
+import reactHooks from 'eslint-plugin-react-hooks'
+
+const config = [
+  { ignores: ['dist', '.next', 'coverage', 'node_modules', 'styled-system', 'storybook-static'] },
+  {
+    files: ['**/*.tsx', '**/*.ts', '**/*.jsx', '**/*.js'],
+    languageOptions: {
+      parser: tsParser,
+      ecmaVersion: 2022,
+      sourceType: 'module',
+      globals: {
+        React: 'readonly',
+        JSX: 'readonly',
+        console: 'readonly',
+        process: 'readonly',
+        module: 'readonly',
+        require: 'readonly',
+        window: 'readonly',
+        document: 'readonly',
+        localStorage: 'readonly',
+        sessionStorage: 'readonly',
+        fetch: 'readonly',
+        global: 'readonly',
+        Buffer: 'readonly',
+        __dirname: 'readonly',
+        __filename: 'readonly',
+      },
+    },
+    plugins: {
+      'react-hooks': reactHooks,
+    },
+    rules: {
+      'react-hooks/rules-of-hooks': 'error',
+      'react-hooks/exhaustive-deps': 'off',
+    },
+  },
+]
+
+export default config

apps/web/next.config.js

@@ -1,6 +1,5 @@
 /** @type {import('next').NextConfig} */
 const nextConfig = {
-  output: 'standalone',
   eslint: {
     ignoreDuringBuilds: true,
   },
@@ -64,4 +63,4 @@ const nextConfig = {
   },
 }
 
-module.exports = nextConfig
+module.exports = nextConfig

apps/web/package.json

@@ -3,27 +3,34 @@
   "version": "0.1.0",
   "private": true,
   "scripts": {
-    "dev": "concurrently \"next dev\" \"npx @pandacss/dev --watch\"",
-    "build": "next build",
-    "start": "next start",
-    "lint": "next lint",
+    "dev": "tsc -p tsconfig.server.json && tsc-alias -p tsconfig.server.json && concurrently \"node server.js\" \"npx @pandacss/dev --watch\"",
+    "build": "node scripts/generate-build-info.js && tsc -p tsconfig.server.json && tsc-alias -p tsconfig.server.json && next build",
+    "start": "NODE_ENV=production node server.js",
+    "lint": "npx @biomejs/biome lint . && npx eslint .",
+    "lint:fix": "npx @biomejs/biome lint . --write && npx eslint . --fix",
+    "format": "npx @biomejs/biome format . --write",
+    "format:check": "npx @biomejs/biome format .",
+    "check": "npx @biomejs/biome check .",
+    "pre-commit": "npm run type-check && npm run format && npm run lint:fix && npm run lint",
     "test": "vitest",
     "test:run": "vitest run",
     "type-check": "tsc --noEmit",
     "clean": "rm -rf .next",
     "storybook": "storybook dev -p 6006",
-    "build-storybook": "storybook build"
+    "build-storybook": "storybook build",
+    "db:generate": "drizzle-kit generate",
+    "db:migrate": "tsx src/db/migrate.ts",
+    "db:push": "drizzle-kit push",
+    "db:studio": "drizzle-kit studio",
+    "db:drop": "drizzle-kit drop"
   },
   "dependencies": {
     "@dnd-kit/core": "^6.3.1",
     "@dnd-kit/sortable": "^10.0.0",
     "@dnd-kit/utilities": "^3.2.2",
-    "@myriaddreamin/typst-all-in-one.ts": "0.6.1-rc3",
-    "@myriaddreamin/typst-ts-renderer": "0.6.1-rc3",
-    "@myriaddreamin/typst-ts-web-compiler": "0.6.1-rc3",
-    "@myriaddreamin/typst.ts": "0.6.1-rc3",
     "@number-flow/react": "^0.5.10",
     "@pandacss/dev": "^0.20.0",
+    "@paralleldrive/cuid2": "^2.2.2",
     "@radix-ui/react-accordion": "^1.1.2",
     "@radix-ui/react-checkbox": "^1.0.4",
     "@radix-ui/react-dialog": "^1.0.5",
@@ -45,15 +52,23 @@
     "@soroban/core": "workspace:*",
     "@soroban/templates": "workspace:*",
     "@tanstack/react-form": "^0.19.0",
+    "@tanstack/react-query": "^5.90.2",
     "@types/jsdom": "^21.1.7",
+    "better-sqlite3": "^12.4.1",
+    "drizzle-orm": "^0.44.6",
     "emojibase-data": "^16.0.3",
+    "jose": "^6.1.0",
     "lucide-react": "^0.294.0",
     "make-plural": "^7.4.0",
+    "nanoid": "^5.1.6",
     "next": "^14.2.32",
+    "next-auth": "5.0.0-beta.29",
     "python-bridge": "^1.1.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
-    "react-resizable-layout": "^0.7.3"
+    "react-resizable-layout": "^0.7.3",
+    "socket.io": "^4.8.1",
+    "socket.io-client": "^4.8.1"
   },
   "devDependencies": {
     "@playwright/test": "^1.55.1",
@@ -62,17 +77,21 @@
     "@storybook/nextjs": "^9.1.7",
     "@testing-library/jest-dom": "^6.8.0",
     "@testing-library/react": "^16.3.0",
+    "@types/better-sqlite3": "^7.6.13",
     "@types/node": "^20.0.0",
     "@types/react": "^18.2.0",
     "@types/react-dom": "^18.2.0",
     "@vitejs/plugin-react": "^5.0.2",
     "concurrently": "^8.0.0",
+    "drizzle-kit": "^0.31.5",
     "eslint": "^8.0.0",
     "eslint-config-next": "^14.0.0",
     "eslint-plugin-storybook": "^9.1.7",
     "happy-dom": "^18.0.1",
     "jsdom": "^27.0.0",
     "storybook": "^9.1.7",
+    "tsc-alias": "^1.8.16",
+    "tsx": "^4.20.5",
     "typescript": "^5.0.0",
     "vitest": "^1.0.0"
   },

apps/web/panda.config.ts

@@ -36,19 +36,81 @@ export default defineConfig({
             wood: { value: '#8B4513' },
             bead: { value: '#2C1810' },
             inactive: { value: '#D3D3D3' },
-            bar: { value: '#654321' }
-          }
+            bar: { value: '#654321' },
+          },
         },
         fonts: {
-          body: { value: 'Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif' },
-          heading: { value: 'Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif' },
-          mono: { value: 'Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace' }
+          body: {
+            value: 'Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif',
+          },
+          heading: {
+            value: 'Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif',
+          },
+          mono: {
+            value: 'Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace',
+          },
         },
         shadows: {
           card: { value: '0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06)' },
-          modal: { value: '0 25px 50px -12px rgba(0, 0, 0, 0.25)' }
-        }
-      }
-    }
-  }
-})
+          modal: { value: '0 25px 50px -12px rgba(0, 0, 0, 0.25)' },
+        },
+        animations: {
+          // Shake animation for errors (web_generator.py line 3419)
+          shake: { value: 'shake 0.5s ease-in-out' },
+          // Pulse animation for success feedback (line 2004)
+          successPulse: { value: 'successPulse 0.5s ease' },
+          pulse: { value: 'pulse 2s infinite' },
+          // Error shake with larger amplitude (line 2009)
+          errorShake: { value: 'errorShake 0.5s ease' },
+          // Bounce animations (line 6271, 5065)
+          bounce: { value: 'bounce 1s infinite alternate' },
+          bounceIn: { value: 'bounceIn 1s ease-out' },
+          // Glow animation (line 6260)
+          glow: { value: 'glow 1s ease-in-out infinite alternate' },
+        },
+      },
+      keyframes: {
+        // Shake - horizontal oscillation for errors (line 3419)
+        shake: {
+          '0%, 100%': { transform: 'translateX(0)' },
+          '25%': { transform: 'translateX(-5px)' },
+          '75%': { transform: 'translateX(5px)' },
+        },
+        // Success pulse - gentle scale for correct answers (line 2004)
+        successPulse: {
+          '0%, 100%': { transform: 'scale(1)' },
+          '50%': { transform: 'scale(1.05)' },
+        },
+        // Pulse - continuous breathing effect (line 6255)
+        pulse: {
+          '0%, 100%': { transform: 'scale(1)' },
+          '50%': { transform: 'scale(1.05)' },
+        },
+        // Error shake - stronger horizontal oscillation (line 2009)
+        errorShake: {
+          '0%, 100%': { transform: 'translateX(0)' },
+          '25%': { transform: 'translateX(-10px)' },
+          '75%': { transform: 'translateX(10px)' },
+        },
+        // Bounce - vertical oscillation (line 6271)
+        bounce: {
+          '0%, 100%': { transform: 'translateY(0)' },
+          '50%': { transform: 'translateY(-10px)' },
+        },
+        // Bounce in - entry animation with scale and rotate (line 6265)
+        bounceIn: {
+          '0%': { transform: 'scale(0.3) rotate(-10deg)', opacity: '0' },
+          '50%': { transform: 'scale(1.1) rotate(5deg)' },
+          '100%': { transform: 'scale(1) rotate(0deg)', opacity: '1' },
+        },
+        // Glow - expanding box shadow (line 6260)
+        glow: {
+          '0%': { boxShadow: '0 0 5px rgba(255, 255, 255, 0.5)' },
+          '100%': {
+            boxShadow: '0 0 20px rgba(255, 255, 255, 0.8), 0 0 30px rgba(255, 255, 255, 0.6)',
+          },
+        },
+      },
+    },
+  },
+})

apps/web/playwright.config.ts

@@ -24,4 +24,4 @@ export default defineConfig({
     url: 'http://localhost:3002',
     reuseExistingServer: !process.env.CI,
   },
-})
+})

apps/web/pnpm-lock.yaml

@@ -0,0 +1,445 @@
+lockfileVersion: '9.0'
+
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false
+
+importers:
+
+  .:
+    dependencies:
+      '@radix-ui/react-tooltip':
+        specifier: ^1.2.8
+        version: 1.2.8(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      '@soroban/abacus-react':
+        specifier: workspace:*
+        version: link:../../packages/abacus-react
+      '@soroban/client':
+        specifier: workspace:*
+        version: link:../../packages/core/client/typescript
+      '@soroban/core':
+        specifier: workspace:*
+        version: link:../../packages/core/client/node
+      '@soroban/templates':
+        specifier: workspace:*
+        version: link:../../packages/templates
+      react:
+        specifier: ^18.2.0
+        version: 18.3.1
+      react-dom:
+        specifier: ^18.2.0
+        version: 18.3.1(react@18.3.1)
+
+packages:
+
+  '@floating-ui/core@1.7.3':
+    resolution: {integrity: sha512-sGnvb5dmrJaKEZ+LDIpguvdX3bDlEllmv4/ClQ9awcmCZrlx5jQyyMWFM5kBI+EyNOCDDiKk8il0zeuX3Zlg/w==}
+
+  '@floating-ui/dom@1.7.4':
+    resolution: {integrity: sha512-OOchDgh4F2CchOX94cRVqhvy7b3AFb+/rQXyswmzmGakRfkMgoWVjfnLWkRirfLEfuD4ysVW16eXzwt3jHIzKA==}
+
+  '@floating-ui/react-dom@2.1.6':
+    resolution: {integrity: sha512-4JX6rEatQEvlmgU80wZyq9RT96HZJa88q8hp0pBd+LrczeDI4o6uA2M+uvxngVHo4Ihr8uibXxH6+70zhAFrVw==}
+    peerDependencies:
+      react: '>=16.8.0'
+      react-dom: '>=16.8.0'
+
+  '@floating-ui/utils@0.2.10':
+    resolution: {integrity: sha512-aGTxbpbg8/b5JfU1HXSrbH3wXZuLPJcNEcZQFMxLs3oSzgtVu6nFPkbbGGUvBcUjKV2YyB9Wxxabo+HEH9tcRQ==}
+
+  '@radix-ui/primitive@1.1.3':
+    resolution: {integrity: sha512-JTF99U/6XIjCBo0wqkU5sK10glYe27MRRsfwoiq5zzOEZLHU3A3KCMa5X/azekYRCJ0HlwI0crAXS/5dEHTzDg==}
+
+  '@radix-ui/react-arrow@1.1.7':
+    resolution: {integrity: sha512-F+M1tLhO+mlQaOWspE8Wstg+z6PwxwRd8oQ8IXceWz92kfAmalTRf0EjrouQeo7QssEPfCn05B4Ihs1K9WQ/7w==}
+    peerDependencies:
+      '@types/react': '*'
+      '@types/react-dom': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      '@types/react-dom':
+        optional: true
+
+  '@radix-ui/react-compose-refs@1.1.2':
+    resolution: {integrity: sha512-z4eqJvfiNnFMHIIvXP3CY57y2WJs5g2v3X0zm9mEJkrkNv4rDxu+sg9Jh8EkXyeqBkB7SOcboo9dMVqhyrACIg==}
+    peerDependencies:
+      '@types/react': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+
+  '@radix-ui/react-context@1.1.2':
+    resolution: {integrity: sha512-jCi/QKUM2r1Ju5a3J64TH2A5SpKAgh0LpknyqdQ4m6DCV0xJ2HG1xARRwNGPQfi1SLdLWZ1OJz6F4OMBBNiGJA==}
+    peerDependencies:
+      '@types/react': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+
+  '@radix-ui/react-dismissable-layer@1.1.11':
+    resolution: {integrity: sha512-Nqcp+t5cTB8BinFkZgXiMJniQH0PsUt2k51FUhbdfeKvc4ACcG2uQniY/8+h1Yv6Kza4Q7lD7PQV0z0oicE0Mg==}
+    peerDependencies:
+      '@types/react': '*'
+      '@types/react-dom': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      '@types/react-dom':
+        optional: true
+
+  '@radix-ui/react-id@1.1.1':
+    resolution: {integrity: sha512-kGkGegYIdQsOb4XjsfM97rXsiHaBwco+hFI66oO4s9LU+PLAC5oJ7khdOVFxkhsmlbpUqDAvXw11CluXP+jkHg==}
+    peerDependencies:
+      '@types/react': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+
+  '@radix-ui/react-popper@1.2.8':
+    resolution: {integrity: sha512-0NJQ4LFFUuWkE7Oxf0htBKS6zLkkjBH+hM1uk7Ng705ReR8m/uelduy1DBo0PyBXPKVnBA6YBlU94MBGXrSBCw==}
+    peerDependencies:
+      '@types/react': '*'
+      '@types/react-dom': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      '@types/react-dom':
+        optional: true
+
+  '@radix-ui/react-portal@1.1.9':
+    resolution: {integrity: sha512-bpIxvq03if6UNwXZ+HTK71JLh4APvnXntDc6XOX8UVq4XQOVl7lwok0AvIl+b8zgCw3fSaVTZMpAPPagXbKmHQ==}
+    peerDependencies:
+      '@types/react': '*'
+      '@types/react-dom': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      '@types/react-dom':
+        optional: true
+
+  '@radix-ui/react-presence@1.1.5':
+    resolution: {integrity: sha512-/jfEwNDdQVBCNvjkGit4h6pMOzq8bHkopq458dPt2lMjx+eBQUohZNG9A7DtO/O5ukSbxuaNGXMjHicgwy6rQQ==}
+    peerDependencies:
+      '@types/react': '*'
+      '@types/react-dom': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      '@types/react-dom':
+        optional: true
+
+  '@radix-ui/react-primitive@2.1.3':
+    resolution: {integrity: sha512-m9gTwRkhy2lvCPe6QJp4d3G1TYEUHn/FzJUtq9MjH46an1wJU+GdoGC5VLof8RX8Ft/DlpshApkhswDLZzHIcQ==}
+    peerDependencies:
+      '@types/react': '*'
+      '@types/react-dom': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      '@types/react-dom':
+        optional: true
+
+  '@radix-ui/react-slot@1.2.3':
+    resolution: {integrity: sha512-aeNmHnBxbi2St0au6VBVC7JXFlhLlOnvIIlePNniyUNAClzmtAUEY8/pBiK3iHjufOlwA+c20/8jngo7xcrg8A==}
+    peerDependencies:
+      '@types/react': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+
+  '@radix-ui/react-tooltip@1.2.8':
+    resolution: {integrity: sha512-tY7sVt1yL9ozIxvmbtN5qtmH2krXcBCfjEiCgKGLqunJHvgvZG2Pcl2oQ3kbcZARb1BGEHdkLzcYGO8ynVlieg==}
+    peerDependencies:
+      '@types/react': '*'
+      '@types/react-dom': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      '@types/react-dom':
+        optional: true
+
+  '@radix-ui/react-use-callback-ref@1.1.1':
+    resolution: {integrity: sha512-FkBMwD+qbGQeMu1cOHnuGB6x4yzPjho8ap5WtbEJ26umhgqVXbhekKUQO+hZEL1vU92a3wHwdp0HAcqAUF5iDg==}
+    peerDependencies:
+      '@types/react': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+
+  '@radix-ui/react-use-controllable-state@1.2.2':
+    resolution: {integrity: sha512-BjasUjixPFdS+NKkypcyyN5Pmg83Olst0+c6vGov0diwTEo6mgdqVR6hxcEgFuh4QrAs7Rc+9KuGJ9TVCj0Zzg==}
+    peerDependencies:
+      '@types/react': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+
+  '@radix-ui/react-use-effect-event@0.0.2':
+    resolution: {integrity: sha512-Qp8WbZOBe+blgpuUT+lw2xheLP8q0oatc9UpmiemEICxGvFLYmHm9QowVZGHtJlGbS6A6yJ3iViad/2cVjnOiA==}
+    peerDependencies:
+      '@types/react': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+
+  '@radix-ui/react-use-escape-keydown@1.1.1':
+    resolution: {integrity: sha512-Il0+boE7w/XebUHyBjroE+DbByORGR9KKmITzbR7MyQ4akpORYP/ZmbhAr0DG7RmmBqoOnZdy2QlvajJ2QA59g==}
+    peerDependencies:
+      '@types/react': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+
+  '@radix-ui/react-use-layout-effect@1.1.1':
+    resolution: {integrity: sha512-RbJRS4UWQFkzHTTwVymMTUv8EqYhOp8dOOviLj2ugtTiXRaRQS7GLGxZTLL1jWhMeoSCf5zmcZkqTl9IiYfXcQ==}
+    peerDependencies:
+      '@types/react': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+
+  '@radix-ui/react-use-rect@1.1.1':
+    resolution: {integrity: sha512-QTYuDesS0VtuHNNvMh+CjlKJ4LJickCMUAqjlE3+j8w+RlRpwyX3apEQKGFzbZGdo7XNG1tXa+bQqIE7HIXT2w==}
+    peerDependencies:
+      '@types/react': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+
+  '@radix-ui/react-use-size@1.1.1':
+    resolution: {integrity: sha512-ewrXRDTAqAXlkl6t/fkXWNAhFX9I+CkKlw6zjEwk86RSPKwZr3xpBRso655aqYafwtnbpHLj6toFzmd6xdVptQ==}
+    peerDependencies:
+      '@types/react': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+
+  '@radix-ui/react-visually-hidden@1.2.3':
+    resolution: {integrity: sha512-pzJq12tEaaIhqjbzpCuv/OypJY/BPavOofm+dbab+MHLajy277+1lLm6JFcGgF5eskJ6mquGirhXY2GD/8u8Ug==}
+    peerDependencies:
+      '@types/react': '*'
+      '@types/react-dom': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      '@types/react-dom':
+        optional: true
+
+  '@radix-ui/rect@1.1.1':
+    resolution: {integrity: sha512-HPwpGIzkl28mWyZqG52jiqDJ12waP11Pa1lGoiyUkIEuMLBP0oeK/C89esbXrxsky5we7dfd8U58nm0SgAWpVw==}
+
+  js-tokens@4.0.0:
+    resolution: {integrity: sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==}
+
+  loose-envify@1.4.0:
+    resolution: {integrity: sha512-lyuxPGr/Wfhrlem2CL/UcnUc1zcqKAImBDzukY7Y5F/yQiNdko6+fRLevlw1HgMySw7f611UIY408EtxRSoK3Q==}
+    hasBin: true
+
+  react-dom@18.3.1:
+    resolution: {integrity: sha512-5m4nQKp+rZRb09LNH59GM4BxTh9251/ylbKIbpe7TpGxfJ+9kv6BLkLBXIjjspbgbnIBNqlI23tRnTWT0snUIw==}
+    peerDependencies:
+      react: ^18.3.1
+
+  react@18.3.1:
+    resolution: {integrity: sha512-wS+hAgJShR0KhEvPJArfuPVN1+Hz1t0Y6n5jLrGQbkb4urgPE/0Rve+1kMB1v/oWgHgm4WIcV+i7F2pTVj+2iQ==}
+    engines: {node: '>=0.10.0'}
+
+  scheduler@0.23.2:
+    resolution: {integrity: sha512-UOShsPwz7NrMUqhR6t0hWjFduvOzbtv7toDH1/hIrfRNIDBnnBWd0CwJTGvTpngVlmwGCdP9/Zl/tVrDqcuYzQ==}
+
+snapshots:
+
+  '@floating-ui/core@1.7.3':
+    dependencies:
+      '@floating-ui/utils': 0.2.10
+
+  '@floating-ui/dom@1.7.4':
+    dependencies:
+      '@floating-ui/core': 1.7.3
+      '@floating-ui/utils': 0.2.10
+
+  '@floating-ui/react-dom@2.1.6(react-dom@18.3.1(react@18.3.1))(react@18.3.1)':
+    dependencies:
+      '@floating-ui/dom': 1.7.4
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
+
+  '@floating-ui/utils@0.2.10': {}
+
+  '@radix-ui/primitive@1.1.3': {}
+
+  '@radix-ui/react-arrow@1.1.7(react-dom@18.3.1(react@18.3.1))(react@18.3.1)':
+    dependencies:
+      '@radix-ui/react-primitive': 2.1.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
+
+  '@radix-ui/react-compose-refs@1.1.2(react@18.3.1)':
+    dependencies:
+      react: 18.3.1
+
+  '@radix-ui/react-context@1.1.2(react@18.3.1)':
+    dependencies:
+      react: 18.3.1
+
+  '@radix-ui/react-dismissable-layer@1.1.11(react-dom@18.3.1(react@18.3.1))(react@18.3.1)':
+    dependencies:
+      '@radix-ui/primitive': 1.1.3
+      '@radix-ui/react-compose-refs': 1.1.2(react@18.3.1)
+      '@radix-ui/react-primitive': 2.1.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      '@radix-ui/react-use-callback-ref': 1.1.1(react@18.3.1)
+      '@radix-ui/react-use-escape-keydown': 1.1.1(react@18.3.1)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
+
+  '@radix-ui/react-id@1.1.1(react@18.3.1)':
+    dependencies:
+      '@radix-ui/react-use-layout-effect': 1.1.1(react@18.3.1)
+      react: 18.3.1
+
+  '@radix-ui/react-popper@1.2.8(react-dom@18.3.1(react@18.3.1))(react@18.3.1)':
+    dependencies:
+      '@floating-ui/react-dom': 2.1.6(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      '@radix-ui/react-arrow': 1.1.7(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      '@radix-ui/react-compose-refs': 1.1.2(react@18.3.1)
+      '@radix-ui/react-context': 1.1.2(react@18.3.1)
+      '@radix-ui/react-primitive': 2.1.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      '@radix-ui/react-use-callback-ref': 1.1.1(react@18.3.1)
+      '@radix-ui/react-use-layout-effect': 1.1.1(react@18.3.1)
+      '@radix-ui/react-use-rect': 1.1.1(react@18.3.1)
+      '@radix-ui/react-use-size': 1.1.1(react@18.3.1)
+      '@radix-ui/rect': 1.1.1
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
+
+  '@radix-ui/react-portal@1.1.9(react-dom@18.3.1(react@18.3.1))(react@18.3.1)':
+    dependencies:
+      '@radix-ui/react-primitive': 2.1.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      '@radix-ui/react-use-layout-effect': 1.1.1(react@18.3.1)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
+
+  '@radix-ui/react-presence@1.1.5(react-dom@18.3.1(react@18.3.1))(react@18.3.1)':
+    dependencies:
+      '@radix-ui/react-compose-refs': 1.1.2(react@18.3.1)
+      '@radix-ui/react-use-layout-effect': 1.1.1(react@18.3.1)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
+
+  '@radix-ui/react-primitive@2.1.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1)':
+    dependencies:
+      '@radix-ui/react-slot': 1.2.3(react@18.3.1)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
+
+  '@radix-ui/react-slot@1.2.3(react@18.3.1)':
+    dependencies:
+      '@radix-ui/react-compose-refs': 1.1.2(react@18.3.1)
+      react: 18.3.1
+
+  '@radix-ui/react-tooltip@1.2.8(react-dom@18.3.1(react@18.3.1))(react@18.3.1)':
+    dependencies:
+      '@radix-ui/primitive': 1.1.3
+      '@radix-ui/react-compose-refs': 1.1.2(react@18.3.1)
+      '@radix-ui/react-context': 1.1.2(react@18.3.1)
+      '@radix-ui/react-dismissable-layer': 1.1.11(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      '@radix-ui/react-id': 1.1.1(react@18.3.1)
+      '@radix-ui/react-popper': 1.2.8(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      '@radix-ui/react-portal': 1.1.9(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      '@radix-ui/react-presence': 1.1.5(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      '@radix-ui/react-primitive': 2.1.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      '@radix-ui/react-slot': 1.2.3(react@18.3.1)
+      '@radix-ui/react-use-controllable-state': 1.2.2(react@18.3.1)
+      '@radix-ui/react-visually-hidden': 1.2.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
+
+  '@radix-ui/react-use-callback-ref@1.1.1(react@18.3.1)':
+    dependencies:
+      react: 18.3.1
+
+  '@radix-ui/react-use-controllable-state@1.2.2(react@18.3.1)':
+    dependencies:
+      '@radix-ui/react-use-effect-event': 0.0.2(react@18.3.1)
+      '@radix-ui/react-use-layout-effect': 1.1.1(react@18.3.1)
+      react: 18.3.1
+
+  '@radix-ui/react-use-effect-event@0.0.2(react@18.3.1)':
+    dependencies:
+      '@radix-ui/react-use-layout-effect': 1.1.1(react@18.3.1)
+      react: 18.3.1
+
+  '@radix-ui/react-use-escape-keydown@1.1.1(react@18.3.1)':
+    dependencies:
+      '@radix-ui/react-use-callback-ref': 1.1.1(react@18.3.1)
+      react: 18.3.1
+
+  '@radix-ui/react-use-layout-effect@1.1.1(react@18.3.1)':
+    dependencies:
+      react: 18.3.1
+
+  '@radix-ui/react-use-rect@1.1.1(react@18.3.1)':
+    dependencies:
+      '@radix-ui/rect': 1.1.1
+      react: 18.3.1
+
+  '@radix-ui/react-use-size@1.1.1(react@18.3.1)':
+    dependencies:
+      '@radix-ui/react-use-layout-effect': 1.1.1(react@18.3.1)
+      react: 18.3.1
+
+  '@radix-ui/react-visually-hidden@1.2.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1)':
+    dependencies:
+      '@radix-ui/react-primitive': 2.1.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
+
+  '@radix-ui/rect@1.1.1': {}
+
+  js-tokens@4.0.0: {}
+
+  loose-envify@1.4.0:
+    dependencies:
+      js-tokens: 4.0.0
+
+  react-dom@18.3.1(react@18.3.1):
+    dependencies:
+      loose-envify: 1.4.0
+      react: 18.3.1
+      scheduler: 0.23.2
+
+  react@18.3.1:
+    dependencies:
+      loose-envify: 1.4.0
+
+  scheduler@0.23.2:
+    dependencies:
+      loose-envify: 1.4.0

apps/web/scripts/generate-build-info.js

@@ -0,0 +1,58 @@
+#!/usr/bin/env node
+
+/**
+ * Generate build information for deployment tracking
+ * This script captures git commit, branch, timestamp, and other metadata
+ */
+
+const { execSync } = require('child_process')
+const fs = require('fs')
+const path = require('path')
+
+function exec(command) {
+  try {
+    return execSync(command, { encoding: 'utf-8' }).trim()
+  } catch (_error) {
+    return null
+  }
+}
+
+function getBuildInfo() {
+  const gitCommit = exec('git rev-parse HEAD')
+  const gitCommitShort = exec('git rev-parse --short HEAD')
+  const gitBranch = exec('git rev-parse --abbrev-ref HEAD')
+  const gitTag = exec('git describe --tags --exact-match 2>/dev/null')
+  const gitDirty = exec('git diff --quiet || echo "dirty"') === 'dirty'
+
+  const packageJson = require('../package.json')
+
+  return {
+    version: packageJson.version,
+    buildTime: new Date().toISOString(),
+    buildTimestamp: Date.now(),
+    git: {
+      commit: gitCommit,
+      commitShort: gitCommitShort,
+      branch: gitBranch,
+      tag: gitTag,
+      isDirty: gitDirty,
+    },
+    environment: process.env.NODE_ENV || 'development',
+    buildNumber: process.env.BUILD_NUMBER || null,
+    nodeVersion: process.version,
+  }
+}
+
+const buildInfo = getBuildInfo()
+const outputPath = path.join(__dirname, '..', 'src', 'generated', 'build-info.json')
+
+// Ensure directory exists
+const dir = path.dirname(outputPath)
+if (!fs.existsSync(dir)) {
+  fs.mkdirSync(dir, { recursive: true })
+}
+
+fs.writeFileSync(outputPath, JSON.stringify(buildInfo, null, 2))
+
+console.log('✅ Build info generated:', outputPath)
+console.log(JSON.stringify(buildInfo, null, 2))

apps/web/server.js

@@ -0,0 +1,49 @@
+const { createServer } = require('http')
+const { parse } = require('url')
+const next = require('next')
+
+const dev = process.env.NODE_ENV !== 'production'
+const hostname = 'localhost'
+const port = parseInt(process.env.PORT || '3000', 10)
+
+const app = next({ dev, hostname, port })
+const handle = app.getRequestHandler()
+
+// Run migrations before starting server
+console.log('🔄 Running database migrations...')
+const { migrate } = require('drizzle-orm/better-sqlite3/migrator')
+const { db } = require('./src/db/index.js')
+
+try {
+  migrate(db, { migrationsFolder: './drizzle' })
+  console.log('✅ Migrations complete')
+} catch (error) {
+  console.error('❌ Migration failed:', error)
+  process.exit(1)
+}
+
+app.prepare().then(() => {
+  const server = createServer(async (req, res) => {
+    try {
+      const parsedUrl = parse(req.url, true)
+      await handle(req, res, parsedUrl)
+    } catch (err) {
+      console.error('Error occurred handling', req.url, err)
+      res.statusCode = 500
+      res.end('internal server error')
+    }
+  })
+
+  // Initialize Socket.IO
+  const { initializeSocketServer } = require('./socket-server.js')
+  initializeSocketServer(server)
+
+  server
+    .once('error', (err) => {
+      console.error(err)
+      process.exit(1)
+    })
+    .listen(port, () => {
+      console.log(`> Ready on http://${hostname}:${port}`)
+    })
+})

apps/web/socket-server.js

@@ -0,0 +1,319 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.getSocketIO = getSocketIO;
+exports.initializeSocketServer = initializeSocketServer;
+const socket_io_1 = require("socket.io");
+const session_manager_1 = require("./src/lib/arcade/session-manager");
+const room_manager_1 = require("./src/lib/arcade/room-manager");
+const room_membership_1 = require("./src/lib/arcade/room-membership");
+const player_manager_1 = require("./src/lib/arcade/player-manager");
+const MatchingGameValidator_1 = require("./src/lib/arcade/validation/MatchingGameValidator");
+/**
+ * Get the socket.io server instance
+ * Returns null if not initialized
+ */
+function getSocketIO() {
+    return globalThis.__socketIO || null;
+}
+function initializeSocketServer(httpServer) {
+    const io = new socket_io_1.Server(httpServer, {
+        path: '/api/socket',
+        cors: {
+            origin: process.env.NEXT_PUBLIC_URL || 'http://localhost:3000',
+            credentials: true,
+        },
+    });
+    io.on('connection', (socket) => {
+        console.log('🔌 Client connected:', socket.id);
+        let currentUserId = null;
+        // Join arcade session room
+        socket.on('join-arcade-session', async ({ userId, roomId }) => {
+            currentUserId = userId;
+            socket.join(`arcade:${userId}`);
+            console.log(`👤 User ${userId} joined arcade room`);
+            // If this session is part of a room, also join the game room for multi-user sync
+            if (roomId) {
+                socket.join(`game:${roomId}`);
+                console.log(`🎮 User ${userId} joined game room ${roomId}`);
+            }
+            // Send current session state if exists
+            // For room-based games, look up shared room session
+            try {
+                const session = roomId
+                    ? await (0, session_manager_1.getArcadeSessionByRoom)(roomId)
+                    : await (0, session_manager_1.getArcadeSession)(userId);
+                if (session) {
+                    console.log('[join-arcade-session] Found session:', {
+                        userId,
+                        roomId,
+                        version: session.version,
+                        sessionUserId: session.userId,
+                    });
+                    socket.emit('session-state', {
+                        gameState: session.gameState,
+                        currentGame: session.currentGame,
+                        gameUrl: session.gameUrl,
+                        activePlayers: session.activePlayers,
+                        version: session.version,
+                    });
+                }
+                else {
+                    console.log('[join-arcade-session] No active session found for:', {
+                        userId,
+                        roomId,
+                    });
+                    socket.emit('no-active-session');
+                }
+            }
+            catch (error) {
+                console.error('Error fetching session:', error);
+                socket.emit('session-error', { error: 'Failed to fetch session' });
+            }
+        });
+        // Handle game moves
+        socket.on('game-move', async (data) => {
+            console.log('🎮 Game move received:', {
+                userId: data.userId,
+                moveType: data.move.type,
+                playerId: data.move.playerId,
+                timestamp: data.move.timestamp,
+                roomId: data.roomId,
+                fullMove: JSON.stringify(data.move, null, 2),
+            });
+            try {
+                // Special handling for START_GAME - create session if it doesn't exist
+                if (data.move.type === 'START_GAME') {
+                    // For room-based games, check if room session exists
+                    const existingSession = data.roomId
+                        ? await (0, session_manager_1.getArcadeSessionByRoom)(data.roomId)
+                        : await (0, session_manager_1.getArcadeSession)(data.userId);
+                    if (!existingSession) {
+                        console.log('🎯 Creating new session for START_GAME');
+                        // activePlayers must be provided in the START_GAME move data
+                        const activePlayers = data.move.data?.activePlayers;
+                        if (!activePlayers || activePlayers.length === 0) {
+                            console.error('❌ START_GAME move missing activePlayers');
+                            socket.emit('move-rejected', {
+                                error: 'START_GAME requires at least one active player',
+                                move: data.move,
+                            });
+                            return;
+                        }
+                        // Get initial state from validator
+                        const initialState = MatchingGameValidator_1.matchingGameValidator.getInitialState({
+                            difficulty: 6,
+                            gameType: 'abacus-numeral',
+                            turnTimer: 30,
+                        });
+                        // Check if user is already in a room for this game
+                        const userRoomIds = await (0, room_membership_1.getUserRooms)(data.userId);
+                        let room = null;
+                        // Look for an existing active room for this game
+                        for (const roomId of userRoomIds) {
+                            const existingRoom = await (0, room_manager_1.getRoomById)(roomId);
+                            if (existingRoom &&
+                                existingRoom.gameName === 'matching' &&
+                                existingRoom.status !== 'finished') {
+                                room = existingRoom;
+                                console.log('🏠 Using existing room:', room.code);
+                                break;
+                            }
+                        }
+                        // If no suitable room exists, create a new one
+                        if (!room) {
+                            room = await (0, room_manager_1.createRoom)({
+                                name: 'Auto-generated Room',
+                                createdBy: data.userId,
+                                creatorName: 'Player',
+                                gameName: 'matching',
+                                gameConfig: {
+                                    difficulty: 6,
+                                    gameType: 'abacus-numeral',
+                                    turnTimer: 30,
+                                },
+                                ttlMinutes: 60,
+                            });
+                            console.log('🏠 Created new room:', room.code);
+                        }
+                        // Now create the session linked to the room
+                        await (0, session_manager_1.createArcadeSession)({
+                            userId: data.userId,
+                            gameName: 'matching',
+                            gameUrl: '/arcade/room', // Room-based sessions use /arcade/room
+                            initialState,
+                            activePlayers,
+                            roomId: room.id,
+                        });
+                        console.log('✅ Session created successfully with room association');
+                        // Notify all connected clients about the new session
+                        const newSession = await (0, session_manager_1.getArcadeSession)(data.userId);
+                        if (newSession) {
+                            io.to(`arcade:${data.userId}`).emit('session-state', {
+                                gameState: newSession.gameState,
+                                currentGame: newSession.currentGame,
+                                gameUrl: newSession.gameUrl,
+                                activePlayers: newSession.activePlayers,
+                                version: newSession.version,
+                            });
+                            console.log('📢 Emitted session-state to notify clients of new session');
+                        }
+                    }
+                }
+                // Apply game move - use roomId for room-based games to access shared session
+                const result = await (0, session_manager_1.applyGameMove)(data.userId, data.move, data.roomId);
+                if (result.success && result.session) {
+                    const moveAcceptedData = {
+                        gameState: result.session.gameState,
+                        version: result.session.version,
+                        move: data.move,
+                    };
+                    // Broadcast the updated state to all devices for this user
+                    io.to(`arcade:${data.userId}`).emit('move-accepted', moveAcceptedData);
+                    // If this is a room-based session, ALSO broadcast to all users in the room
+                    if (result.session.roomId) {
+                        io.to(`game:${result.session.roomId}`).emit('move-accepted', moveAcceptedData);
+                        console.log(`📢 Broadcasted move to game room ${result.session.roomId}`);
+                    }
+                    // Update activity timestamp
+                    await (0, session_manager_1.updateSessionActivity)(data.userId);
+                }
+                else {
+                    // Send rejection only to the requesting socket
+                    socket.emit('move-rejected', {
+                        error: result.error,
+                        move: data.move,
+                        versionConflict: result.versionConflict,
+                    });
+                }
+            }
+            catch (error) {
+                console.error('Error processing move:', error);
+                socket.emit('move-rejected', {
+                    error: 'Server error processing move',
+                    move: data.move,
+                });
+            }
+        });
+        // Handle session exit
+        socket.on('exit-arcade-session', async ({ userId }) => {
+            console.log('🚪 User exiting arcade session:', userId);
+            try {
+                await (0, session_manager_1.deleteArcadeSession)(userId);
+                io.to(`arcade:${userId}`).emit('session-ended');
+            }
+            catch (error) {
+                console.error('Error ending session:', error);
+                socket.emit('session-error', { error: 'Failed to end session' });
+            }
+        });
+        // Keep-alive ping
+        socket.on('ping-session', async ({ userId }) => {
+            try {
+                await (0, session_manager_1.updateSessionActivity)(userId);
+                socket.emit('pong-session');
+            }
+            catch (error) {
+                console.error('Error updating activity:', error);
+            }
+        });
+        // Room: Join
+        socket.on('join-room', async ({ roomId, userId }) => {
+            console.log(`🏠 User ${userId} joining room ${roomId}`);
+            try {
+                // Join the socket room
+                socket.join(`room:${roomId}`);
+                // Mark member as online
+                await (0, room_membership_1.setMemberOnline)(roomId, userId, true);
+                // Get room data
+                const members = await (0, room_membership_1.getRoomMembers)(roomId);
+                const memberPlayers = await (0, player_manager_1.getRoomActivePlayers)(roomId);
+                // Convert memberPlayers Map to object for JSON serialization
+                const memberPlayersObj = {};
+                for (const [uid, players] of memberPlayers.entries()) {
+                    memberPlayersObj[uid] = players;
+                }
+                // Send current room state to the joining user
+                socket.emit('room-joined', {
+                    roomId,
+                    members,
+                    memberPlayers: memberPlayersObj,
+                });
+                // Notify all other members in the room
+                socket.to(`room:${roomId}`).emit('member-joined', {
+                    roomId,
+                    userId,
+                    members,
+                    memberPlayers: memberPlayersObj,
+                });
+                console.log(`✅ User ${userId} joined room ${roomId}`);
+            }
+            catch (error) {
+                console.error('Error joining room:', error);
+                socket.emit('room-error', { error: 'Failed to join room' });
+            }
+        });
+        // Room: Leave
+        socket.on('leave-room', async ({ roomId, userId }) => {
+            console.log(`🚪 User ${userId} leaving room ${roomId}`);
+            try {
+                // Leave the socket room
+                socket.leave(`room:${roomId}`);
+                // Mark member as offline
+                await (0, room_membership_1.setMemberOnline)(roomId, userId, false);
+                // Get updated members
+                const members = await (0, room_membership_1.getRoomMembers)(roomId);
+                const memberPlayers = await (0, player_manager_1.getRoomActivePlayers)(roomId);
+                // Convert memberPlayers Map to object
+                const memberPlayersObj = {};
+                for (const [uid, players] of memberPlayers.entries()) {
+                    memberPlayersObj[uid] = players;
+                }
+                // Notify remaining members
+                io.to(`room:${roomId}`).emit('member-left', {
+                    roomId,
+                    userId,
+                    members,
+                    memberPlayers: memberPlayersObj,
+                });
+                console.log(`✅ User ${userId} left room ${roomId}`);
+            }
+            catch (error) {
+                console.error('Error leaving room:', error);
+            }
+        });
+        // Room: Players updated
+        socket.on('players-updated', async ({ roomId, userId }) => {
+            console.log(`🎯 Players updated for user ${userId} in room ${roomId}`);
+            try {
+                // Get updated player data
+                const memberPlayers = await (0, player_manager_1.getRoomActivePlayers)(roomId);
+                // Convert memberPlayers Map to object
+                const memberPlayersObj = {};
+                for (const [uid, players] of memberPlayers.entries()) {
+                    memberPlayersObj[uid] = players;
+                }
+                // Broadcast to all members in the room (including sender)
+                io.to(`room:${roomId}`).emit('room-players-updated', {
+                    roomId,
+                    memberPlayers: memberPlayersObj,
+                });
+                console.log(`✅ Broadcasted player updates for room ${roomId}`);
+            }
+            catch (error) {
+                console.error('Error updating room players:', error);
+                socket.emit('room-error', { error: 'Failed to update players' });
+            }
+        });
+        socket.on('disconnect', () => {
+            console.log('🔌 Client disconnected:', socket.id);
+            if (currentUserId) {
+                // Don't delete session on disconnect - it persists across devices
+                console.log(`👤 User ${currentUserId} disconnected but session persists`);
+            }
+        });
+    });
+    // Store in globalThis to make accessible across module boundaries
+    globalThis.__socketIO = io;
+    console.log('✅ Socket.IO initialized on /api/socket');
+    return io;
+}

apps/web/socket-server.ts

@@ -0,0 +1,375 @@
+import type { Server as HTTPServer } from 'http'
+import { Server as SocketIOServer } from 'socket.io'
+import type { Server as SocketIOServerType } from 'socket.io'
+import {
+  applyGameMove,
+  createArcadeSession,
+  deleteArcadeSession,
+  getArcadeSession,
+  getArcadeSessionByRoom,
+  updateSessionActivity,
+} from './src/lib/arcade/session-manager'
+import { createRoom, getRoomById } from './src/lib/arcade/room-manager'
+import { getRoomMembers, getUserRooms, setMemberOnline } from './src/lib/arcade/room-membership'
+import { getRoomActivePlayers } from './src/lib/arcade/player-manager'
+import type { GameMove, GameName } from './src/lib/arcade/validation'
+import { matchingGameValidator } from './src/lib/arcade/validation/MatchingGameValidator'
+
+// Use globalThis to store socket.io instance to avoid module isolation issues
+// This ensures the same instance is accessible across dynamic imports
+declare global {
+  var __socketIO: SocketIOServerType | undefined
+}
+
+/**
+ * Get the socket.io server instance
+ * Returns null if not initialized
+ */
+export function getSocketIO(): SocketIOServerType | null {
+  return globalThis.__socketIO || null
+}
+
+export function initializeSocketServer(httpServer: HTTPServer) {
+  const io = new SocketIOServer(httpServer, {
+    path: '/api/socket',
+    cors: {
+      origin: process.env.NEXT_PUBLIC_URL || 'http://localhost:3000',
+      credentials: true,
+    },
+  })
+
+  io.on('connection', (socket) => {
+    console.log('🔌 Client connected:', socket.id)
+    let currentUserId: string | null = null
+
+    // Join arcade session room
+    socket.on(
+      'join-arcade-session',
+      async ({ userId, roomId }: { userId: string; roomId?: string }) => {
+        currentUserId = userId
+        socket.join(`arcade:${userId}`)
+        console.log(`👤 User ${userId} joined arcade room`)
+
+        // If this session is part of a room, also join the game room for multi-user sync
+        if (roomId) {
+          socket.join(`game:${roomId}`)
+          console.log(`🎮 User ${userId} joined game room ${roomId}`)
+        }
+
+        // Send current session state if exists
+        // For room-based games, look up shared room session
+        try {
+          const session = roomId
+            ? await getArcadeSessionByRoom(roomId)
+            : await getArcadeSession(userId)
+
+          if (session) {
+            console.log('[join-arcade-session] Found session:', {
+              userId,
+              roomId,
+              version: session.version,
+              sessionUserId: session.userId,
+            })
+            socket.emit('session-state', {
+              gameState: session.gameState,
+              currentGame: session.currentGame,
+              gameUrl: session.gameUrl,
+              activePlayers: session.activePlayers,
+              version: session.version,
+            })
+          } else {
+            console.log('[join-arcade-session] No active session found for:', {
+              userId,
+              roomId,
+            })
+            socket.emit('no-active-session')
+          }
+        } catch (error) {
+          console.error('Error fetching session:', error)
+          socket.emit('session-error', { error: 'Failed to fetch session' })
+        }
+      }
+    )
+
+    // Handle game moves
+    socket.on('game-move', async (data: { userId: string; move: GameMove; roomId?: string }) => {
+      console.log('🎮 Game move received:', {
+        userId: data.userId,
+        moveType: data.move.type,
+        playerId: data.move.playerId,
+        timestamp: data.move.timestamp,
+        roomId: data.roomId,
+        fullMove: JSON.stringify(data.move, null, 2),
+      })
+
+      try {
+        // Special handling for START_GAME - create session if it doesn't exist
+        if (data.move.type === 'START_GAME') {
+          // For room-based games, check if room session exists
+          const existingSession = data.roomId
+            ? await getArcadeSessionByRoom(data.roomId)
+            : await getArcadeSession(data.userId)
+
+          if (!existingSession) {
+            console.log('🎯 Creating new session for START_GAME')
+
+            // activePlayers must be provided in the START_GAME move data
+            const activePlayers = (data.move.data as any)?.activePlayers
+            if (!activePlayers || activePlayers.length === 0) {
+              console.error('❌ START_GAME move missing activePlayers')
+              socket.emit('move-rejected', {
+                error: 'START_GAME requires at least one active player',
+                move: data.move,
+              })
+              return
+            }
+
+            // Get initial state from validator
+            const initialState = matchingGameValidator.getInitialState({
+              difficulty: 6,
+              gameType: 'abacus-numeral',
+              turnTimer: 30,
+            })
+
+            // Check if user is already in a room for this game
+            const userRoomIds = await getUserRooms(data.userId)
+            let room = null
+
+            // Look for an existing active room for this game
+            for (const roomId of userRoomIds) {
+              const existingRoom = await getRoomById(roomId)
+              if (
+                existingRoom &&
+                existingRoom.gameName === 'matching' &&
+                existingRoom.status !== 'finished'
+              ) {
+                room = existingRoom
+                console.log('🏠 Using existing room:', room.code)
+                break
+              }
+            }
+
+            // If no suitable room exists, create a new one
+            if (!room) {
+              room = await createRoom({
+                name: 'Auto-generated Room',
+                createdBy: data.userId,
+                creatorName: 'Player',
+                gameName: 'matching' as GameName,
+                gameConfig: {
+                  difficulty: 6,
+                  gameType: 'abacus-numeral',
+                  turnTimer: 30,
+                },
+                ttlMinutes: 60,
+              })
+              console.log('🏠 Created new room:', room.code)
+            }
+
+            // Now create the session linked to the room
+            await createArcadeSession({
+              userId: data.userId,
+              gameName: 'matching',
+              gameUrl: '/arcade/room', // Room-based sessions use /arcade/room
+              initialState,
+              activePlayers,
+              roomId: room.id,
+            })
+
+            console.log('✅ Session created successfully with room association')
+
+            // Notify all connected clients about the new session
+            const newSession = await getArcadeSession(data.userId)
+            if (newSession) {
+              io!.to(`arcade:${data.userId}`).emit('session-state', {
+                gameState: newSession.gameState,
+                currentGame: newSession.currentGame,
+                gameUrl: newSession.gameUrl,
+                activePlayers: newSession.activePlayers,
+                version: newSession.version,
+              })
+              console.log('📢 Emitted session-state to notify clients of new session')
+            }
+          }
+        }
+
+        // Apply game move - use roomId for room-based games to access shared session
+        const result = await applyGameMove(data.userId, data.move, data.roomId)
+
+        if (result.success && result.session) {
+          const moveAcceptedData = {
+            gameState: result.session.gameState,
+            version: result.session.version,
+            move: data.move,
+          }
+
+          // Broadcast the updated state to all devices for this user
+          io!.to(`arcade:${data.userId}`).emit('move-accepted', moveAcceptedData)
+
+          // If this is a room-based session, ALSO broadcast to all users in the room
+          if (result.session.roomId) {
+            io!.to(`game:${result.session.roomId}`).emit('move-accepted', moveAcceptedData)
+            console.log(`📢 Broadcasted move to game room ${result.session.roomId}`)
+          }
+
+          // Update activity timestamp
+          await updateSessionActivity(data.userId)
+        } else {
+          // Send rejection only to the requesting socket
+          socket.emit('move-rejected', {
+            error: result.error,
+            move: data.move,
+            versionConflict: result.versionConflict,
+          })
+        }
+      } catch (error) {
+        console.error('Error processing move:', error)
+        socket.emit('move-rejected', {
+          error: 'Server error processing move',
+          move: data.move,
+        })
+      }
+    })
+
+    // Handle session exit
+    socket.on('exit-arcade-session', async ({ userId }: { userId: string }) => {
+      console.log('🚪 User exiting arcade session:', userId)
+
+      try {
+        await deleteArcadeSession(userId)
+        io!.to(`arcade:${userId}`).emit('session-ended')
+      } catch (error) {
+        console.error('Error ending session:', error)
+        socket.emit('session-error', { error: 'Failed to end session' })
+      }
+    })
+
+    // Keep-alive ping
+    socket.on('ping-session', async ({ userId }: { userId: string }) => {
+      try {
+        await updateSessionActivity(userId)
+        socket.emit('pong-session')
+      } catch (error) {
+        console.error('Error updating activity:', error)
+      }
+    })
+
+    // Room: Join
+    socket.on('join-room', async ({ roomId, userId }: { roomId: string; userId: string }) => {
+      console.log(`🏠 User ${userId} joining room ${roomId}`)
+
+      try {
+        // Join the socket room
+        socket.join(`room:${roomId}`)
+
+        // Mark member as online
+        await setMemberOnline(roomId, userId, true)
+
+        // Get room data
+        const members = await getRoomMembers(roomId)
+        const memberPlayers = await getRoomActivePlayers(roomId)
+
+        // Convert memberPlayers Map to object for JSON serialization
+        const memberPlayersObj: Record<string, any[]> = {}
+        for (const [uid, players] of memberPlayers.entries()) {
+          memberPlayersObj[uid] = players
+        }
+
+        // Send current room state to the joining user
+        socket.emit('room-joined', {
+          roomId,
+          members,
+          memberPlayers: memberPlayersObj,
+        })
+
+        // Notify all other members in the room
+        socket.to(`room:${roomId}`).emit('member-joined', {
+          roomId,
+          userId,
+          members,
+          memberPlayers: memberPlayersObj,
+        })
+
+        console.log(`✅ User ${userId} joined room ${roomId}`)
+      } catch (error) {
+        console.error('Error joining room:', error)
+        socket.emit('room-error', { error: 'Failed to join room' })
+      }
+    })
+
+    // Room: Leave
+    socket.on('leave-room', async ({ roomId, userId }: { roomId: string; userId: string }) => {
+      console.log(`🚪 User ${userId} leaving room ${roomId}`)
+
+      try {
+        // Leave the socket room
+        socket.leave(`room:${roomId}`)
+
+        // Mark member as offline
+        await setMemberOnline(roomId, userId, false)
+
+        // Get updated members
+        const members = await getRoomMembers(roomId)
+        const memberPlayers = await getRoomActivePlayers(roomId)
+
+        // Convert memberPlayers Map to object
+        const memberPlayersObj: Record<string, any[]> = {}
+        for (const [uid, players] of memberPlayers.entries()) {
+          memberPlayersObj[uid] = players
+        }
+
+        // Notify remaining members
+        io!.to(`room:${roomId}`).emit('member-left', {
+          roomId,
+          userId,
+          members,
+          memberPlayers: memberPlayersObj,
+        })
+
+        console.log(`✅ User ${userId} left room ${roomId}`)
+      } catch (error) {
+        console.error('Error leaving room:', error)
+      }
+    })
+
+    // Room: Players updated
+    socket.on('players-updated', async ({ roomId, userId }: { roomId: string; userId: string }) => {
+      console.log(`🎯 Players updated for user ${userId} in room ${roomId}`)
+
+      try {
+        // Get updated player data
+        const memberPlayers = await getRoomActivePlayers(roomId)
+
+        // Convert memberPlayers Map to object
+        const memberPlayersObj: Record<string, any[]> = {}
+        for (const [uid, players] of memberPlayers.entries()) {
+          memberPlayersObj[uid] = players
+        }
+
+        // Broadcast to all members in the room (including sender)
+        io!.to(`room:${roomId}`).emit('room-players-updated', {
+          roomId,
+          memberPlayers: memberPlayersObj,
+        })
+
+        console.log(`✅ Broadcasted player updates for room ${roomId}`)
+      } catch (error) {
+        console.error('Error updating room players:', error)
+        socket.emit('room-error', { error: 'Failed to update players' })
+      }
+    })
+
+    socket.on('disconnect', () => {
+      console.log('🔌 Client disconnected:', socket.id)
+      if (currentUserId) {
+        // Don't delete session on disconnect - it persists across devices
+        console.log(`👤 User ${currentUserId} disconnected but session persists`)
+      }
+    })
+  })
+
+  // Store in globalThis to make accessible across module boundaries
+  globalThis.__socketIO = io
+  console.log('✅ Socket.IO initialized on /api/socket')
+  return io
+}

apps/web/src/app/__tests__/layout.nav.test.tsx

@@ -1,62 +1,33 @@
 import { render, screen } from '@testing-library/react'
 import RootLayout from '../layout'
 
-// Mock AppNavBar to verify it receives the nav prop
-const MockAppNavBar = ({ navSlot }: { navSlot?: React.ReactNode }) => (
-  <div data-testid="app-nav-bar">
-    {navSlot && <div data-testid="nav-slot-content">{navSlot}</div>}
-  </div>
-)
-
-jest.mock('../../components/AppNavBar', () => ({
-  AppNavBar: MockAppNavBar,
+// Mock ClientProviders
+vi.mock('../../components/ClientProviders', () => ({
+  ClientProviders: ({ children }: { children: React.ReactNode }) => (
+    <div data-testid="client-providers">{children}</div>
+  ),
 }))
 
-// Mock all context providers
-jest.mock('../../contexts/AbacusDisplayContext', () => ({
-  AbacusDisplayProvider: ({ children }: { children: React.ReactNode }) => <div>{children}</div>,
-}))
-
-jest.mock('../../contexts/UserProfileContext', () => ({
-  UserProfileProvider: ({ children }: { children: React.ReactNode }) => <div>{children}</div>,
-}))
-
-jest.mock('../../contexts/GameModeContext', () => ({
-  GameModeProvider: ({ children }: { children: React.ReactNode }) => <div>{children}</div>,
-}))
-
-jest.mock('../../contexts/FullscreenContext', () => ({
-  FullscreenProvider: ({ children }: { children: React.ReactNode }) => <div>{children}</div>,
-}))
-
-describe('RootLayout with nav slot', () => {
-  it('passes nav slot to AppNavBar', () => {
-    const navContent = <div>Memory Lightning</div>
+describe('RootLayout', () => {
+  it('renders children with ClientProviders', () => {
     const pageContent = <div>Page content</div>
 
-    render(
-      <RootLayout nav={navContent}>
-        {pageContent}
-      </RootLayout>
-    )
+    render(<RootLayout>{pageContent}</RootLayout>)
 
-    expect(screen.getByTestId('app-nav-bar')).toBeInTheDocument()
-    expect(screen.getByTestId('nav-slot-content')).toBeInTheDocument()
-    expect(screen.getByText('Memory Lightning')).toBeInTheDocument()
+    expect(screen.getByTestId('client-providers')).toBeInTheDocument()
     expect(screen.getByText('Page content')).toBeInTheDocument()
   })
 
-  it('works without nav slot', () => {
-    const pageContent = <div>Page content</div>
+  it('renders html and body tags', () => {
+    const pageContent = <div>Test content</div>
 
-    render(
-      <RootLayout nav={null}>
-        {pageContent}
-      </RootLayout>
-    )
+    const { container } = render(<RootLayout>{pageContent}</RootLayout>)
 
-    expect(screen.getByTestId('app-nav-bar')).toBeInTheDocument()
-    expect(screen.queryByTestId('nav-slot-content')).not.toBeInTheDocument()
-    expect(screen.getByText('Page content')).toBeInTheDocument()
+    const html = container.querySelector('html')
+    const body = container.querySelector('body')
+
+    expect(html).toBeInTheDocument()
+    expect(html).toHaveAttribute('lang', 'en')
+    expect(body).toBeInTheDocument()
   })
-})
+})

apps/web/src/app/abacus-test/page.tsx

@@ -1,8 +1,8 @@
 'use client'
 
 import { AbacusReact } from '@soroban/abacus-react'
-import { css } from '../../../styled-system/css'
 import { useState } from 'react'
+import { css } from '../../../styled-system/css'
 
 export default function AbacusTestPage() {
   const [value, setValue] = useState(0)
@@ -15,32 +15,36 @@ export default function AbacusTestPage() {
   }
 
   return (
-    <div className={css({
-      position: 'fixed',
-      top: 0,
-      left: 0,
-      right: 0,
-      bottom: 0,
-      bg: 'gray.50',
-      display: 'flex',
-      flexDirection: 'column',
-      alignItems: 'center',
-      justifyContent: 'center',
-      padding: '4'
-    })}>
+    <div
+      className={css({
+        position: 'fixed',
+        top: 0,
+        left: 0,
+        right: 0,
+        bottom: 0,
+        bg: 'gray.50',
+        display: 'flex',
+        flexDirection: 'column',
+        alignItems: 'center',
+        justifyContent: 'center',
+        padding: '4',
+      })}
+    >
       {/* Debug info */}
-      <div className={css({
-        position: 'absolute',
-        top: '4',
-        left: '4',
-        bg: 'white',
-        p: '3',
-        rounded: 'md',
-        border: '1px solid',
-        borderColor: 'gray.300',
-        fontSize: 'sm',
-        fontFamily: 'mono'
-      })}>
+      <div
+        className={css({
+          position: 'absolute',
+          top: '4',
+          left: '4',
+          bg: 'white',
+          p: '3',
+          rounded: 'md',
+          border: '1px solid',
+          borderColor: 'gray.300',
+          fontSize: 'sm',
+          fontFamily: 'mono',
+        })}
+      >
         <div>Current Value: {value}</div>
         <div>{debugInfo}</div>
         <button
@@ -53,7 +57,7 @@ export default function AbacusTestPage() {
             color: 'white',
             rounded: 'sm',
             fontSize: 'xs',
-            cursor: 'pointer'
+            cursor: 'pointer',
           })}
         >
           Reset to 0
@@ -68,20 +72,22 @@ export default function AbacusTestPage() {
             color: 'white',
             rounded: 'sm',
             fontSize: 'xs',
-            cursor: 'pointer'
+            cursor: 'pointer',
           })}
         >
           Set to 12345
         </button>
       </div>
 
-      <div style={{
-        width: '100%',
-        height: '100%',
-        display: 'flex',
-        alignItems: 'center',
-        justifyContent: 'center'
-      }}>
+      <div
+        style={{
+          width: '100%',
+          height: '100%',
+          display: 'flex',
+          alignItems: 'center',
+          justifyContent: 'center',
+        }}
+      >
         <AbacusReact
           value={value}
           columns={5}
@@ -97,4 +103,4 @@ export default function AbacusTestPage() {
       </div>
     </div>
   )
-}
+}

apps/web/src/app/api/abacus-settings/route.ts

@@ -0,0 +1,101 @@
+import { eq } from 'drizzle-orm'
+import { type NextRequest, NextResponse } from 'next/server'
+import { db } from '@/db'
+import * as schema from '@/db/schema'
+import { getViewerId } from '@/lib/viewer'
+
+/**
+ * GET /api/abacus-settings
+ * Fetch abacus display settings for the current user
+ */
+export async function GET() {
+  try {
+    const viewerId = await getViewerId()
+    const user = await getOrCreateUser(viewerId)
+
+    // Find or create abacus settings
+    let settings = await db.query.abacusSettings.findFirst({
+      where: eq(schema.abacusSettings.userId, user.id),
+    })
+
+    // If no settings exist, create with defaults
+    if (!settings) {
+      const [newSettings] = await db
+        .insert(schema.abacusSettings)
+        .values({ userId: user.id })
+        .returning()
+      settings = newSettings
+    }
+
+    return NextResponse.json({ settings })
+  } catch (error) {
+    console.error('Failed to fetch abacus settings:', error)
+    return NextResponse.json({ error: 'Failed to fetch abacus settings' }, { status: 500 })
+  }
+}
+
+/**
+ * PATCH /api/abacus-settings
+ * Update abacus display settings for the current user
+ */
+export async function PATCH(req: NextRequest) {
+  try {
+    const viewerId = await getViewerId()
+    const body = await req.json()
+
+    // Security: Strip userId from request body - it must come from session only
+    const { userId: _, ...updates } = body
+
+    const user = await getOrCreateUser(viewerId)
+
+    // Ensure settings exist
+    const existingSettings = await db.query.abacusSettings.findFirst({
+      where: eq(schema.abacusSettings.userId, user.id),
+    })
+
+    if (!existingSettings) {
+      // Create new settings with updates
+      const [newSettings] = await db
+        .insert(schema.abacusSettings)
+        .values({ userId: user.id, ...updates })
+        .returning()
+      return NextResponse.json({ settings: newSettings })
+    }
+
+    // Update existing settings
+    const [updatedSettings] = await db
+      .update(schema.abacusSettings)
+      .set(updates)
+      .where(eq(schema.abacusSettings.userId, user.id))
+      .returning()
+
+    return NextResponse.json({ settings: updatedSettings })
+  } catch (error) {
+    console.error('Failed to update abacus settings:', error)
+    return NextResponse.json({ error: 'Failed to update abacus settings' }, { status: 500 })
+  }
+}
+
+/**
+ * Get or create a user record for the given viewer ID (guest or user)
+ */
+async function getOrCreateUser(viewerId: string) {
+  // Try to find existing user by guest ID
+  let user = await db.query.users.findFirst({
+    where: eq(schema.users.guestId, viewerId),
+  })
+
+  // If no user exists, create one
+  if (!user) {
+    const [newUser] = await db
+      .insert(schema.users)
+      .values({
+        guestId: viewerId,
+      })
+      .returning()
+
+    user = newUser
+  }
+
+  return user
+}

apps/web/src/app/api/arcade-session/__tests__/route.test.ts

@@ -0,0 +1,176 @@
+import { eq } from 'drizzle-orm'
+import { NextRequest } from 'next/server'
+import { afterEach, beforeEach, describe, expect, it } from 'vitest'
+import { db, schema } from '@/db'
+import { deleteArcadeSession } from '@/lib/arcade/session-manager'
+import { DELETE, GET, POST } from '../route'
+
+describe('Arcade Session API Routes', () => {
+  const testUserId = 'test-user-for-api-routes'
+  const testGuestId = 'test-guest-id-api-routes'
+  const baseUrl = 'http://localhost:3000'
+
+  beforeEach(async () => {
+    // Create test user
+    await db
+      .insert(schema.users)
+      .values({
+        id: testUserId,
+        guestId: testGuestId,
+        createdAt: new Date(),
+      })
+      .onConflictDoNothing()
+  })
+
+  afterEach(async () => {
+    // Clean up
+    await deleteArcadeSession(testUserId)
+    await db.delete(schema.users).where(eq(schema.users.id, testUserId))
+  })
+
+  describe('POST /api/arcade-session', () => {
+    it('should create a new session', async () => {
+      const request = new NextRequest(`${baseUrl}/api/arcade-session`, {
+        method: 'POST',
+        body: JSON.stringify({
+          userId: testUserId,
+          gameName: 'matching',
+          gameUrl: '/arcade/matching',
+          initialState: { test: 'state' },
+          activePlayers: [1],
+        }),
+      })
+
+      const response = await POST(request)
+      const data = await response.json()
+
+      expect(response.status).toBe(200)
+      expect(data.session).toBeDefined()
+      expect(data.session.currentGame).toBe('matching')
+      expect(data.session.version).toBe(1)
+    })
+
+    it('should return 400 for missing fields', async () => {
+      const request = new NextRequest(`${baseUrl}/api/arcade-session`, {
+        method: 'POST',
+        body: JSON.stringify({
+          userId: testUserId,
+          // Missing required fields
+        }),
+      })
+
+      const response = await POST(request)
+      const data = await response.json()
+
+      expect(response.status).toBe(400)
+      expect(data.error).toBe('Missing required fields')
+    })
+
+    it('should return 500 for non-existent user (foreign key constraint)', async () => {
+      const request = new NextRequest(`${baseUrl}/api/arcade-session`, {
+        method: 'POST',
+        body: JSON.stringify({
+          userId: 'non-existent-user',
+          gameName: 'matching',
+          gameUrl: '/arcade/matching',
+          initialState: {},
+          activePlayers: [1],
+        }),
+      })
+
+      const response = await POST(request)
+
+      expect(response.status).toBe(500)
+    })
+  })
+
+  describe('GET /api/arcade-session', () => {
+    it('should retrieve an existing session', async () => {
+      // Create session first
+      const createRequest = new NextRequest(`${baseUrl}/api/arcade-session`, {
+        method: 'POST',
+        body: JSON.stringify({
+          userId: testUserId,
+          gameName: 'matching',
+          gameUrl: '/arcade/matching',
+          initialState: { test: 'state' },
+          activePlayers: [1],
+        }),
+      })
+      await POST(createRequest)
+
+      // Now retrieve it
+      const request = new NextRequest(`${baseUrl}/api/arcade-session?userId=${testUserId}`)
+
+      const response = await GET(request)
+      const data = await response.json()
+
+      expect(response.status).toBe(200)
+      expect(data.session).toBeDefined()
+      expect(data.session.currentGame).toBe('matching')
+    })
+
+    it('should return 404 for non-existent session', async () => {
+      const request = new NextRequest(`${baseUrl}/api/arcade-session?userId=non-existent`)
+
+      const response = await GET(request)
+
+      expect(response.status).toBe(404)
+    })
+
+    it('should return 400 for missing userId', async () => {
+      const request = new NextRequest(`${baseUrl}/api/arcade-session`)
+
+      const response = await GET(request)
+      const data = await response.json()
+
+      expect(response.status).toBe(400)
+      expect(data.error).toBe('userId required')
+    })
+  })
+
+  describe('DELETE /api/arcade-session', () => {
+    it('should delete an existing session', async () => {
+      // Create session first
+      const createRequest = new NextRequest(`${baseUrl}/api/arcade-session`, {
+        method: 'POST',
+        body: JSON.stringify({
+          userId: testUserId,
+          gameName: 'matching',
+          gameUrl: '/arcade/matching',
+          initialState: {},
+          activePlayers: [1],
+        }),
+      })
+      await POST(createRequest)
+
+      // Now delete it
+      const request = new NextRequest(`${baseUrl}/api/arcade-session?userId=${testUserId}`, {
+        method: 'DELETE',
+      })
+
+      const response = await DELETE(request)
+      const data = await response.json()
+
+      expect(response.status).toBe(200)
+      expect(data.success).toBe(true)
+
+      // Verify it's deleted
+      const getRequest = new NextRequest(`${baseUrl}/api/arcade-session?userId=${testUserId}`)
+      const getResponse = await GET(getRequest)
+      expect(getResponse.status).toBe(404)
+    })
+
+    it('should return 400 for missing userId', async () => {
+      const request = new NextRequest(`${baseUrl}/api/arcade-session`, {
+        method: 'DELETE',
+      })
+
+      const response = await DELETE(request)
+      const data = await response.json()
+
+      expect(response.status).toBe(400)
+      expect(data.error).toBe('userId required')
+    })
+  })
+})

apps/web/src/app/api/arcade-session/route.ts

@@ -0,0 +1,106 @@
+import { type NextRequest, NextResponse } from 'next/server'
+import {
+  createArcadeSession,
+  deleteArcadeSession,
+  getArcadeSession,
+} from '@/lib/arcade/session-manager'
+import type { GameName } from '@/lib/arcade/validation'
+
+/**
+ * GET /api/arcade-session?userId=xxx
+ * Get the active arcade session for a user
+ */
+export async function GET(request: NextRequest) {
+  try {
+    const userId = request.nextUrl.searchParams.get('userId')
+
+    if (!userId) {
+      return NextResponse.json({ error: 'userId required' }, { status: 400 })
+    }
+
+    const session = await getArcadeSession(userId)
+
+    if (!session) {
+      return NextResponse.json({ error: 'No active session' }, { status: 404 })
+    }
+
+    return NextResponse.json({
+      session: {
+        currentGame: session.currentGame,
+        gameUrl: session.gameUrl,
+        gameState: session.gameState,
+        activePlayers: session.activePlayers,
+        version: session.version,
+        expiresAt: session.expiresAt,
+      },
+    })
+  } catch (error) {
+    console.error('Error fetching arcade session:', error)
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 })
+  }
+}
+
+/**
+ * POST /api/arcade-session
+ * Create a new arcade session
+ */
+export async function POST(request: NextRequest) {
+  try {
+    const body = await request.json()
+    const { userId, gameName, gameUrl, initialState, activePlayers, roomId } = body
+
+    if (!userId || !gameName || !gameUrl || !initialState || !activePlayers || !roomId) {
+      return NextResponse.json(
+        {
+          error:
+            'Missing required fields (userId, gameName, gameUrl, initialState, activePlayers, roomId)',
+        },
+        { status: 400 }
+      )
+    }
+
+    const session = await createArcadeSession({
+      userId,
+      gameName: gameName as GameName,
+      gameUrl,
+      initialState,
+      activePlayers,
+      roomId,
+    })
+
+    return NextResponse.json({
+      session: {
+        currentGame: session.currentGame,
+        gameUrl: session.gameUrl,
+        gameState: session.gameState,
+        activePlayers: session.activePlayers,
+        version: session.version,
+        expiresAt: session.expiresAt,
+      },
+    })
+  } catch (error) {
+    console.error('Error creating arcade session:', error)
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 })
+  }
+}
+
+/**
+ * DELETE /api/arcade-session?userId=xxx
+ * Delete an arcade session
+ */
+export async function DELETE(request: NextRequest) {
+  try {
+    const userId = request.nextUrl.searchParams.get('userId')
+
+    if (!userId) {
+      return NextResponse.json({ error: 'userId required' }, { status: 400 })
+    }
+
+    await deleteArcadeSession(userId)
+
+    return NextResponse.json({ success: true })
+  } catch (error) {
+    console.error('Error deleting arcade session:', error)
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 })
+  }
+}

apps/web/src/app/api/arcade-session/types.ts

@@ -0,0 +1,18 @@
+/**
+ * API response types for /api/arcade-session
+ */
+
+export interface ArcadeSessionResponse {
+  session: {
+    currentGame: string
+    gameUrl: string
+    gameState: unknown
+    activePlayers: number[]
+    version: number
+    expiresAt: Date | string
+  }
+}
+
+export interface ArcadeSessionErrorResponse {
+  error: string
+}

apps/web/src/app/api/arcade/rooms/[roomId]/join/route.ts

@@ -0,0 +1,125 @@
+import { type NextRequest, NextResponse } from 'next/server'
+import { getRoomById, touchRoom } from '@/lib/arcade/room-manager'
+import { addRoomMember, getRoomMembers } from '@/lib/arcade/room-membership'
+import { getActivePlayers, getRoomActivePlayers } from '@/lib/arcade/player-manager'
+import { getViewerId } from '@/lib/viewer'
+import { getSocketIO } from '@/lib/socket-io'
+
+type RouteContext = {
+  params: Promise<{ roomId: string }>
+}
+
+/**
+ * POST /api/arcade/rooms/:roomId/join
+ * Join a room
+ * Body:
+ *   - displayName?: string (optional, will generate from viewerId if not provided)
+ */
+export async function POST(req: NextRequest, context: RouteContext) {
+  try {
+    const { roomId } = await context.params
+    const viewerId = await getViewerId()
+    const body = await req.json().catch(() => ({}))
+
+    // Get room
+    const room = await getRoomById(roomId)
+    if (!room) {
+      return NextResponse.json({ error: 'Room not found' }, { status: 404 })
+    }
+
+    // Check if room is locked
+    if (room.isLocked) {
+      return NextResponse.json({ error: 'Room is locked' }, { status: 403 })
+    }
+
+    // Get or generate display name
+    const displayName = body.displayName || `Guest ${viewerId.slice(-4)}`
+
+    // Validate display name length
+    if (displayName.length > 50) {
+      return NextResponse.json(
+        { error: 'Display name too long (max 50 characters)' },
+        { status: 400 }
+      )
+    }
+
+    // Add member (with auto-leave logic for modal room enforcement)
+    const { member, autoLeaveResult } = await addRoomMember({
+      roomId,
+      userId: viewerId,
+      displayName,
+      isCreator: false,
+    })
+
+    // Fetch user's active players (these will participate in the game)
+    const activePlayers = await getActivePlayers(viewerId)
+
+    // Update room activity to refresh TTL
+    await touchRoom(roomId)
+
+    // Broadcast to all users in the room via socket
+    const io = await getSocketIO()
+    if (io) {
+      try {
+        const members = await getRoomMembers(roomId)
+        const memberPlayers = await getRoomActivePlayers(roomId)
+
+        // Convert memberPlayers Map to object for JSON serialization
+        const memberPlayersObj: Record<string, any[]> = {}
+        for (const [uid, players] of memberPlayers.entries()) {
+          memberPlayersObj[uid] = players
+        }
+
+        // Broadcast to all users in this room
+        io.to(`room:${roomId}`).emit('member-joined', {
+          roomId,
+          userId: viewerId,
+          members,
+          memberPlayers: memberPlayersObj,
+        })
+
+        console.log(`[Join API] Broadcasted member-joined for user ${viewerId} in room ${roomId}`)
+      } catch (socketError) {
+        // Log but don't fail the request if socket broadcast fails
+        console.error('[Join API] Failed to broadcast member-joined:', socketError)
+      }
+    }
+
+    // Build response with auto-leave info if applicable
+    return NextResponse.json(
+      {
+        member,
+        room,
+        activePlayers, // The user's active players that will join the game
+        autoLeave: autoLeaveResult
+          ? {
+              leftRooms: autoLeaveResult.leftRooms,
+              roomCount: autoLeaveResult.leftRooms.length,
+              message: `You were automatically removed from ${autoLeaveResult.leftRooms.length} other room(s)`,
+            }
+          : undefined,
+      },
+      { status: 201 }
+    )
+  } catch (error: any) {
+    console.error('Failed to join room:', error)
+
+    // Handle specific constraint violation error
+    if (error.message?.includes('ROOM_MEMBERSHIP_CONFLICT')) {
+      return NextResponse.json(
+        {
+          error: 'You are already in another room',
+          code: 'ROOM_MEMBERSHIP_CONFLICT',
+          message:
+            'You can only be in one room at a time. Please leave your current room before joining a new one.',
+          userMessage:
+            '⚠️ Already in Another Room\n\nYou can only be in one room at a time. Please refresh the page and try again.',
+        },
+        { status: 409 } // 409 Conflict
+      )
+    }
+
+    // Generic error
+    return NextResponse.json({ error: 'Failed to join room' }, { status: 500 })
+  }
+}

apps/web/src/app/api/arcade/rooms/[roomId]/leave/route.ts

@@ -0,0 +1,69 @@
+import { type NextRequest, NextResponse } from 'next/server'
+import { getRoomById } from '@/lib/arcade/room-manager'
+import { getRoomMembers, isMember, removeMember } from '@/lib/arcade/room-membership'
+import { getRoomActivePlayers } from '@/lib/arcade/player-manager'
+import { getViewerId } from '@/lib/viewer'
+import { getSocketIO } from '@/lib/socket-io'
+
+type RouteContext = {
+  params: Promise<{ roomId: string }>
+}
+
+/**
+ * POST /api/arcade/rooms/:roomId/leave
+ * Leave a room
+ */
+export async function POST(_req: NextRequest, context: RouteContext) {
+  try {
+    const { roomId } = await context.params
+    const viewerId = await getViewerId()
+
+    // Get room
+    const room = await getRoomById(roomId)
+    if (!room) {
+      return NextResponse.json({ error: 'Room not found' }, { status: 404 })
+    }
+
+    // Check if member
+    const isMemberOfRoom = await isMember(roomId, viewerId)
+    if (!isMemberOfRoom) {
+      return NextResponse.json({ error: 'Not a member of this room' }, { status: 400 })
+    }
+
+    // Remove member
+    await removeMember(roomId, viewerId)
+
+    // Broadcast to all remaining users in the room via socket
+    const io = await getSocketIO()
+    if (io) {
+      try {
+        const members = await getRoomMembers(roomId)
+        const memberPlayers = await getRoomActivePlayers(roomId)
+
+        // Convert memberPlayers Map to object for JSON serialization
+        const memberPlayersObj: Record<string, any[]> = {}
+        for (const [uid, players] of memberPlayers.entries()) {
+          memberPlayersObj[uid] = players
+        }
+
+        // Broadcast to all users in this room
+        io.to(`room:${roomId}`).emit('member-left', {
+          roomId,
+          userId: viewerId,
+          members,
+          memberPlayers: memberPlayersObj,
+        })
+
+        console.log(`[Leave API] Broadcasted member-left for user ${viewerId} in room ${roomId}`)
+      } catch (socketError) {
+        // Log but don't fail the request if socket broadcast fails
+        console.error('[Leave API] Failed to broadcast member-left:', socketError)
+      }
+    }
+
+    return NextResponse.json({ success: true })
+  } catch (error) {
+    console.error('Failed to leave room:', error)
+    return NextResponse.json({ error: 'Failed to leave room' }, { status: 500 })
+  }
+}

apps/web/src/app/api/arcade/rooms/[roomId]/members/[userId]/route.ts

@@ -0,0 +1,50 @@
+import { type NextRequest, NextResponse } from 'next/server'
+import { getRoomById, isRoomCreator } from '@/lib/arcade/room-manager'
+import { isMember, removeMember } from '@/lib/arcade/room-membership'
+import { getViewerId } from '@/lib/viewer'
+
+type RouteContext = {
+  params: Promise<{ roomId: string; userId: string }>
+}
+
+/**
+ * DELETE /api/arcade/rooms/:roomId/members/:userId
+ * Kick a member from room (creator only)
+ */
+export async function DELETE(_req: NextRequest, context: RouteContext) {
+  try {
+    const { roomId, userId } = await context.params
+    const viewerId = await getViewerId()
+
+    // Get room
+    const room = await getRoomById(roomId)
+    if (!room) {
+      return NextResponse.json({ error: 'Room not found' }, { status: 404 })
+    }
+
+    // Check if requester is room creator
+    const isCreator = await isRoomCreator(roomId, viewerId)
+    if (!isCreator) {
+      return NextResponse.json({ error: 'Only room creator can kick members' }, { status: 403 })
+    }
+
+    // Cannot kick self
+    if (userId === viewerId) {
+      return NextResponse.json({ error: 'Cannot kick yourself' }, { status: 400 })
+    }
+
+    // Check if target user is a member
+    const isTargetMember = await isMember(roomId, userId)
+    if (!isTargetMember) {
+      return NextResponse.json({ error: 'User is not a member of this room' }, { status: 404 })
+    }
+
+    // Remove member
+    await removeMember(roomId, userId)
+
+    return NextResponse.json({ success: true })
+  } catch (error) {
+    console.error('Failed to kick member:', error)
+    return NextResponse.json({ error: 'Failed to kick member' }, { status: 500 })
+  }
+}

apps/web/src/app/api/arcade/rooms/[roomId]/members/route.ts

@@ -0,0 +1,35 @@
+import { type NextRequest, NextResponse } from 'next/server'
+import { getRoomById } from '@/lib/arcade/room-manager'
+import { getOnlineMemberCount, getRoomMembers } from '@/lib/arcade/room-membership'
+
+type RouteContext = {
+  params: Promise<{ roomId: string }>
+}
+
+/**
+ * GET /api/arcade/rooms/:roomId/members
+ * Get all members in a room
+ */
+export async function GET(_req: NextRequest, context: RouteContext) {
+  try {
+    const { roomId } = await context.params
+
+    // Get room
+    const room = await getRoomById(roomId)
+    if (!room) {
+      return NextResponse.json({ error: 'Room not found' }, { status: 404 })
+    }
+
+    // Get members
+    const members = await getRoomMembers(roomId)
+    const onlineCount = await getOnlineMemberCount(roomId)
+
+    return NextResponse.json({
+      members,
+      onlineCount,
+    })
+  } catch (error) {
+    console.error('Failed to fetch members:', error)
+    return NextResponse.json({ error: 'Failed to fetch members' }, { status: 500 })
+  }
+}

apps/web/src/app/api/arcade/rooms/[roomId]/route.ts

@@ -0,0 +1,132 @@
+import { type NextRequest, NextResponse } from 'next/server'
+import {
+  deleteRoom,
+  getRoomById,
+  isRoomCreator,
+  touchRoom,
+  updateRoom,
+} from '@/lib/arcade/room-manager'
+import { getRoomMembers } from '@/lib/arcade/room-membership'
+import { getActivePlayers } from '@/lib/arcade/player-manager'
+import { getViewerId } from '@/lib/viewer'
+
+type RouteContext = {
+  params: Promise<{ roomId: string }>
+}
+
+/**
+ * GET /api/arcade/rooms/:roomId
+ * Get room details including members
+ */
+export async function GET(_req: NextRequest, context: RouteContext) {
+  try {
+    const { roomId } = await context.params
+    const viewerId = await getViewerId()
+
+    const room = await getRoomById(roomId)
+    if (!room) {
+      return NextResponse.json({ error: 'Room not found' }, { status: 404 })
+    }
+
+    const members = await getRoomMembers(roomId)
+    const canModerate = await isRoomCreator(roomId, viewerId)
+
+    // Fetch active players for each member
+    // This creates a map of userId -> Player[]
+    const memberPlayers: Record<string, any[]> = {}
+    for (const member of members) {
+      const activePlayers = await getActivePlayers(member.userId)
+      memberPlayers[member.userId] = activePlayers
+    }
+
+    // Update room activity when viewing (keeps active rooms fresh)
+    await touchRoom(roomId)
+
+    return NextResponse.json({
+      room,
+      members,
+      memberPlayers, // Map of userId -> active Player[] for each member
+      canModerate,
+    })
+  } catch (error) {
+    console.error('Failed to fetch room:', error)
+    return NextResponse.json({ error: 'Failed to fetch room' }, { status: 500 })
+  }
+}
+
+/**
+ * PATCH /api/arcade/rooms/:roomId
+ * Update room (creator only)
+ * Body:
+ *   - name?: string
+ *   - isLocked?: boolean
+ *   - status?: 'lobby' | 'playing' | 'finished'
+ */
+export async function PATCH(req: NextRequest, context: RouteContext) {
+  try {
+    const { roomId } = await context.params
+    const viewerId = await getViewerId()
+    const body = await req.json()
+
+    // Check if user is room creator
+    const isCreator = await isRoomCreator(roomId, viewerId)
+    if (!isCreator) {
+      return NextResponse.json({ error: 'Only room creator can update room' }, { status: 403 })
+    }
+
+    // Validate name length if provided
+    if (body.name && body.name.length > 50) {
+      return NextResponse.json({ error: 'Room name too long (max 50 characters)' }, { status: 400 })
+    }
+
+    // Validate status if provided
+    if (body.status && !['lobby', 'playing', 'finished'].includes(body.status)) {
+      return NextResponse.json({ error: 'Invalid status' }, { status: 400 })
+    }
+
+    const updates: {
+      name?: string
+      isLocked?: boolean
+      status?: 'lobby' | 'playing' | 'finished'
+    } = {}
+
+    if (body.name !== undefined) updates.name = body.name
+    if (body.isLocked !== undefined) updates.isLocked = body.isLocked
+    if (body.status !== undefined) updates.status = body.status
+
+    const room = await updateRoom(roomId, updates)
+
+    if (!room) {
+      return NextResponse.json({ error: 'Room not found' }, { status: 404 })
+    }
+
+    return NextResponse.json({ room })
+  } catch (error) {
+    console.error('Failed to update room:', error)
+    return NextResponse.json({ error: 'Failed to update room' }, { status: 500 })
+  }
+}
+
+/**
+ * DELETE /api/arcade/rooms/:roomId
+ * Delete room (creator only)
+ */
+export async function DELETE(_req: NextRequest, context: RouteContext) {
+  try {
+    const { roomId } = await context.params
+    const viewerId = await getViewerId()
+
+    // Check if user is room creator
+    const isCreator = await isRoomCreator(roomId, viewerId)
+    if (!isCreator) {
+      return NextResponse.json({ error: 'Only room creator can delete room' }, { status: 403 })
+    }
+
+    await deleteRoom(roomId)
+
+    return NextResponse.json({ success: true })
+  } catch (error) {
+    console.error('Failed to delete room:', error)
+    return NextResponse.json({ error: 'Failed to delete room' }, { status: 500 })
+  }
+}

apps/web/src/app/api/arcade/rooms/code/[code]/route.ts

@@ -0,0 +1,39 @@
+import { type NextRequest, NextResponse } from 'next/server'
+import { getRoomByCode } from '@/lib/arcade/room-manager'
+import { normalizeRoomCode } from '@/lib/arcade/room-code'
+
+type RouteContext = {
+  params: Promise<{ code: string }>
+}
+
+/**
+ * GET /api/arcade/rooms/code/:code
+ * Get room by join code (for resolving codes to room IDs)
+ */
+export async function GET(_req: NextRequest, context: RouteContext) {
+  try {
+    const { code } = await context.params
+
+    // Normalize the code (uppercase, remove spaces/dashes)
+    const normalizedCode = normalizeRoomCode(code)
+
+    // Get room
+    const room = await getRoomByCode(normalizedCode)
+    if (!room) {
+      return NextResponse.json({ error: 'Room not found' }, { status: 404 })
+    }
+
+    // Generate redirect URL
+    const baseUrl = process.env.NEXT_PUBLIC_URL || 'http://localhost:3000'
+    const redirectUrl = `${baseUrl}/arcade/rooms/${room.id}`
+
+    return NextResponse.json({
+      roomId: room.id,
+      redirectUrl,
+      room,
+    })
+  } catch (error) {
+    console.error('Failed to find room by code:', error)
+    return NextResponse.json({ error: 'Failed to find room by code' }, { status: 500 })
+  }
+}

apps/web/src/app/api/arcade/rooms/current/route.ts

@@ -0,0 +1,52 @@
+import { NextResponse } from 'next/server'
+import { getUserRooms } from '@/lib/arcade/room-membership'
+import { getRoomById } from '@/lib/arcade/room-manager'
+import { getRoomMembers } from '@/lib/arcade/room-membership'
+import { getRoomActivePlayers } from '@/lib/arcade/player-manager'
+import { getViewerId } from '@/lib/viewer'
+
+/**
+ * GET /api/arcade/rooms/current
+ * Returns the user's current room (if any)
+ */
+export async function GET() {
+  try {
+    const userId = await getViewerId()
+
+    // Get all rooms user is in (should be at most 1 due to modal room enforcement)
+    const roomIds = await getUserRooms(userId)
+
+    if (roomIds.length === 0) {
+      return NextResponse.json({ room: null }, { status: 200 })
+    }
+
+    const roomId = roomIds[0]
+
+    // Get room data
+    const room = await getRoomById(roomId)
+    if (!room) {
+      return NextResponse.json({ error: 'Room not found' }, { status: 404 })
+    }
+
+    // Get members
+    const members = await getRoomMembers(roomId)
+
+    // Get active players for all members
+    const memberPlayers = await getRoomActivePlayers(roomId)
+
+    // Convert Map to object for JSON serialization
+    const memberPlayersObj: Record<string, any[]> = {}
+    for (const [uid, players] of memberPlayers.entries()) {
+      memberPlayersObj[uid] = players
+    }
+
+    return NextResponse.json({
+      room,
+      members,
+      memberPlayers: memberPlayersObj,
+    })
+  } catch (error) {
+    console.error('[Current Room API] Error:', error)
+    return NextResponse.json({ error: 'Failed to fetch current room' }, { status: 500 })
+  }
+}

apps/web/src/app/api/arcade/rooms/route.ts

@@ -0,0 +1,126 @@
+import { type NextRequest, NextResponse } from 'next/server'
+import { createRoom, listActiveRooms } from '@/lib/arcade/room-manager'
+import { addRoomMember, getRoomMembers, isMember } from '@/lib/arcade/room-membership'
+import { getRoomActivePlayers } from '@/lib/arcade/player-manager'
+import { getViewerId } from '@/lib/viewer'
+import type { GameName } from '@/lib/arcade/validation'
+
+/**
+ * GET /api/arcade/rooms
+ * List all active public rooms (lobby view)
+ * Query params:
+ *   - gameName?: string - Filter by game
+ */
+export async function GET(req: NextRequest) {
+  try {
+    const { searchParams } = new URL(req.url)
+    const gameName = searchParams.get('gameName') as GameName | null
+
+    const viewerId = await getViewerId()
+    const rooms = await listActiveRooms(gameName || undefined)
+
+    // Enrich with member counts, player counts, and membership status
+    const roomsWithCounts = await Promise.all(
+      rooms.map(async (room) => {
+        const members = await getRoomMembers(room.id)
+        const playerMap = await getRoomActivePlayers(room.id)
+        const userIsMember = await isMember(room.id, viewerId)
+
+        let totalPlayers = 0
+        for (const players of playerMap.values()) {
+          totalPlayers += players.length
+        }
+
+        return {
+          id: room.id,
+          name: room.name,
+          code: room.code,
+          gameName: room.gameName,
+          status: room.status,
+          createdAt: room.createdAt,
+          creatorName: room.creatorName,
+          isLocked: room.isLocked,
+          memberCount: members.length,
+          playerCount: totalPlayers,
+          isMember: userIsMember,
+        }
+      })
+    )
+
+    return NextResponse.json({ rooms: roomsWithCounts })
+  } catch (error) {
+    console.error('Failed to fetch rooms:', error)
+    return NextResponse.json({ error: 'Failed to fetch rooms' }, { status: 500 })
+  }
+}
+
+/**
+ * POST /api/arcade/rooms
+ * Create a new room
+ * Body:
+ *   - name: string
+ *   - gameName: string
+ *   - gameConfig?: object
+ *   - ttlMinutes?: number
+ */
+export async function POST(req: NextRequest) {
+  try {
+    const viewerId = await getViewerId()
+    const body = await req.json()
+
+    // Validate required fields
+    if (!body.name || !body.gameName) {
+      return NextResponse.json(
+        { error: 'Missing required fields: name, gameName' },
+        { status: 400 }
+      )
+    }
+
+    // Validate game name
+    const validGames: GameName[] = ['matching', 'memory-quiz', 'complement-race']
+    if (!validGames.includes(body.gameName)) {
+      return NextResponse.json({ error: 'Invalid game name' }, { status: 400 })
+    }
+
+    // Validate name length
+    if (body.name.length > 50) {
+      return NextResponse.json({ error: 'Room name too long (max 50 characters)' }, { status: 400 })
+    }
+
+    // Get display name from body or generate from viewerId
+    const displayName = body.creatorName || `Guest ${viewerId.slice(-4)}`
+
+    // Create room
+    const room = await createRoom({
+      name: body.name,
+      createdBy: viewerId,
+      creatorName: displayName,
+      gameName: body.gameName,
+      gameConfig: body.gameConfig || {},
+      ttlMinutes: body.ttlMinutes,
+    })
+
+    // Add creator as first member
+    await addRoomMember({
+      roomId: room.id,
+      userId: viewerId,
+      displayName,
+      isCreator: true,
+    })
+
+    // Generate join URL
+    const baseUrl = process.env.NEXT_PUBLIC_URL || 'http://localhost:3000'
+    const joinUrl = `${baseUrl}/arcade/rooms/${room.id}`
+
+    return NextResponse.json(
+      {
+        room,
+        joinUrl,
+      },
+      { status: 201 }
+    )
+  } catch (error) {
+    console.error('Failed to create room:', error)
+    return NextResponse.json({ error: 'Failed to create room' }, { status: 500 })
+  }
+}

apps/web/src/app/api/auth/[...nextauth]/route.ts

@@ -0,0 +1,17 @@
+/**
+ * NextAuth v5 API route handlers
+ *
+ * Handles all NextAuth routes:
+ * - GET  /api/auth/signin
+ * - POST /api/auth/signin/:provider
+ * - GET  /api/auth/signout
+ * - POST /api/auth/signout
+ * - GET  /api/auth/session
+ * - GET  /api/auth/csrf
+ * - POST /api/auth/callback/:provider
+ * - etc.
+ */
+
+import { handlers } from '@/auth'
+
+export const { GET, POST } = handlers

apps/web/src/app/api/build-info/route.ts

@@ -0,0 +1,6 @@
+import { NextResponse } from 'next/server'
+import buildInfo from '@/generated/build-info.json'
+
+export async function GET() {
+  return NextResponse.json(buildInfo)
+}

apps/web/src/app/api/debug/active-players/route.ts

@@ -0,0 +1,57 @@
+import { NextResponse } from 'next/server'
+import { getViewerId } from '@/lib/viewer'
+import { getActivePlayers } from '@/lib/arcade/player-manager'
+import { db, schema } from '@/db'
+import { eq } from 'drizzle-orm'
+
+/**
+ * GET /api/debug/active-players
+ * Debug endpoint to check active players for current user
+ */
+export async function GET() {
+  try {
+    const viewerId = await getViewerId()
+
+    // Get user record
+    const user = await db.query.users.findFirst({
+      where: eq(schema.users.guestId, viewerId),
+    })
+
+    if (!user) {
+      return NextResponse.json({ error: 'User not found', viewerId }, { status: 404 })
+    }
+
+    // Get ALL players for this user
+    const allPlayers = await db.query.players.findMany({
+      where: eq(schema.players.userId, user.id),
+    })
+
+    // Get active players using the helper
+    const activePlayers = await getActivePlayers(viewerId)
+
+    return NextResponse.json({
+      viewerId,
+      userId: user.id,
+      allPlayers: allPlayers.map((p) => ({
+        id: p.id,
+        name: p.name,
+        emoji: p.emoji,
+        isActive: p.isActive,
+      })),
+      activePlayers: activePlayers.map((p) => ({
+        id: p.id,
+        name: p.name,
+        emoji: p.emoji,
+        isActive: p.isActive,
+      })),
+      activeCount: activePlayers.length,
+      totalCount: allPlayers.length,
+    })
+  } catch (error) {
+    console.error('Failed to fetch active players:', error)
+    return NextResponse.json(
+      { error: 'Failed to fetch active players', details: String(error) },
+      { status: 500 }
+    )
+  }
+}

apps/web/src/app/api/download/[id]/route.ts

@@ -1,10 +1,7 @@
-import { NextRequest, NextResponse } from 'next/server'
+import { type NextRequest, NextResponse } from 'next/server'
 import { assetStore } from '@/lib/asset-store'
 
-export async function GET(
-  request: NextRequest,
-  { params }: { params: { id: string } }
-) {
+export async function GET(_request: NextRequest, { params }: { params: { id: string } }) {
   try {
     const { id } = params
 
@@ -15,30 +12,35 @@ export async function GET(
     const asset = await assetStore.get(id)
     if (!asset) {
       console.log('❌ Asset not found in store')
-      return NextResponse.json({
-        error: 'Asset not found or expired'
-      }, { status: 404 })
+      return NextResponse.json(
+        {
+          error: 'Asset not found or expired',
+        },
+        { status: 404 }
+      )
     }
 
     console.log('✅ Asset found, serving download')
 
     // Return file with appropriate headers
-    return new NextResponse(asset.data, {
+    return new NextResponse(new Uint8Array(asset.data), {
       status: 200,
       headers: {
         'Content-Type': asset.mimeType,
         'Content-Disposition': `attachment; filename="${asset.filename}"`,
         'Content-Length': asset.data.length.toString(),
         'Cache-Control': 'private, no-cache, no-store, must-revalidate',
-        'Expires': '0',
-        'Pragma': 'no-cache'
-      }
+        Expires: '0',
+        Pragma: 'no-cache',
+      },
     })
-
   } catch (error) {
     console.error('❌ Download failed:', error)
-    return NextResponse.json({
-      error: 'Failed to download file'
-    }, { status: 500 })
+    return NextResponse.json(
+      {
+        error: 'Failed to download file',
+      },
+      { status: 500 }
+    )
   }
-}
+}

apps/web/src/app/api/download/assets/[id]/route.ts

@@ -1,19 +1,13 @@
-import { NextRequest, NextResponse } from 'next/server'
+import { type NextRequest, NextResponse } from 'next/server'
 import { assetStore } from '@/lib/asset-store'
 
-export async function GET(
-  request: NextRequest,
-  { params }: { params: { id: string } }
-) {
+export async function GET(_request: NextRequest, { params }: { params: { id: string } }) {
   try {
     const { id } = params
 
     const asset = await assetStore.get(id)
     if (!asset) {
-      return NextResponse.json(
-        { error: 'Asset not found' },
-        { status: 404 }
-      )
+      return NextResponse.json({ error: 'Asset not found' }, { status: 404 })
     }
 
     // Set appropriate headers for download
@@ -23,16 +17,12 @@ export async function GET(
     headers.set('Content-Length', asset.data.length.toString())
     headers.set('Cache-Control', 'no-cache, no-store, must-revalidate')
 
-    return new NextResponse(asset.data, {
+    return new NextResponse(new Uint8Array(asset.data), {
       status: 200,
-      headers
+      headers,
     })
-
   } catch (error) {
     console.error('Asset download error:', error)
-    return NextResponse.json(
-      { error: 'Failed to download asset' },
-      { status: 500 }
-    )
+    return NextResponse.json({ error: 'Failed to download asset' }, { status: 500 })
   }
-}
+}

apps/web/src/app/api/generate/route.ts

@@ -1,5 +1,5 @@
-import { NextRequest, NextResponse } from 'next/server'
 import { SorobanGenerator } from '@soroban/core'
+import { type NextRequest, NextResponse } from 'next/server'
 import path from 'path'
 
 // Global generator instance for better performance
@@ -36,14 +36,17 @@ export async function POST(request: NextRequest) {
     // Check dependencies before generating
     const deps = await gen.checkDependencies?.()
     if (deps && (!deps.python || !deps.typst)) {
-      return NextResponse.json({
-        error: 'Missing system dependencies',
-        details: {
-          python: deps.python ? '✅ Available' : '❌ Missing Python 3',
-          typst: deps.typst ? '✅ Available' : '❌ Missing Typst',
-          qpdf: deps.qpdf ? '✅ Available' : '⚠️ Missing qpdf (optional)'
-        }
-      }, { status: 500 })
+      return NextResponse.json(
+        {
+          error: 'Missing system dependencies',
+          details: {
+            python: deps.python ? '✅ Available' : '❌ Missing Python 3',
+            typst: deps.typst ? '✅ Available' : '❌ Missing Typst',
+            qpdf: deps.qpdf ? '✅ Available' : '⚠️ Missing qpdf (optional)',
+          },
+        },
+        { status: 500 }
+      )
     }
 
     // Generate flashcards using Python via TypeScript bindings
@@ -52,36 +55,38 @@ export async function POST(request: NextRequest) {
 
     // SorobanGenerator.generate() returns PDF data directly as Buffer
     if (!Buffer.isBuffer(result)) {
-      throw new Error('Expected PDF Buffer from generator, got: ' + typeof result)
+      throw new Error(`Expected PDF Buffer from generator, got: ${typeof result}`)
     }
     const pdfBuffer = result
     // Create filename for download
     const filename = `soroban-flashcards-${config.range || 'cards'}.pdf`
 
     // Return PDF directly as download
-    return new NextResponse(pdfBuffer, {
+    return new NextResponse(new Uint8Array(pdfBuffer), {
       headers: {
         'Content-Type': 'application/pdf',
         'Content-Disposition': `attachment; filename="${filename}"`,
-        'Content-Length': pdfBuffer.length.toString()
-      }
+        'Content-Length': pdfBuffer.length.toString(),
+      },
     })
-
   } catch (error) {
     console.error('❌ Generation failed:', error)
 
-    return NextResponse.json({
-      error: 'Failed to generate flashcards',
-      details: error instanceof Error ? error.message : 'Unknown error',
-      success: false
-    }, { status: 500 })
+    return NextResponse.json(
+      {
+        error: 'Failed to generate flashcards',
+        details: error instanceof Error ? error.message : 'Unknown error',
+        success: false,
+      },
+      { status: 500 }
+    )
   }
 }
 
 // Helper functions to calculate metadata
-function calculateCardCount(range: string, step: number): number {
+function _calculateCardCount(range: string, step: number): number {
   if (range.includes('-')) {
-    const [start, end] = range.split('-').map(n => parseInt(n) || 0)
+    const [start, end] = range.split('-').map((n) => parseInt(n, 10) || 0)
     return Math.floor((end - start + 1) / step)
   }
 
@@ -92,9 +97,9 @@ function calculateCardCount(range: string, step: number): number {
   return 1
 }
 
-function generateNumbersFromRange(range: string, step: number): number[] {
+function _generateNumbersFromRange(range: string, step: number): number[] {
   if (range.includes('-')) {
-    const [start, end] = range.split('-').map(n => parseInt(n) || 0)
+    const [start, end] = range.split('-').map((n) => parseInt(n, 10) || 0)
     const numbers: number[] = []
     for (let i = start; i <= end; i += step) {
       numbers.push(i)
@@ -104,26 +109,29 @@ function generateNumbersFromRange(range: string, step: number): number[] {
   }
 
   if (range.includes(',')) {
-    return range.split(',').map(n => parseInt(n.trim()) || 0)
+    return range.split(',').map((n) => parseInt(n.trim(), 10) || 0)
   }
 
-  return [parseInt(range) || 0]
+  return [parseInt(range, 10) || 0]
 }
 
 // Health check endpoint
 export async function GET() {
   try {
     const gen = await getGenerator()
-    const deps = await gen.checkDependencies?.() || { python: true, typst: true, qpdf: true }
+    const deps = (await gen.checkDependencies?.()) || { python: true, typst: true, qpdf: true }
 
     return NextResponse.json({
       status: 'healthy',
-      dependencies: deps
+      dependencies: deps,
     })
   } catch (error) {
-    return NextResponse.json({
-      status: 'unhealthy',
-      error: error instanceof Error ? error.message : 'Unknown error'
-    }, { status: 500 })
+    return NextResponse.json(
+      {
+        status: 'unhealthy',
+        error: error instanceof Error ? error.message : 'Unknown error',
+      },
+      { status: 500 }
+    )
   }
-}
+}

apps/web/src/app/api/players/[id]/route.ts

@@ -0,0 +1,100 @@
+import { and, eq } from 'drizzle-orm'
+import { type NextRequest, NextResponse } from 'next/server'
+import { db, schema } from '@/db'
+import { getViewerId } from '@/lib/viewer'
+
+/**
+ * PATCH /api/players/[id]
+ * Update a player (only if it belongs to the current viewer)
+ */
+export async function PATCH(req: NextRequest, { params }: { params: { id: string } }) {
+  try {
+    const viewerId = await getViewerId()
+    const body = await req.json()
+
+    // Get user record (must exist if player exists)
+    const user = await db.query.users.findFirst({
+      where: eq(schema.users.guestId, viewerId),
+    })
+
+    if (!user) {
+      return NextResponse.json({ error: 'User not found' }, { status: 404 })
+    }
+
+    // Check if user has an active arcade session
+    // If so, prevent changing isActive status (players are locked during games)
+    if (body.isActive !== undefined) {
+      const activeSession = await db.query.arcadeSessions.findFirst({
+        where: eq(schema.arcadeSessions.userId, viewerId),
+      })
+
+      if (activeSession) {
+        return NextResponse.json(
+          {
+            error: 'Cannot modify active players during an active game session',
+            activeGame: activeSession.currentGame,
+            gameUrl: activeSession.gameUrl,
+          },
+          { status: 403 }
+        )
+      }
+    }
+
+    // Security: Only allow updating specific fields (excludes userId)
+    // Update player (only if it belongs to this user)
+    const [updatedPlayer] = await db
+      .update(schema.players)
+      .set({
+        ...(body.name !== undefined && { name: body.name }),
+        ...(body.emoji !== undefined && { emoji: body.emoji }),
+        ...(body.color !== undefined && { color: body.color }),
+        ...(body.isActive !== undefined && { isActive: body.isActive }),
+        // userId is explicitly NOT included - it comes from session
+      })
+      .where(and(eq(schema.players.id, params.id), eq(schema.players.userId, user.id)))
+      .returning()
+
+    if (!updatedPlayer) {
+      return NextResponse.json({ error: 'Player not found or unauthorized' }, { status: 404 })
+    }
+
+    return NextResponse.json({ player: updatedPlayer })
+  } catch (error) {
+    console.error('Failed to update player:', error)
+    return NextResponse.json({ error: 'Failed to update player' }, { status: 500 })
+  }
+}
+
+/**
+ * DELETE /api/players/[id]
+ * Delete a player (only if it belongs to the current viewer)
+ */
+export async function DELETE(_req: NextRequest, { params }: { params: { id: string } }) {
+  try {
+    const viewerId = await getViewerId()
+
+    // Get user record (must exist if player exists)
+    const user = await db.query.users.findFirst({
+      where: eq(schema.users.guestId, viewerId),
+    })
+
+    if (!user) {
+      return NextResponse.json({ error: 'User not found' }, { status: 404 })
+    }
+
+    // Delete player (only if it belongs to this user)
+    const [deletedPlayer] = await db
+      .delete(schema.players)
+      .where(and(eq(schema.players.id, params.id), eq(schema.players.userId, user.id)))
+      .returning()
+
+    if (!deletedPlayer) {
+      return NextResponse.json({ error: 'Player not found or unauthorized' }, { status: 404 })
+    }
+
+    return NextResponse.json({ success: true, player: deletedPlayer })
+  } catch (error) {
+    console.error('Failed to delete player:', error)
+    return NextResponse.json({ error: 'Failed to delete player' }, { status: 500 })
+  }
+}

apps/web/src/app/api/players/__tests__/arcade-session-validation.e2e.test.ts

@@ -0,0 +1,255 @@
+/**
+ * @vitest-environment node
+ */
+
+import { eq } from 'drizzle-orm'
+import { NextRequest } from 'next/server'
+import { afterEach, beforeEach, describe, expect, it } from 'vitest'
+import { db, schema } from '../../../../db'
+import { PATCH } from '../[id]/route'
+
+/**
+ * Arcade Session Validation E2E Tests
+ *
+ * These tests verify that the PATCH /api/players/[id] endpoint
+ * correctly prevents isActive changes when user has an active arcade session.
+ */
+
+describe('PATCH /api/players/[id] - Arcade Session Validation', () => {
+  let testUserId: string
+  let testGuestId: string
+  let testPlayerId: string
+
+  beforeEach(async () => {
+    // Create a test user with unique guest ID
+    testGuestId = `test-guest-${Date.now()}-${Math.random().toString(36).slice(2)}`
+    const [user] = await db.insert(schema.users).values({ guestId: testGuestId }).returning()
+    testUserId = user.id
+
+    // Create a test player
+    const [player] = await db
+      .insert(schema.players)
+      .values({
+        userId: testUserId,
+        name: 'Test Player',
+        emoji: '😀',
+        color: '#3b82f6',
+        isActive: false,
+      })
+      .returning()
+    testPlayerId = player.id
+  })
+
+  afterEach(async () => {
+    // Clean up: delete test arcade session (if exists)
+    await db.delete(schema.arcadeSessions).where(eq(schema.arcadeSessions.userId, testGuestId))
+    // Clean up: delete test user (cascade deletes players)
+    await db.delete(schema.users).where(eq(schema.users.id, testUserId))
+  })
+
+  it('should return 403 when trying to change isActive with active arcade session', async () => {
+    // Create an active arcade session
+    const now = new Date()
+    await db.insert(schema.arcadeSessions).values({
+      userId: testGuestId,
+      currentGame: 'matching',
+      gameUrl: '/arcade/matching',
+      gameState: JSON.stringify({}),
+      activePlayers: JSON.stringify([testPlayerId]),
+      startedAt: now,
+      lastActivityAt: now,
+      expiresAt: new Date(now.getTime() + 3600000), // 1 hour from now
+      version: 1,
+    })
+
+    // Mock request to change isActive
+    const mockRequest = new NextRequest(`http://localhost:3000/api/players/${testPlayerId}`, {
+      method: 'PATCH',
+      headers: {
+        'Content-Type': 'application/json',
+        Cookie: `guest_id=${testGuestId}`,
+      },
+      body: JSON.stringify({ isActive: true }),
+    })
+
+    // Mock getViewerId by setting cookie
+    const response = await PATCH(mockRequest, { params: { id: testPlayerId } })
+    const data = await response.json()
+
+    // Should be rejected with 403
+    expect(response.status).toBe(403)
+    expect(data.error).toContain('Cannot modify active players during an active game session')
+    expect(data.activeGame).toBe('matching')
+    expect(data.gameUrl).toBe('/arcade/matching')
+
+    // Verify player isActive was NOT changed
+    const player = await db.query.players.findFirst({
+      where: eq(schema.players.id, testPlayerId),
+    })
+    expect(player?.isActive).toBe(false) // Still false
+  })
+
+  it('should allow isActive change when no active arcade session', async () => {
+    // No arcade session created
+
+    // Mock request to change isActive
+    const mockRequest = new NextRequest(`http://localhost:3000/api/players/${testPlayerId}`, {
+      method: 'PATCH',
+      headers: {
+        'Content-Type': 'application/json',
+        Cookie: `guest_id=${testGuestId}`,
+      },
+      body: JSON.stringify({ isActive: true }),
+    })
+
+    const response = await PATCH(mockRequest, { params: { id: testPlayerId } })
+    const data = await response.json()
+
+    // Should succeed
+    expect(response.status).toBe(200)
+    expect(data.player.isActive).toBe(true)
+
+    // Verify player isActive was changed
+    const player = await db.query.players.findFirst({
+      where: eq(schema.players.id, testPlayerId),
+    })
+    expect(player?.isActive).toBe(true)
+  })
+
+  it('should allow non-isActive changes even with active arcade session', async () => {
+    // Create an active arcade session
+    const now = new Date()
+    await db.insert(schema.arcadeSessions).values({
+      userId: testGuestId,
+      currentGame: 'matching',
+      gameUrl: '/arcade/matching',
+      gameState: JSON.stringify({}),
+      activePlayers: JSON.stringify([testPlayerId]),
+      startedAt: now,
+      lastActivityAt: now,
+      expiresAt: new Date(now.getTime() + 3600000), // 1 hour from now
+      version: 1,
+    })
+
+    // Mock request to change name/emoji/color (NOT isActive)
+    const mockRequest = new NextRequest(`http://localhost:3000/api/players/${testPlayerId}`, {
+      method: 'PATCH',
+      headers: {
+        'Content-Type': 'application/json',
+        Cookie: `guest_id=${testGuestId}`,
+      },
+      body: JSON.stringify({
+        name: 'Updated Name',
+        emoji: '🎉',
+        color: '#ff0000',
+      }),
+    })
+
+    const response = await PATCH(mockRequest, { params: { id: testPlayerId } })
+    const data = await response.json()
+
+    // Should succeed
+    expect(response.status).toBe(200)
+    expect(data.player.name).toBe('Updated Name')
+    expect(data.player.emoji).toBe('🎉')
+    expect(data.player.color).toBe('#ff0000')
+
+    // Verify changes were applied
+    const player = await db.query.players.findFirst({
+      where: eq(schema.players.id, testPlayerId),
+    })
+    expect(player?.name).toBe('Updated Name')
+    expect(player?.emoji).toBe('🎉')
+    expect(player?.color).toBe('#ff0000')
+  })
+
+  it('should allow isActive change after arcade session ends', async () => {
+    // Create an active arcade session
+    const now = new Date()
+    await db.insert(schema.arcadeSessions).values({
+      userId: testGuestId,
+      currentGame: 'matching',
+      gameUrl: '/arcade/matching',
+      gameState: JSON.stringify({}),
+      activePlayers: JSON.stringify([testPlayerId]),
+      startedAt: now,
+      lastActivityAt: now,
+      expiresAt: new Date(now.getTime() + 3600000), // 1 hour from now
+      version: 1,
+    })
+
+    // End the session
+    await db.delete(schema.arcadeSessions).where(eq(schema.arcadeSessions.userId, testGuestId))
+
+    // Mock request to change isActive
+    const mockRequest = new NextRequest(`http://localhost:3000/api/players/${testPlayerId}`, {
+      method: 'PATCH',
+      headers: {
+        'Content-Type': 'application/json',
+        Cookie: `guest_id=${testGuestId}`,
+      },
+      body: JSON.stringify({ isActive: true }),
+    })
+
+    const response = await PATCH(mockRequest, { params: { id: testPlayerId } })
+    const data = await response.json()
+
+    // Should succeed
+    expect(response.status).toBe(200)
+    expect(data.player.isActive).toBe(true)
+  })
+
+  it('should handle multiple players with different isActive states', async () => {
+    // Create additional players
+    const [player2] = await db
+      .insert(schema.players)
+      .values({
+        userId: testUserId,
+        name: 'Player 2',
+        emoji: '😎',
+        color: '#8b5cf6',
+        isActive: true,
+      })
+      .returning()
+
+    // Create arcade session
+    const now2 = new Date()
+    await db.insert(schema.arcadeSessions).values({
+      userId: testGuestId,
+      currentGame: 'matching',
+      gameUrl: '/arcade/matching',
+      gameState: JSON.stringify({}),
+      activePlayers: JSON.stringify([testPlayerId, player2.id]),
+      startedAt: now2,
+      lastActivityAt: now2,
+      expiresAt: new Date(now2.getTime() + 3600000), // 1 hour from now
+      version: 1,
+    })
+
+    // Try to toggle player1 (inactive -> active) - should fail
+    const request1 = new NextRequest(`http://localhost:3000/api/players/${testPlayerId}`, {
+      method: 'PATCH',
+      headers: {
+        'Content-Type': 'application/json',
+        Cookie: `guest_id=${testGuestId}`,
+      },
+      body: JSON.stringify({ isActive: true }),
+    })
+
+    const response1 = await PATCH(request1, { params: { id: testPlayerId } })
+    expect(response1.status).toBe(403)
+
+    // Try to toggle player2 (active -> inactive) - should also fail
+    const request2 = new NextRequest(`http://localhost:3000/api/players/${player2.id}`, {
+      method: 'PATCH',
+      headers: {
+        'Content-Type': 'application/json',
+        Cookie: `guest_id=${testGuestId}`,
+      },
+      body: JSON.stringify({ isActive: false }),
+    })
+
+    const response2 = await PATCH(request2, { params: { id: player2.id } })
+    expect(response2.status).toBe(403)
+  })
+})

apps/web/src/app/api/players/route.ts

@@ -0,0 +1,91 @@
+import { eq } from 'drizzle-orm'
+import { type NextRequest, NextResponse } from 'next/server'
+import { db, schema } from '@/db'
+import { getViewerId } from '@/lib/viewer'
+
+/**
+ * GET /api/players
+ * List all players for the current viewer (guest or user)
+ */
+export async function GET() {
+  try {
+    const viewerId = await getViewerId()
+
+    // Get or create user record
+    const user = await getOrCreateUser(viewerId)
+
+    // Get all players for this user
+    const players = await db.query.players.findMany({
+      where: eq(schema.players.userId, user.id),
+      orderBy: (players, { desc }) => [desc(players.createdAt)],
+    })
+
+    return NextResponse.json({ players })
+  } catch (error) {
+    console.error('Failed to fetch players:', error)
+    return NextResponse.json({ error: 'Failed to fetch players' }, { status: 500 })
+  }
+}
+
+/**
+ * POST /api/players
+ * Create a new player for the current viewer
+ */
+export async function POST(req: NextRequest) {
+  try {
+    const viewerId = await getViewerId()
+    const body = await req.json()
+
+    // Validate required fields
+    if (!body.name || !body.emoji || !body.color) {
+      return NextResponse.json(
+        { error: 'Missing required fields: name, emoji, color' },
+        { status: 400 }
+      )
+    }
+
+    // Get or create user record
+    const user = await getOrCreateUser(viewerId)
+
+    // Create player
+    const [player] = await db
+      .insert(schema.players)
+      .values({
+        userId: user.id,
+        name: body.name,
+        emoji: body.emoji,
+        color: body.color,
+        isActive: body.isActive ?? false,
+      })
+      .returning()
+
+    return NextResponse.json({ player }, { status: 201 })
+  } catch (error) {
+    console.error('Failed to create player:', error)
+    return NextResponse.json({ error: 'Failed to create player' }, { status: 500 })
+  }
+}
+
+/**
+ * Get or create a user record for the given viewer ID (guest or user)
+ */
+async function getOrCreateUser(viewerId: string) {
+  // Try to find existing user by guest ID
+  let user = await db.query.users.findFirst({
+    where: eq(schema.users.guestId, viewerId),
+  })
+
+  // If no user exists, create one
+  if (!user) {
+    const [newUser] = await db
+      .insert(schema.users)
+      .values({
+        guestId: viewerId,
+      })
+      .returning()
+
+    user = newUser
+  }
+
+  return user
+}

apps/web/src/app/api/preview/route.ts

@@ -1,164 +0,0 @@
-import { NextRequest, NextResponse } from 'next/server'
-import { generateSorobanSVG } from '@/lib/typst-soroban'
-
-export async function POST(request: NextRequest) {
-  try {
-    const config = await request.json()
-
-    // Debug: log the received config
-    console.log('🔍 Preview config:', JSON.stringify(config, null, 2))
-
-    // Ensure range is set with a default
-    if (!config.range) {
-      config.range = '0-9'
-    }
-
-    // For preview, limit to a few numbers and use SVG format for fast rendering
-    const previewConfig = {
-      ...config,
-      range: getPreviewRange(config.range),
-      format: 'svg', // Use SVG format for preview
-      cardsPerPage: 6 // Standard card layout
-    }
-
-    console.log('🔍 Processed preview config:', JSON.stringify(previewConfig, null, 2))
-
-    // Generate real SVG preview using typst.ts
-    console.log('🚀 Generating soroban SVG preview via typst.ts')
-
-    try {
-      // Parse the numbers from the range for individual cards
-      const numbers = parseNumbersFromRange(getPreviewRange(config.range))
-      console.log('🔍 Generating individual SVGs for numbers:', numbers)
-
-      // Generate individual SVGs for each number using typst.ts
-      const samples = []
-      for (const number of numbers) {
-        try {
-          const typstConfig = {
-            number: number,
-            beadShape: previewConfig.beadShape || 'diamond',
-            colorScheme: previewConfig.colorScheme || 'place-value',
-            hideInactiveBeads: previewConfig.hideInactiveBeads || false,
-            scaleFactor: previewConfig.scaleFactor || 1.0,
-            width: '200pt',
-            height: '250pt'
-          }
-          console.log(`🔍 Generating typst.ts SVG for number ${number}`)
-          const svg = await generateSorobanSVG(typstConfig)
-          console.log(`✅ Generated typst.ts SVG for ${number}, length: ${svg.length}`)
-          samples.push({
-            number,
-            front: svg,
-            back: number.toString()
-          })
-        } catch (error) {
-          console.error(`❌ Failed to generate SVG for number ${number}:`, error instanceof Error ? error.message : error)
-          samples.push({
-            number,
-            front: `<svg width="200" height="300" viewBox="0 0 200 300" xmlns="http://www.w3.org/2000/svg">
-              <rect x="10" y="10" width="180" height="280" fill="none" stroke="#ccc" stroke-width="2"/>
-              <line x1="20" y1="150" x2="180" y2="150" stroke="#ccc" stroke-width="2"/>
-              <text x="100" y="160" text-anchor="middle" font-size="24" fill="#666">SVG Error</text>
-              <text x="100" y="180" text-anchor="middle" font-size="16" fill="#999">${number}</text>
-            </svg>`,
-            back: number.toString()
-          })
-        }
-      }
-
-      return NextResponse.json({
-        count: numbers.length,
-        samples,
-        note: 'Real individual SVGs generated by typst.ts'
-      })
-
-    } catch (error) {
-      console.error('⚠️ Typst.ts SVG generation failed, using fallback preview:', error instanceof Error ? error.message : error)
-      return NextResponse.json(getMockPreviewData(config))
-    }
-
-  } catch (error) {
-    console.error('❌ Preview generation failed:', error)
-
-    // Always fall back to mock data for preview
-    const config = await request.json().catch(() => ({ range: '0-9' }))
-    return NextResponse.json(getMockPreviewData(config))
-  }
-}
-
-// Helper function to parse numbers from range string
-function parseNumbersFromRange(range: string): number[] {
-  if (!range) return [0, 1, 2]
-
-  if (range.includes('-')) {
-    const [start] = range.split('-')
-    const startNum = parseInt(start) || 0
-    return [startNum, startNum + 1, startNum + 2]
-  }
-
-  if (range.includes(',')) {
-    return range.split(',').slice(0, 3).map(n => parseInt(n.trim()) || 0)
-  }
-
-  const num = parseInt(range) || 0
-  return [num, num + 1, num + 2]
-}
-
-// Helper function to limit range for preview
-function getPreviewRange(range: string): string {
-  if (!range) return '0,1,2'
-
-  if (range.includes('-')) {
-    const [start] = range.split('-')
-    const startNum = parseInt(start) || 0
-    return `${startNum},${startNum + 1},${startNum + 2}`
-  }
-
-  if (range.includes(',')) {
-    const numbers = range.split(',').slice(0, 3)
-    return numbers.join(',')
-  }
-
-  return range
-}
-
-// Mock preview data for development and fallback
-function getMockPreviewData(config: any) {
-  const range = config.range || '0-9'
-  let numbers: number[]
-
-  if (range.includes('-')) {
-    const [start] = range.split('-')
-    const startNum = parseInt(start) || 0
-    numbers = [startNum, startNum + 1, startNum + 2]
-  } else if (range.includes(',')) {
-    numbers = range.split(',').slice(0, 3).map((n: string) => parseInt(n.trim()) || 0)
-  } else {
-    const num = parseInt(range) || 0
-    numbers = [num, num + 1, num + 2]
-  }
-
-  return {
-    count: numbers.length,
-    samples: numbers.map(number => ({
-      number,
-      front: `<svg width="200" height="300" viewBox="0 0 200 300" xmlns="http://www.w3.org/2000/svg">
-        <rect x="10" y="10" width="180" height="280" fill="none" stroke="#ccc" stroke-width="2"/>
-        <line x1="20" y1="150" x2="180" y2="150" stroke="#ccc" stroke-width="2"/>
-        <text x="100" y="160" text-anchor="middle" font-size="24" fill="#666">Preview Error</text>
-        <text x="100" y="180" text-anchor="middle" font-size="16" fill="#999">${number}</text>
-      </svg>`,
-      back: number.toString()
-    }))
-  }
-}
-
-// Health check endpoint
-export async function GET() {
-  return NextResponse.json({
-    status: 'healthy',
-    endpoint: 'preview',
-    message: 'Preview API is running'
-  })
-}

apps/web/src/app/api/typst-svg/route.ts

@@ -1,154 +0,0 @@
-import { NextRequest, NextResponse } from 'next/server'
-import { $typst } from '@myriaddreamin/typst.ts/dist/esm/contrib/snippet.mjs'
-import fs from 'fs'
-import path from 'path'
-
-export interface TypstSVGRequest {
-  number: number
-  beadShape?: 'diamond' | 'circle' | 'square'
-  colorScheme?: 'monochrome' | 'place-value' | 'heaven-earth' | 'alternating'
-  colorPalette?: 'default' | 'colorblind' | 'mnemonic' | 'grayscale' | 'nature'
-  hideInactiveBeads?: boolean
-  showEmptyColumns?: boolean
-  columns?: number | 'auto'
-  scaleFactor?: number
-  width?: string
-  height?: string
-  fontSize?: string
-  fontFamily?: string
-  transparent?: boolean
-  coloredNumerals?: boolean
-}
-
-// Cache for template content
-let flashcardsTemplate: string | null = null
-
-async function getFlashcardsTemplate(): Promise<string> {
-  if (flashcardsTemplate) {
-    return flashcardsTemplate
-  }
-
-  try {
-    const { getTemplatePath } = require('@soroban/templates')
-    const templatePath = getTemplatePath('flashcards.typ')
-    flashcardsTemplate = fs.readFileSync(templatePath, 'utf-8')
-    return flashcardsTemplate
-  } catch (error) {
-    console.error('Failed to load flashcards template:', error)
-    throw new Error('Template loading failed')
-  }
-}
-
-function processBeadAnnotations(svg: string): string {
-  const { extractBeadAnnotations } = require('@soroban/templates')
-  const result = extractBeadAnnotations(svg)
-
-  if (result.warnings.length > 0) {
-    console.log('ℹ️ SVG bead processing warnings:', result.warnings)
-  }
-
-  console.log(`🔗 Processed ${result.count} bead links into data attributes`)
-  return result.processedSVG
-}
-
-function createTypstContent(config: TypstSVGRequest, template: string): string {
-  const {
-    number,
-    beadShape = 'diamond',
-    colorScheme = 'place-value',
-    colorPalette = 'default',
-    hideInactiveBeads = false,
-    showEmptyColumns = false,
-    columns = 'auto',
-    scaleFactor = 1.0,
-    width = '120pt',
-    height = '160pt',
-    fontSize = '48pt',
-    fontFamily = 'DejaVu Sans',
-    transparent = false,
-    coloredNumerals = false
-  } = config
-
-  return `
-${template}
-
-#set page(
-  width: ${width},
-  height: ${height},
-  margin: 0pt,
-  fill: ${transparent ? 'none' : 'white'}
-)
-
-#set text(font: "${fontFamily}", size: ${fontSize}, fallback: true)
-
-#align(center + horizon)[
-  #box(
-    width: ${width} - 2 * (${width} * 0.05),
-    height: ${height} - 2 * (${height} * 0.05)
-  )[
-    #align(center + horizon)[
-      #scale(x: ${scaleFactor * 100}%, y: ${scaleFactor * 100}%)[
-        #draw-soroban(
-          ${number},
-          columns: ${columns},
-          show-empty: ${showEmptyColumns},
-          hide-inactive: ${hideInactiveBeads},
-          bead-shape: "${beadShape}",
-          color-scheme: "${colorScheme}",
-          color-palette: "${colorPalette}",
-          base-size: 1.0
-        )
-      ]
-    ]
-  ]
-]
-`
-}
-
-export async function POST(request: NextRequest) {
-  try {
-    const config: TypstSVGRequest = await request.json()
-
-    console.log('🎨 Generating typst.ts SVG for number:', config.number)
-
-    // Load template
-    const template = await getFlashcardsTemplate()
-
-    // Create typst content
-    const typstContent = createTypstContent(config, template)
-
-    // Generate SVG using typst.ts
-    const rawSvg = await $typst.svg({ mainContent: typstContent })
-
-    // Post-process to convert bead annotations to data attributes
-    const svg = processBeadAnnotations(rawSvg)
-
-    console.log('✅ Generated and processed typst.ts SVG, length:', svg.length)
-
-    return NextResponse.json({
-      svg,
-      success: true,
-      number: config.number
-    })
-
-  } catch (error) {
-    console.error('❌ Typst SVG generation failed:', error)
-
-    return NextResponse.json(
-      {
-        error: error instanceof Error ? error.message : 'Unknown error',
-        success: false
-      },
-      { status: 500 }
-    )
-  }
-}
-
-// Health check
-export async function GET() {
-  return NextResponse.json({
-    status: 'healthy',
-    endpoint: 'typst-svg',
-    message: 'Typst.ts SVG generation API is running'
-  })
-}

apps/web/src/app/api/typst-template/route.ts

@@ -1,25 +0,0 @@
-import { NextResponse } from 'next/server'
-import fs from 'fs'
-import { getTemplatePath } from '@soroban/templates'
-
-// API endpoint to serve the flashcards.typ template content
-export async function GET() {
-  try {
-    const templatePath = getTemplatePath('flashcards.typ');
-    const flashcardsTemplate = fs.readFileSync(templatePath, 'utf-8')
-
-    return NextResponse.json({
-      template: flashcardsTemplate,
-      success: true
-    })
-  } catch (error) {
-    console.error('Failed to load typst template:', error)
-    return NextResponse.json(
-      {
-        error: 'Failed to load template',
-        success: false
-      },
-      { status: 500 }
-    )
-  }
-}

apps/web/src/app/api/user-stats/route.ts

@@ -0,0 +1,120 @@
+import { eq } from 'drizzle-orm'
+import { type NextRequest, NextResponse } from 'next/server'
+import { db, schema } from '@/db'
+import { getViewerId } from '@/lib/viewer'
+
+/**
+ * GET /api/user-stats
+ * Get user statistics for the current viewer
+ */
+export async function GET() {
+  try {
+    const viewerId = await getViewerId()
+
+    // Get user record
+    const user = await db.query.users.findFirst({
+      where: eq(schema.users.guestId, viewerId),
+    })
+
+    if (!user) {
+      // No user yet, return default stats
+      return NextResponse.json({
+        stats: {
+          gamesPlayed: 0,
+          totalWins: 0,
+          favoriteGameType: null,
+          bestTime: null,
+          highestAccuracy: 0,
+        },
+      })
+    }
+
+    // Get stats record
+    let stats = await db.query.userStats.findFirst({
+      where: eq(schema.userStats.userId, user.id),
+    })
+
+    // If no stats record exists, create one with defaults
+    if (!stats) {
+      const [newStats] = await db
+        .insert(schema.userStats)
+        .values({
+          userId: user.id,
+        })
+        .returning()
+
+      stats = newStats
+    }
+
+    return NextResponse.json({ stats })
+  } catch (error) {
+    console.error('Failed to fetch user stats:', error)
+    return NextResponse.json({ error: 'Failed to fetch user stats' }, { status: 500 })
+  }
+}
+
+/**
+ * PATCH /api/user-stats
+ * Update user statistics for the current viewer
+ */
+export async function PATCH(req: NextRequest) {
+  try {
+    const viewerId = await getViewerId()
+    const body = await req.json()
+
+    // Get or create user record
+    let user = await db.query.users.findFirst({
+      where: eq(schema.users.guestId, viewerId),
+    })
+
+    if (!user) {
+      // Create user if it doesn't exist
+      const [newUser] = await db
+        .insert(schema.users)
+        .values({
+          guestId: viewerId,
+        })
+        .returning()
+
+      user = newUser
+    }
+
+    // Get existing stats
+    const stats = await db.query.userStats.findFirst({
+      where: eq(schema.userStats.userId, user.id),
+    })
+
+    // Prepare update values
+    const updates: any = {}
+    if (body.gamesPlayed !== undefined) updates.gamesPlayed = body.gamesPlayed
+    if (body.totalWins !== undefined) updates.totalWins = body.totalWins
+    if (body.favoriteGameType !== undefined) updates.favoriteGameType = body.favoriteGameType
+    if (body.bestTime !== undefined) updates.bestTime = body.bestTime
+    if (body.highestAccuracy !== undefined) updates.highestAccuracy = body.highestAccuracy
+
+    if (stats) {
+      // Update existing stats
+      const [updatedStats] = await db
+        .update(schema.userStats)
+        .set(updates)
+        .where(eq(schema.userStats.userId, user.id))
+        .returning()
+
+      return NextResponse.json({ stats: updatedStats })
+    } else {
+      // Create new stats record
+      const [newStats] = await db
+        .insert(schema.userStats)
+        .values({
+          userId: user.id,
+          ...updates,
+        })
+        .returning()
+
+      return NextResponse.json({ stats: newStats }, { status: 201 })
+    }
+  } catch (error) {
+    console.error('Failed to update user stats:', error)
+    return NextResponse.json({ error: 'Failed to update user stats' }, { status: 500 })
+  }
+}

apps/web/src/app/api/viewer/route.ts

@@ -0,0 +1,16 @@
+import { NextResponse } from 'next/server'
+import { getViewerId } from '@/lib/viewer'
+
+/**
+ * GET /api/viewer
+ *
+ * Returns the current viewer's ID (guest or authenticated user)
+ */
+export async function GET() {
+  try {
+    const viewerId = await getViewerId()
+    return NextResponse.json({ viewerId })
+  } catch (_error) {
+    return NextResponse.json({ error: 'No valid viewer session found' }, { status: 401 })
+  }
+}

apps/web/src/app/arcade-rooms/[roomId]/page.tsx

@@ -0,0 +1,665 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { useParams, useRouter } from 'next/navigation'
+import { io, type Socket } from 'socket.io-client'
+import { css } from '../../../../styled-system/css'
+import { PageWithNav } from '@/components/PageWithNav'
+import { useViewerId } from '@/hooks/useViewerId'
+
+interface Room {
+  id: string
+  code: string
+  name: string
+  gameName: string
+  status: 'lobby' | 'playing' | 'finished'
+  createdBy: string
+  creatorName: string
+  isLocked: boolean
+}
+
+interface Member {
+  id: string
+  userId: string
+  displayName: string
+  isCreator: boolean
+  isOnline: boolean
+  joinedAt: Date
+}
+
+interface Player {
+  id: string
+  userId: string
+  name: string
+  emoji: string
+  color: string
+  isActive: boolean
+}
+
+export default function RoomDetailPage() {
+  const params = useParams()
+  const router = useRouter()
+  const roomId = params.roomId as string
+  const { data: guestId } = useViewerId()
+
+  const [room, setRoom] = useState<Room | null>(null)
+  const [members, setMembers] = useState<Member[]>([])
+  const [memberPlayers, setMemberPlayers] = useState<Record<string, Player[]>>({})
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+  const [socket, setSocket] = useState<Socket | null>(null)
+  const [isConnected, setIsConnected] = useState(false)
+
+  useEffect(() => {
+    fetchRoom()
+  }, [roomId])
+
+  useEffect(() => {
+    if (!guestId || !roomId) return
+
+    // Connect to socket
+    const sock = io({ path: '/api/socket' })
+    setSocket(sock)
+
+    sock.on('connect', () => {
+      setIsConnected(true)
+      // Join the room
+      sock.emit('join-room', { roomId, userId: guestId })
+    })
+
+    sock.on('disconnect', () => {
+      setIsConnected(false)
+    })
+
+    sock.on('room-joined', (data) => {
+      console.log('Joined room:', data)
+      if (data.members) {
+        setMembers(data.members)
+      }
+      if (data.memberPlayers) {
+        setMemberPlayers(data.memberPlayers)
+      }
+    })
+
+    sock.on('member-joined', (data) => {
+      console.log('Member joined:', data)
+      if (data.members) {
+        setMembers(data.members)
+      }
+      if (data.memberPlayers) {
+        setMemberPlayers(data.memberPlayers)
+      }
+    })
+
+    sock.on('member-left', (data) => {
+      console.log('Member left:', data)
+      if (data.members) {
+        setMembers(data.members)
+      }
+      if (data.memberPlayers) {
+        setMemberPlayers(data.memberPlayers)
+      }
+    })
+
+    sock.on('room-error', (error) => {
+      console.error('Room error:', error)
+      setError(error.error)
+    })
+
+    sock.on('room-players-updated', (data) => {
+      console.log('Room players updated:', data)
+      if (data.memberPlayers) {
+        setMemberPlayers(data.memberPlayers)
+      }
+    })
+
+    return () => {
+      sock.emit('leave-room', { roomId, userId: guestId })
+      sock.disconnect()
+    }
+  }, [roomId, guestId])
+
+  // Notify room when window regains focus (user might have changed players in another tab)
+  useEffect(() => {
+    if (!socket || !guestId || !roomId) return
+
+    const handleFocus = () => {
+      console.log('Window focused, notifying room of potential player changes')
+      socket.emit('players-updated', { roomId, userId: guestId })
+    }
+
+    window.addEventListener('focus', handleFocus)
+    return () => window.removeEventListener('focus', handleFocus)
+  }, [socket, roomId, guestId])
+
+  const fetchRoom = async () => {
+    try {
+      setLoading(true)
+      const response = await fetch(`/api/arcade/rooms/${roomId}`)
+      if (!response.ok) {
+        throw new Error(`HTTP ${response.status}`)
+      }
+      const data = await response.json()
+      setRoom(data.room)
+      setMembers(data.members || [])
+      setMemberPlayers(data.memberPlayers || {})
+      setError(null)
+    } catch (err) {
+      console.error('Failed to fetch room:', err)
+      setError('Failed to load room')
+    } finally {
+      setLoading(false)
+    }
+  }
+
+  const startGame = () => {
+    if (!room) return
+    // Navigate to the room game page
+    router.push('/arcade/room')
+  }
+
+  const joinRoom = async () => {
+    try {
+      const response = await fetch(`/api/arcade/rooms/${roomId}/join`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ displayName: 'Player' }),
+      })
+
+      if (!response.ok) {
+        const errorData = await response.json()
+
+        // Handle specific room membership conflict
+        if (errorData.code === 'ROOM_MEMBERSHIP_CONFLICT') {
+          alert(errorData.userMessage || errorData.message)
+          // Refresh the page to update room state
+          await fetchRoom()
+          return
+        }
+
+        throw new Error(errorData.error || `HTTP ${response.status}`)
+      }
+
+      const data = await response.json()
+
+      // Show notification if user was auto-removed from other rooms
+      if (data.autoLeave) {
+        console.log(`[Room Join] ${data.autoLeave.message}`)
+        // Could show a toast notification here in the future
+      }
+
+      // Refresh room data to update membership UI
+      await fetchRoom()
+    } catch (err) {
+      console.error('Failed to join room:', err)
+      alert('Failed to join room')
+    }
+  }
+
+  const leaveRoom = async () => {
+    try {
+      const response = await fetch(`/api/arcade/rooms/${roomId}/leave`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+      })
+
+      if (!response.ok) {
+        const errorData = await response.json()
+        throw new Error(errorData.error || `HTTP ${response.status}`)
+      }
+
+      // Navigate to arcade home after successfully leaving
+      router.push('/arcade')
+    } catch (err) {
+      console.error('Failed to leave room:', err)
+      alert('Failed to leave room')
+    }
+  }
+
+  if (loading) {
+    return (
+      <PageWithNav>
+        <div
+          className={css({
+            minH: 'calc(100vh - 80px)',
+            bg: 'linear-gradient(135deg, #0f0f23 0%, #1a1a3a 50%, #2d1b69 100%)',
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'center',
+            color: 'white',
+            fontSize: 'xl',
+          })}
+        >
+          Loading room...
+        </div>
+      </PageWithNav>
+    )
+  }
+
+  if (error || !room) {
+    return (
+      <PageWithNav>
+        <div
+          className={css({
+            minH: 'calc(100vh - 80px)',
+            bg: 'linear-gradient(135deg, #0f0f23 0%, #1a1a3a 50%, #2d1b69 100%)',
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'center',
+            p: '8',
+          })}
+        >
+          <div
+            className={css({
+              bg: 'rgba(255, 255, 255, 0.05)',
+              backdropFilter: 'blur(10px)',
+              border: '1px solid rgba(255, 255, 255, 0.1)',
+              rounded: 'lg',
+              p: '12',
+              textAlign: 'center',
+              maxW: '500px',
+            })}
+          >
+            <p className={css({ fontSize: 'xl', color: 'white', mb: '4' })}>
+              {error || 'Room not found'}
+            </p>
+            <button
+              onClick={() => router.push('/arcade-rooms')}
+              className={css({
+                px: '6',
+                py: '3',
+                bg: '#3b82f6',
+                color: 'white',
+                rounded: 'lg',
+                fontWeight: '600',
+                cursor: 'pointer',
+                _hover: { bg: '#2563eb' },
+              })}
+            >
+              Back to Rooms
+            </button>
+          </div>
+        </div>
+      </PageWithNav>
+    )
+  }
+
+  const onlineMembers = members.filter((m) => m.isOnline)
+
+  // Check if current user is a member
+  const isMember = members.some((m) => m.userId === guestId)
+
+  // Calculate union of all active players in the room
+  const allPlayers: Player[] = []
+  const playerIds = new Set<string>()
+
+  for (const userId in memberPlayers) {
+    for (const player of memberPlayers[userId]) {
+      if (!playerIds.has(player.id)) {
+        playerIds.add(player.id)
+        allPlayers.push(player)
+      }
+    }
+  }
+
+  return (
+    <PageWithNav>
+      <div
+        className={css({
+          minH: 'calc(100vh - 80px)',
+          bg: 'linear-gradient(135deg, #0f0f23 0%, #1a1a3a 50%, #2d1b69 100%)',
+          p: '8',
+        })}
+      >
+        <div className={css({ maxW: '1000px', mx: 'auto' })}>
+          {/* Header */}
+          <div
+            className={css({
+              bg: 'rgba(255, 255, 255, 0.05)',
+              backdropFilter: 'blur(10px)',
+              border: '1px solid rgba(255, 255, 255, 0.1)',
+              rounded: 'lg',
+              p: '8',
+              mb: '6',
+            })}
+          >
+            <div className={css({ mb: '4' })}>
+              <button
+                onClick={() => router.push('/arcade-rooms')}
+                className={css({
+                  display: 'inline-flex',
+                  alignItems: 'center',
+                  gap: '2',
+                  color: '#a0a0ff',
+                  fontSize: 'sm',
+                  cursor: 'pointer',
+                  _hover: { color: '#60a5fa' },
+                  mb: '3',
+                })}
+              >
+                ← Back to Rooms
+              </button>
+            </div>
+            <div
+              className={css({
+                display: 'flex',
+                justifyContent: 'space-between',
+                alignItems: 'center',
+                mb: '4',
+              })}
+            >
+              <div>
+                <h1
+                  className={css({ fontSize: '3xl', fontWeight: 'bold', color: 'white', mb: '2' })}
+                >
+                  {room.name}
+                </h1>
+                <div
+                  className={css({ display: 'flex', gap: '4', color: '#a0a0ff', fontSize: 'sm' })}
+                >
+                  <span>🎮 {room.gameName}</span>
+                  <span>👤 Host: {room.creatorName}</span>
+                  <span
+                    className={css({
+                      px: '3',
+                      py: '1',
+                      bg: 'rgba(255, 255, 255, 0.1)',
+                      color: '#fbbf24',
+                      rounded: 'full',
+                      fontWeight: '600',
+                      fontFamily: 'monospace',
+                    })}
+                  >
+                    Code: {room.code}
+                  </span>
+                </div>
+              </div>
+              <div className={css({ display: 'flex', gap: '3', alignItems: 'center' })}>
+                <div
+                  className={css({
+                    display: 'flex',
+                    alignItems: 'center',
+                    gap: '2',
+                    px: '3',
+                    py: '2',
+                    bg: isConnected ? 'rgba(16, 185, 129, 0.2)' : 'rgba(239, 68, 68, 0.2)',
+                    border: `1px solid ${isConnected ? '#10b981' : '#ef4444'}`,
+                    rounded: 'full',
+                  })}
+                >
+                  <div
+                    className={css({
+                      w: '2',
+                      h: '2',
+                      bg: isConnected ? '#10b981' : '#ef4444',
+                      rounded: 'full',
+                    })}
+                  />
+                  <span
+                    className={css({ color: isConnected ? '#10b981' : '#ef4444', fontSize: 'sm' })}
+                  >
+                    {isConnected ? 'Connected' : 'Disconnected'}
+                  </span>
+                </div>
+              </div>
+            </div>
+          </div>
+
+          {/* Game Players - Union of all active players */}
+          <div
+            className={css({
+              bg: 'rgba(255, 255, 255, 0.05)',
+              backdropFilter: 'blur(10px)',
+              border: '1px solid rgba(255, 255, 255, 0.1)',
+              rounded: 'lg',
+              p: '8',
+              mb: '6',
+            })}
+          >
+            <h2 className={css({ fontSize: '2xl', fontWeight: 'bold', color: 'white', mb: '2' })}>
+              🎯 Game Players ({allPlayers.length})
+            </h2>
+            <p className={css({ color: '#a0a0ff', fontSize: 'sm', mb: '4' })}>
+              These players will participate when the game starts
+            </p>
+            {allPlayers.length > 0 ? (
+              <div className={css({ display: 'flex', gap: '2', flexWrap: 'wrap' })}>
+                {allPlayers.map((player) => (
+                  <div
+                    key={player.id}
+                    className={css({
+                      display: 'flex',
+                      alignItems: 'center',
+                      gap: '2',
+                      px: '3',
+                      py: '2',
+                      bg: 'rgba(59, 130, 246, 0.15)',
+                      border: '2px solid rgba(59, 130, 246, 0.4)',
+                      rounded: 'lg',
+                      color: '#60a5fa',
+                      fontWeight: '600',
+                    })}
+                  >
+                    <span className={css({ fontSize: 'xl' })}>{player.emoji}</span>
+                    <span>{player.name}</span>
+                  </div>
+                ))}
+              </div>
+            ) : (
+              <div
+                className={css({
+                  color: '#6b7280',
+                  fontStyle: 'italic',
+                  textAlign: 'center',
+                  py: '4',
+                })}
+              >
+                No active players yet. Members need to set up their players.
+              </div>
+            )}
+          </div>
+
+          {/* Members List */}
+          <div
+            className={css({
+              bg: 'rgba(255, 255, 255, 0.05)',
+              backdropFilter: 'blur(10px)',
+              border: '1px solid rgba(255, 255, 255, 0.1)',
+              rounded: 'lg',
+              p: '8',
+              mb: '6',
+            })}
+          >
+            <h2 className={css({ fontSize: '2xl', fontWeight: 'bold', color: 'white', mb: '2' })}>
+              👥 Room Members ({onlineMembers.length}/{members.length})
+            </h2>
+            <p className={css({ color: '#a0a0ff', fontSize: 'sm', mb: '4' })}>
+              Users in this room and their active players
+            </p>
+            <div className={css({ display: 'grid', gap: '3' })}>
+              {members.map((member) => {
+                const players = memberPlayers[member.userId] || []
+                return (
+                  <div
+                    key={member.id}
+                    className={css({
+                      display: 'flex',
+                      flexDirection: 'column',
+                      gap: '2',
+                      p: '4',
+                      bg: 'rgba(255, 255, 255, 0.05)',
+                      border: '1px solid rgba(255, 255, 255, 0.1)',
+                      rounded: 'lg',
+                      opacity: member.isOnline ? 1 : 0.5,
+                    })}
+                  >
+                    <div
+                      className={css({
+                        display: 'flex',
+                        justifyContent: 'space-between',
+                        alignItems: 'center',
+                      })}
+                    >
+                      <div className={css({ display: 'flex', alignItems: 'center', gap: '3' })}>
+                        <div
+                          className={css({
+                            w: '3',
+                            h: '3',
+                            bg: member.isOnline ? '#10b981' : '#6b7280',
+                            rounded: 'full',
+                          })}
+                        />
+                        <span className={css({ color: 'white', fontWeight: '600' })}>
+                          {member.displayName}
+                        </span>
+                        {member.isCreator && (
+                          <span
+                            className={css({
+                              px: '2',
+                              py: '1',
+                              bg: 'rgba(251, 191, 36, 0.2)',
+                              color: '#fbbf24',
+                              rounded: 'full',
+                              fontSize: 'xs',
+                              fontWeight: '600',
+                            })}
+                          >
+                            HOST
+                          </span>
+                        )}
+                      </div>
+                      <span className={css({ color: '#a0a0ff', fontSize: 'sm' })}>
+                        {member.isOnline ? '🟢 Online' : '⚫ Offline'}
+                      </span>
+                    </div>
+                    {players.length > 0 && (
+                      <div
+                        className={css({ display: 'flex', gap: '2', flexWrap: 'wrap', ml: '6' })}
+                      >
+                        <span className={css({ color: '#a0a0ff', fontSize: 'xs', mr: '1' })}>
+                          Players:
+                        </span>
+                        {players.map((player) => (
+                          <span
+                            key={player.id}
+                            className={css({
+                              px: '2',
+                              py: '1',
+                              bg: 'rgba(59, 130, 246, 0.2)',
+                              color: '#60a5fa',
+                              border: '1px solid rgba(59, 130, 246, 0.3)',
+                              rounded: 'full',
+                              fontSize: 'xs',
+                              fontWeight: '600',
+                            })}
+                          >
+                            {player.emoji} {player.name}
+                          </span>
+                        ))}
+                      </div>
+                    )}
+                    {players.length === 0 && (
+                      <div
+                        className={css({
+                          ml: '6',
+                          color: '#6b7280',
+                          fontSize: 'xs',
+                          fontStyle: 'italic',
+                        })}
+                      >
+                        No active players
+                      </div>
+                    )}
+                  </div>
+                )
+              })}
+            </div>
+          </div>
+
+          {/* Actions */}
+          <div className={css({ display: 'flex', gap: '4' })}>
+            {isMember ? (
+              <>
+                <button
+                  onClick={leaveRoom}
+                  className={css({
+                    flex: 1,
+                    px: '6',
+                    py: '4',
+                    bg: 'rgba(255, 255, 255, 0.1)',
+                    color: 'white',
+                    rounded: 'lg',
+                    fontWeight: '600',
+                    cursor: 'pointer',
+                    _hover: { bg: 'rgba(255, 255, 255, 0.15)' },
+                  })}
+                >
+                  Leave Room
+                </button>
+                <button
+                  onClick={startGame}
+                  disabled={allPlayers.length < 1}
+                  className={css({
+                    flex: 2,
+                    px: '6',
+                    py: '4',
+                    bg: allPlayers.length < 1 ? '#6b7280' : '#10b981',
+                    color: 'white',
+                    rounded: 'lg',
+                    fontSize: 'xl',
+                    fontWeight: '600',
+                    cursor: allPlayers.length < 1 ? 'not-allowed' : 'pointer',
+                    opacity: allPlayers.length < 1 ? 0.5 : 1,
+                    _hover: allPlayers.length < 1 ? {} : { bg: '#059669' },
+                  })}
+                >
+                  {allPlayers.length < 1
+                    ? 'Waiting for players...'
+                    : `🎮 Start Game (${allPlayers.length} players)`}
+                </button>
+              </>
+            ) : (
+              <>
+                <button
+                  onClick={() => router.push('/arcade-rooms')}
+                  className={css({
+                    flex: 1,
+                    px: '6',
+                    py: '4',
+                    bg: 'rgba(255, 255, 255, 0.1)',
+                    color: 'white',
+                    rounded: 'lg',
+                    fontWeight: '600',
+                    cursor: 'pointer',
+                    _hover: { bg: 'rgba(255, 255, 255, 0.15)' },
+                  })}
+                >
+                  Back to Rooms
+                </button>
+                <button
+                  onClick={joinRoom}
+                  disabled={room.isLocked}
+                  className={css({
+                    flex: 2,
+                    px: '6',
+                    py: '4',
+                    bg: room.isLocked ? '#6b7280' : '#3b82f6',
+                    color: 'white',
+                    rounded: 'lg',
+                    fontSize: 'xl',
+                    fontWeight: '600',
+                    cursor: room.isLocked ? 'not-allowed' : 'pointer',
+                    opacity: room.isLocked ? 0.5 : 1,
+                    _hover: room.isLocked ? {} : { bg: '#2563eb' },
+                  })}
+                >
+                  {room.isLocked ? '🔒 Room Locked' : 'Join Room'}
+                </button>
+              </>
+            )}
+          </div>
+        </div>
+      </div>
+    </PageWithNav>
+  )
+}

apps/web/src/app/arcade-rooms/__tests__/room-navigation.test.tsx

@@ -0,0 +1,316 @@
+import { render, screen, waitFor } from '@testing-library/react'
+import * as nextNavigation from 'next/navigation'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import * as arcadeGuard from '@/hooks/useArcadeGuard'
+import * as roomData from '@/hooks/useRoomData'
+import * as viewerId from '@/hooks/useViewerId'
+
+// Mock Next.js navigation
+vi.mock('next/navigation', () => ({
+  useRouter: vi.fn(),
+  usePathname: vi.fn(),
+  useParams: vi.fn(),
+}))
+
+// Mock hooks
+vi.mock('@/hooks/useArcadeGuard')
+vi.mock('@/hooks/useRoomData')
+vi.mock('@/hooks/useViewerId')
+vi.mock('@/hooks/useUserPlayers', () => ({
+  useUserPlayers: () => ({ data: [], isLoading: false }),
+  useCreatePlayer: () => ({ mutate: vi.fn() }),
+  useUpdatePlayer: () => ({ mutate: vi.fn() }),
+  useDeletePlayer: () => ({ mutate: vi.fn() }),
+}))
+vi.mock('@/hooks/useArcadeSocket', () => ({
+  useArcadeSocket: () => ({
+    connected: false,
+    joinSession: vi.fn(),
+    socket: null,
+    sendMove: vi.fn(),
+    exitSession: vi.fn(),
+    pingSession: vi.fn(),
+  }),
+}))
+
+// Mock styled-system
+vi.mock('../../../../styled-system/css', () => ({
+  css: () => '',
+}))
+
+// Mock components
+vi.mock('@/components/PageWithNav', () => ({
+  PageWithNav: ({ children }: { children: React.ReactNode }) => <div>{children}</div>,
+}))
+
+// Import pages after mocks
+import RoomBrowserPage from '../page'
+
+describe('Room Navigation with Active Sessions', () => {
+  const mockRouter = {
+    push: vi.fn(),
+    replace: vi.fn(),
+    back: vi.fn(),
+  }
+
+  beforeEach(() => {
+    vi.clearAllMocks()
+    vi.spyOn(nextNavigation, 'useRouter').mockReturnValue(mockRouter as any)
+    vi.spyOn(nextNavigation, 'usePathname').mockReturnValue('/arcade-rooms')
+    vi.spyOn(viewerId, 'useViewerId').mockReturnValue({
+      data: 'test-user',
+      isLoading: false,
+      isPending: false,
+      error: null,
+    } as any)
+    global.fetch = vi.fn()
+  })
+
+  describe('RoomBrowserPage', () => {
+    it('should render room browser without redirecting when user has active game session', async () => {
+      // User has an active game session
+      vi.spyOn(arcadeGuard, 'useArcadeGuard').mockReturnValue({
+        hasActiveSession: true,
+        loading: false,
+        activeSession: {
+          gameUrl: '/arcade/room',
+          currentGame: 'matching',
+        },
+      })
+
+      // User is in a room
+      vi.spyOn(roomData, 'useRoomData').mockReturnValue({
+        roomData: {
+          id: 'room-1',
+          name: 'Test Room',
+          code: 'ABC123',
+          gameName: 'matching',
+          members: [],
+          memberPlayers: {},
+        },
+        isLoading: false,
+        isInRoom: true,
+        notifyRoomOfPlayerUpdate: vi.fn(),
+      })
+
+      // Mock rooms API
+      ;(global.fetch as any).mockResolvedValue({
+        ok: true,
+        json: async () => ({
+          rooms: [
+            {
+              id: 'room-1',
+              code: 'ABC123',
+              name: 'Test Room',
+              gameName: 'matching',
+              status: 'lobby',
+              createdAt: new Date(),
+              creatorName: 'Test User',
+              isLocked: false,
+            },
+          ],
+        }),
+      })
+
+      render(<RoomBrowserPage />)
+
+      // Should render the page
+      await waitFor(() => {
+        expect(screen.getByText('🎮 Multiplayer Rooms')).toBeInTheDocument()
+      })
+
+      // Should NOT redirect to /arcade/room
+      expect(mockRouter.push).not.toHaveBeenCalled()
+    })
+
+    it('should NOT redirect when PageWithNav uses arcade guard with enabled=false', async () => {
+      // Simulate PageWithNav calling useArcadeGuard with enabled=false
+      const arcadeGuardSpy = vi.spyOn(arcadeGuard, 'useArcadeGuard')
+
+      // User has an active game session
+      arcadeGuardSpy.mockReturnValue({
+        hasActiveSession: true,
+        loading: false,
+        activeSession: {
+          gameUrl: '/arcade/room',
+          currentGame: 'matching',
+        },
+      })
+
+      vi.spyOn(roomData, 'useRoomData').mockReturnValue({
+        roomData: null,
+        isLoading: false,
+        isInRoom: false,
+        notifyRoomOfPlayerUpdate: vi.fn(),
+      })
+
+      ;(global.fetch as any).mockResolvedValue({
+        ok: true,
+        json: async () => ({ rooms: [] }),
+      })
+
+      render(<RoomBrowserPage />)
+
+      await waitFor(() => {
+        expect(screen.getByText('🎮 Multiplayer Rooms')).toBeInTheDocument()
+      })
+
+      // PageWithNav should have called useArcadeGuard with enabled=false
+      // This is tested in PageWithNav's own tests, but we verify no redirect happened
+      expect(mockRouter.push).not.toHaveBeenCalled()
+    })
+
+    it('should allow navigation to room detail even with active session', async () => {
+      vi.spyOn(arcadeGuard, 'useArcadeGuard').mockReturnValue({
+        hasActiveSession: true,
+        loading: false,
+        activeSession: {
+          gameUrl: '/arcade/room',
+          currentGame: 'matching',
+        },
+      })
+
+      vi.spyOn(roomData, 'useRoomData').mockReturnValue({
+        roomData: null,
+        isLoading: false,
+        isInRoom: false,
+        notifyRoomOfPlayerUpdate: vi.fn(),
+      })
+
+      ;(global.fetch as any).mockResolvedValue({
+        ok: true,
+        json: async () => ({
+          rooms: [
+            {
+              id: 'room-1',
+              code: 'ABC123',
+              name: 'Test Room',
+              gameName: 'matching',
+              status: 'lobby',
+              createdAt: new Date(),
+              creatorName: 'Test User',
+              isLocked: false,
+              isMember: true,
+            },
+          ],
+        }),
+      })
+
+      render(<RoomBrowserPage />)
+
+      await waitFor(() => {
+        expect(screen.getByText('Test Room')).toBeInTheDocument()
+      })
+
+      // Click on the room card
+      const roomCard = screen.getByText('Test Room').parentElement
+      roomCard?.click()
+
+      // Should navigate to room detail, not to /arcade/room
+      await waitFor(() => {
+        expect(mockRouter.push).toHaveBeenCalledWith('/arcade-rooms/room-1')
+      })
+    })
+  })
+
+  describe('Room navigation edge cases', () => {
+    it('should handle rapid navigation between room pages without redirect loops', async () => {
+      vi.spyOn(arcadeGuard, 'useArcadeGuard').mockReturnValue({
+        hasActiveSession: true,
+        loading: false,
+        activeSession: {
+          gameUrl: '/arcade/room',
+          currentGame: 'matching',
+        },
+      })
+
+      vi.spyOn(roomData, 'useRoomData').mockReturnValue({
+        roomData: null,
+        isLoading: false,
+        isInRoom: false,
+        notifyRoomOfPlayerUpdate: vi.fn(),
+      })
+
+      ;(global.fetch as any).mockResolvedValue({
+        ok: true,
+        json: async () => ({ rooms: [] }),
+      })
+
+      const { rerender } = render(<RoomBrowserPage />)
+
+      await waitFor(() => {
+        expect(screen.getByText('🎮 Multiplayer Rooms')).toBeInTheDocument()
+      })
+
+      // Simulate pathname changes (navigating between room pages)
+      vi.spyOn(nextNavigation, 'usePathname').mockReturnValue('/arcade-rooms/room-1')
+      rerender(<RoomBrowserPage />)
+
+      vi.spyOn(nextNavigation, 'usePathname').mockReturnValue('/arcade-rooms')
+      rerender(<RoomBrowserPage />)
+
+      // Should never redirect to game page
+      expect(mockRouter.push).not.toHaveBeenCalledWith('/arcade/room')
+    })
+
+    it('should allow user to leave room and browse other rooms during active game', async () => {
+      // User is in a room with an active game
+      vi.spyOn(arcadeGuard, 'useArcadeGuard').mockReturnValue({
+        hasActiveSession: true,
+        loading: false,
+        activeSession: {
+          gameUrl: '/arcade/room',
+          currentGame: 'matching',
+        },
+      })
+
+      vi.spyOn(roomData, 'useRoomData').mockReturnValue({
+        roomData: {
+          id: 'room-1',
+          name: 'Current Room',
+          code: 'ABC123',
+          gameName: 'matching',
+          members: [],
+          memberPlayers: {},
+        },
+        isLoading: false,
+        isInRoom: true,
+        notifyRoomOfPlayerUpdate: vi.fn(),
+      })
+
+      ;(global.fetch as any).mockResolvedValue({
+        ok: true,
+        json: async () => ({
+          rooms: [
+            {
+              id: 'room-1',
+              name: 'Current Room',
+              code: 'ABC123',
+              gameName: 'matching',
+              status: 'playing',
+              isMember: true,
+            },
+            {
+              id: 'room-2',
+              name: 'Other Room',
+              code: 'DEF456',
+              gameName: 'memory-quiz',
+              status: 'lobby',
+              isMember: false,
+            },
+          ],
+        }),
+      })
+
+      render(<RoomBrowserPage />)
+
+      await waitFor(() => {
+        expect(screen.getByText('Current Room')).toBeInTheDocument()
+        expect(screen.getByText('Other Room')).toBeInTheDocument()
+      })
+
+      // Should be able to view both rooms without redirect
+      expect(mockRouter.push).not.toHaveBeenCalled()
+    })
+  })
+})

apps/web/src/app/arcade-rooms/page.tsx

@@ -0,0 +1,468 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { useRouter } from 'next/navigation'
+import { css } from '../../../styled-system/css'
+import { PageWithNav } from '@/components/PageWithNav'
+
+interface Room {
+  id: string
+  code: string
+  name: string
+  gameName: string
+  status: 'lobby' | 'playing' | 'finished'
+  createdAt: Date
+  creatorName: string
+  isLocked: boolean
+  memberCount?: number
+  playerCount?: number
+  isMember?: boolean
+}
+
+export default function RoomBrowserPage() {
+  const router = useRouter()
+  const [rooms, setRooms] = useState<Room[]>([])
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+  const [showCreateModal, setShowCreateModal] = useState(false)
+
+  useEffect(() => {
+    fetchRooms()
+  }, [])
+
+  const fetchRooms = async () => {
+    try {
+      setLoading(true)
+      const response = await fetch('/api/arcade/rooms')
+      if (!response.ok) {
+        throw new Error(`HTTP ${response.status}`)
+      }
+      const data = await response.json()
+      setRooms(data.rooms)
+      setError(null)
+    } catch (err) {
+      console.error('Failed to fetch rooms:', err)
+      setError('Failed to load rooms')
+    } finally {
+      setLoading(false)
+    }
+  }
+
+  const createRoom = async (name: string, gameName: string) => {
+    try {
+      const response = await fetch('/api/arcade/rooms', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          name,
+          gameName,
+          creatorName: 'Player',
+          gameConfig: { difficulty: 6 },
+        }),
+      })
+
+      if (!response.ok) {
+        throw new Error(`HTTP ${response.status}`)
+      }
+
+      const data = await response.json()
+      router.push(`/arcade-rooms/${data.room.id}`)
+    } catch (err) {
+      console.error('Failed to create room:', err)
+      alert('Failed to create room')
+    }
+  }
+
+  const joinRoom = async (roomId: string) => {
+    try {
+      const response = await fetch(`/api/arcade/rooms/${roomId}/join`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ displayName: 'Player' }),
+      })
+
+      if (!response.ok) {
+        const errorData = await response.json()
+
+        // Handle specific room membership conflict
+        if (errorData.code === 'ROOM_MEMBERSHIP_CONFLICT') {
+          alert(errorData.userMessage || errorData.message)
+          // Refresh the page to update room list state
+          await fetchRooms()
+          return
+        }
+
+        throw new Error(errorData.error || `HTTP ${response.status}`)
+      }
+
+      const data = await response.json()
+
+      // Show notification if user was auto-removed from other rooms
+      if (data.autoLeave) {
+        console.log(`[Room Join] ${data.autoLeave.message}`)
+        // Could show a toast notification here in the future
+      }
+
+      router.push(`/arcade-rooms/${roomId}`)
+    } catch (err) {
+      console.error('Failed to join room:', err)
+      alert('Failed to join room')
+    }
+  }
+
+  return (
+    <PageWithNav>
+      <div
+        className={css({
+          minH: 'calc(100vh - 80px)',
+          bg: 'linear-gradient(135deg, #0f0f23 0%, #1a1a3a 50%, #2d1b69 100%)',
+          p: '8',
+        })}
+      >
+        <div className={css({ maxW: '1200px', mx: 'auto' })}>
+          {/* Header */}
+          <div className={css({ mb: '8', textAlign: 'center' })}>
+            <h1
+              className={css({
+                fontSize: '4xl',
+                fontWeight: 'bold',
+                color: 'white',
+                mb: '4',
+              })}
+            >
+              🎮 Multiplayer Rooms
+            </h1>
+            <p className={css({ color: '#a0a0ff', fontSize: 'lg', mb: '6' })}>
+              Join a room or create your own to play with friends
+            </p>
+            <button
+              onClick={() => setShowCreateModal(true)}
+              className={css({
+                px: '6',
+                py: '3',
+                bg: '#10b981',
+                color: 'white',
+                rounded: 'lg',
+                fontSize: 'lg',
+                fontWeight: '600',
+                cursor: 'pointer',
+                _hover: { bg: '#059669' },
+                transition: 'all 0.2s',
+              })}
+            >
+              + Create New Room
+            </button>
+          </div>
+
+          {/* Room List */}
+          {loading && (
+            <div className={css({ textAlign: 'center', color: 'white', py: '12' })}>
+              Loading rooms...
+            </div>
+          )}
+
+          {error && (
+            <div
+              className={css({
+                bg: '#fef2f2',
+                border: '1px solid #fecaca',
+                color: '#991b1b',
+                p: '4',
+                rounded: 'lg',
+                textAlign: 'center',
+              })}
+            >
+              {error}
+            </div>
+          )}
+
+          {!loading && !error && rooms.length === 0 && (
+            <div
+              className={css({
+                bg: 'rgba(255, 255, 255, 0.05)',
+                backdropFilter: 'blur(10px)',
+                border: '1px solid rgba(255, 255, 255, 0.1)',
+                rounded: 'lg',
+                p: '12',
+                textAlign: 'center',
+                color: 'white',
+              })}
+            >
+              <p className={css({ fontSize: 'xl', mb: '2' })}>No rooms available</p>
+              <p className={css({ color: '#a0a0ff' })}>Be the first to create one!</p>
+            </div>
+          )}
+
+          {!loading && !error && rooms.length > 0 && (
+            <div className={css({ display: 'grid', gap: '4' })}>
+              {rooms.map((room) => (
+                <div
+                  key={room.id}
+                  className={css({
+                    bg: 'rgba(255, 255, 255, 0.05)',
+                    backdropFilter: 'blur(10px)',
+                    border: '1px solid rgba(255, 255, 255, 0.1)',
+                    rounded: 'lg',
+                    p: '6',
+                    transition: 'all 0.2s',
+                    _hover: {
+                      bg: 'rgba(255, 255, 255, 0.08)',
+                      borderColor: 'rgba(255, 255, 255, 0.2)',
+                    },
+                  })}
+                >
+                  <div
+                    className={css({
+                      display: 'flex',
+                      justifyContent: 'space-between',
+                      alignItems: 'center',
+                    })}
+                  >
+                    <div
+                      onClick={() => router.push(`/arcade-rooms/${room.id}`)}
+                      className={css({ flex: 1, cursor: 'pointer' })}
+                    >
+                      <div
+                        className={css({
+                          display: 'flex',
+                          alignItems: 'center',
+                          gap: '3',
+                          mb: '2',
+                        })}
+                      >
+                        <h3
+                          className={css({ fontSize: '2xl', fontWeight: 'bold', color: 'white' })}
+                        >
+                          {room.name}
+                        </h3>
+                        <span
+                          className={css({
+                            px: '3',
+                            py: '1',
+                            bg: 'rgba(255, 255, 255, 0.1)',
+                            color: '#fbbf24',
+                            rounded: 'full',
+                            fontSize: 'sm',
+                            fontWeight: '600',
+                            fontFamily: 'monospace',
+                          })}
+                        >
+                          {room.code}
+                        </span>
+                        {room.isLocked && (
+                          <span className={css({ color: '#f87171', fontSize: 'sm' })}>
+                            🔒 Locked
+                          </span>
+                        )}
+                      </div>
+                      <div
+                        className={css({
+                          display: 'flex',
+                          gap: '4',
+                          color: '#a0a0ff',
+                          fontSize: 'sm',
+                          flexWrap: 'wrap',
+                        })}
+                      >
+                        <span>👤 Host: {room.creatorName}</span>
+                        <span>🎮 {room.gameName}</span>
+                        {room.memberCount !== undefined && (
+                          <span>
+                            👥 {room.memberCount} member{room.memberCount !== 1 ? 's' : ''}
+                          </span>
+                        )}
+                        {room.playerCount !== undefined && room.playerCount > 0 && (
+                          <span>
+                            🎯 {room.playerCount} player{room.playerCount !== 1 ? 's' : ''}
+                          </span>
+                        )}
+                        <span
+                          className={css({
+                            color:
+                              room.status === 'lobby'
+                                ? '#10b981'
+                                : room.status === 'playing'
+                                  ? '#fbbf24'
+                                  : '#6b7280',
+                          })}
+                        >
+                          {room.status === 'lobby'
+                            ? '⏳ Waiting'
+                            : room.status === 'playing'
+                              ? '🎮 Playing'
+                              : '✓ Finished'}
+                        </span>
+                      </div>
+                    </div>
+                    {room.isMember ? (
+                      <div
+                        className={css({
+                          px: '6',
+                          py: '3',
+                          bg: '#10b981',
+                          color: 'white',
+                          rounded: 'lg',
+                          fontWeight: '600',
+                          display: 'flex',
+                          alignItems: 'center',
+                          gap: '2',
+                        })}
+                      >
+                        ✓ Joined
+                      </div>
+                    ) : (
+                      <button
+                        onClick={(e) => {
+                          e.stopPropagation()
+                          joinRoom(room.id)
+                        }}
+                        disabled={room.isLocked}
+                        className={css({
+                          px: '6',
+                          py: '3',
+                          bg: room.isLocked ? '#6b7280' : '#3b82f6',
+                          color: 'white',
+                          rounded: 'lg',
+                          fontWeight: '600',
+                          cursor: room.isLocked ? 'not-allowed' : 'pointer',
+                          opacity: room.isLocked ? 0.5 : 1,
+                          _hover: room.isLocked ? {} : { bg: '#2563eb' },
+                          transition: 'all 0.2s',
+                        })}
+                      >
+                        Join Room
+                      </button>
+                    )}
+                  </div>
+                </div>
+              ))}
+            </div>
+          )}
+        </div>
+
+        {/* Create Room Modal */}
+        {showCreateModal && (
+          <div
+            className={css({
+              position: 'fixed',
+              top: 0,
+              left: 0,
+              right: 0,
+              bottom: 0,
+              bg: 'rgba(0, 0, 0, 0.7)',
+              backdropFilter: 'blur(4px)',
+              display: 'flex',
+              alignItems: 'center',
+              justifyContent: 'center',
+              zIndex: 50,
+            })}
+            onClick={() => setShowCreateModal(false)}
+          >
+            <div
+              className={css({
+                bg: 'white',
+                rounded: 'xl',
+                p: '8',
+                maxW: '500px',
+                w: 'full',
+                mx: '4',
+              })}
+              onClick={(e) => e.stopPropagation()}
+            >
+              <h2 className={css({ fontSize: '2xl', fontWeight: 'bold', mb: '6' })}>
+                Create New Room
+              </h2>
+              <form
+                onSubmit={(e) => {
+                  e.preventDefault()
+                  const formData = new FormData(e.currentTarget)
+                  const name = formData.get('name') as string
+                  const gameName = formData.get('gameName') as string
+                  if (name && gameName) {
+                    createRoom(name, gameName)
+                  }
+                }}
+              >
+                <div className={css({ mb: '4' })}>
+                  <label className={css({ display: 'block', mb: '2', fontWeight: '600' })}>
+                    Room Name
+                  </label>
+                  <input
+                    name="name"
+                    type="text"
+                    required
+                    placeholder="My Awesome Room"
+                    className={css({
+                      w: 'full',
+                      px: '4',
+                      py: '3',
+                      border: '1px solid #d1d5db',
+                      rounded: 'lg',
+                      _focus: { outline: 'none', borderColor: '#3b82f6' },
+                    })}
+                  />
+                </div>
+                <div className={css({ mb: '6' })}>
+                  <label className={css({ display: 'block', mb: '2', fontWeight: '600' })}>
+                    Game
+                  </label>
+                  <select
+                    name="gameName"
+                    required
+                    className={css({
+                      w: 'full',
+                      px: '4',
+                      py: '3',
+                      border: '1px solid #d1d5db',
+                      rounded: 'lg',
+                      _focus: { outline: 'none', borderColor: '#3b82f6' },
+                    })}
+                  >
+                    <option value="matching">Memory Matching</option>
+                    <option value="memory-quiz">Memory Quiz</option>
+                    <option value="complement-race">Complement Race</option>
+                  </select>
+                </div>
+                <div className={css({ display: 'flex', gap: '3' })}>
+                  <button
+                    type="button"
+                    onClick={() => setShowCreateModal(false)}
+                    className={css({
+                      flex: 1,
+                      px: '6',
+                      py: '3',
+                      bg: '#e5e7eb',
+                      color: '#374151',
+                      rounded: 'lg',
+                      fontWeight: '600',
+                      cursor: 'pointer',
+                      _hover: { bg: '#d1d5db' },
+                    })}
+                  >
+                    Cancel
+                  </button>
+                  <button
+                    type="submit"
+                    className={css({
+                      flex: 1,
+                      px: '6',
+                      py: '3',
+                      bg: '#10b981',
+                      color: 'white',
+                      rounded: 'lg',
+                      fontWeight: '600',
+                      cursor: 'pointer',
+                      _hover: { bg: '#059669' },
+                    })}
+                  >
+                    Create Room
+                  </button>
+                </div>
+              </form>
+            </div>
+          </div>
+        )}
+      </div>
+    </PageWithNav>
+  )
+}

apps/web/src/app/arcade/complement-race/components/AISystem/SpeechBubble.tsx

@@ -0,0 +1,62 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+
+interface SpeechBubbleProps {
+  message: string
+  onHide: () => void
+}
+
+export function SpeechBubble({ message, onHide }: SpeechBubbleProps) {
+  const [isVisible, setIsVisible] = useState(true)
+
+  useEffect(() => {
+    // Auto-hide after 3.5s (line 11749-11752)
+    const timer = setTimeout(() => {
+      setIsVisible(false)
+      setTimeout(onHide, 300) // Wait for fade-out animation
+    }, 3500)
+
+    return () => clearTimeout(timer)
+  }, [onHide])
+
+  return (
+    <div
+      style={{
+        position: 'absolute',
+        bottom: 'calc(100% + 10px)',
+        left: '50%',
+        transform: 'translateX(-50%)',
+        background: 'white',
+        borderRadius: '15px',
+        padding: '10px 15px',
+        boxShadow: '0 4px 12px rgba(0,0,0,0.2)',
+        fontSize: '14px',
+        whiteSpace: 'nowrap',
+        opacity: isVisible ? 1 : 0,
+        transition: 'opacity 0.3s ease',
+        zIndex: 10,
+        pointerEvents: 'none',
+        maxWidth: '250px',
+        textAlign: 'center',
+      }}
+    >
+      {message}
+      {/* Tail pointing down */}
+      <div
+        style={{
+          position: 'absolute',
+          bottom: '-8px',
+          left: '50%',
+          transform: 'translateX(-50%)',
+          width: 0,
+          height: 0,
+          borderLeft: '8px solid transparent',
+          borderRight: '8px solid transparent',
+          borderTop: '8px solid white',
+          filter: 'drop-shadow(0 2px 2px rgba(0,0,0,0.1))',
+        }}
+      />
+    </div>
+  )
+}

apps/web/src/app/arcade/complement-race/components/AISystem/aiCommentary.ts

@@ -0,0 +1,154 @@
+import type { AIRacer } from '../../lib/gameTypes'
+
+export type CommentaryContext =
+  | 'ahead'
+  | 'behind'
+  | 'adaptive_struggle'
+  | 'adaptive_mastery'
+  | 'player_passed'
+  | 'ai_passed'
+  | 'lapped'
+  | 'desperate_catchup'
+
+// Swift AI - Competitive personality (lines 11768-11834)
+export const swiftAICommentary: Record<CommentaryContext, string[]> = {
+  ahead: [
+    '💨 Eat my dust!',
+    '🔥 Too slow for me!',
+    "⚡ You can't catch me!",
+    "🚀 I'm built for speed!",
+    '🏃‍♂️ This is way too easy!',
+  ],
+  behind: [
+    '😤 Not over yet!',
+    "💪 I'm just getting started!",
+    '🔥 Watch me catch up to you!',
+    "⚡ I'm coming for you!",
+    '🏃‍♂️ This is my comeback!',
+  ],
+  adaptive_struggle: [
+    '😏 You struggling much?',
+    '🤖 Math is easy for me!',
+    '⚡ You need to think faster!',
+    '🔥 Need me to slow down?',
+  ],
+  adaptive_mastery: [
+    "😮 You're actually impressive!",
+    "🤔 You're getting faster...",
+    '😤 Time for me to step it up!',
+    '⚡ Not bad for a human!',
+  ],
+  player_passed: [
+    '😠 No way you just passed me!',
+    "🔥 This isn't over!",
+    "💨 I'm just getting warmed up!",
+    "😤 Your lucky streak won't last!",
+    "⚡ I'll be back in front of you soon!",
+  ],
+  ai_passed: [
+    '💨 See ya later, slowpoke!',
+    '😎 Thanks for the warm-up!',
+    "🔥 This is how it's done!",
+    "⚡ I'll see you at the finish line!",
+    '💪 Try to keep up with me!',
+  ],
+  lapped: [
+    '😡 You just lapped me?! No way!',
+    '🤬 This is embarrassing for me!',
+    "😤 I'm not going down without a fight!",
+    '💢 How did you get so far ahead?!',
+    '🔥 Time to show you my real speed!',
+    "😠 You won't stay ahead for long!",
+  ],
+  desperate_catchup: [
+    "🚨 TURBO MODE ACTIVATED! I'm coming for you!",
+    '💥 You forced me to unleash my true power!',
+    '🔥 NO MORE MR. NICE AI! Time to go all out!',
+    "⚡ I'm switching to MAXIMUM OVERDRIVE!",
+    "😤 You made me angry - now you'll see what I can do!",
+    "🚀 AFTERBURNERS ENGAGED! This isn't over!",
+  ],
+}
+
+// Math Bot - Analytical personality (lines 11835-11901)
+export const mathBotCommentary: Record<CommentaryContext, string[]> = {
+  ahead: [
+    '📊 My performance is optimal!',
+    '🤖 My logic beats your speed!',
+    '📈 I have 87% win probability!',
+    "⚙️ I'm perfectly calibrated!",
+    '🔬 Science prevails over you!',
+  ],
+  behind: [
+    '🤔 Recalculating my strategy...',
+    "📊 You're exceeding my projections!",
+    '⚙️ Adjusting my parameters!',
+    "🔬 I'm analyzing your technique!",
+    "📈 You're a statistical anomaly!",
+  ],
+  adaptive_struggle: [
+    '📊 I detect inefficiencies in you!',
+    '🔬 You should focus on patterns!',
+    '⚙️ Use that extra time wisely!',
+    '📈 You have room for improvement!',
+  ],
+  adaptive_mastery: [
+    '🤖 Your optimization is excellent!',
+    '📊 Your metrics are impressive!',
+    "⚙️ I'm updating my models because of you!",
+    '🔬 You have near-AI efficiency!',
+  ],
+  player_passed: [
+    '🤖 Your strategy is fascinating!',
+    "📊 You're an unexpected variable!",
+    "⚙️ I'm adjusting my algorithms...",
+    '🔬 Your execution is impressive!',
+    "📈 I'm recalculating the odds!",
+  ],
+  ai_passed: [
+    '🤖 My efficiency is optimized!',
+    '📊 Just as I calculated!',
+    '⚙️ All my systems nominal!',
+    '🔬 My logic prevails over you!',
+    "📈 I'm at 96% confidence level!",
+  ],
+  lapped: [
+    '🤖 Error: You have exceeded my projections!',
+    '📊 This outcome has 0.3% probability!',
+    '⚙️ I need to recalibrate my systems!',
+    '🔬 Your performance is... statistically improbable!',
+    '📈 My confidence level just dropped to 12%!',
+    '🤔 I must analyze your methodology!',
+  ],
+  desperate_catchup: [
+    '🤖 EMERGENCY PROTOCOL ACTIVATED! Initiating maximum speed!',
+    '🚨 CRITICAL GAP DETECTED! Engaging catchup algorithms!',
+    '⚙️ OVERCLOCKING MY PROCESSORS! Prepare for rapid acceleration!',
+    '📊 PROBABILITY OF FAILURE: UNACCEPTABLE! Switching to turbo mode!',
+    "🔬 HYPOTHESIS: You're about to see my true potential!",
+    '📈 CONFIDENCE LEVEL: RISING! My comeback protocol is online!',
+  ],
+}
+
+// Get AI commentary message (lines 11636-11657)
+export function getAICommentary(
+  racer: AIRacer,
+  context: CommentaryContext,
+  _playerProgress: number,
+  _aiProgress: number
+): string | null {
+  // Check cooldown (line 11759-11761)
+  const now = Date.now()
+  if (now - racer.lastComment < racer.commentCooldown) {
+    return null
+  }
+
+  // Select message set based on personality and context
+  const messages =
+    racer.personality === 'competitive' ? swiftAICommentary[context] : mathBotCommentary[context]
+
+  if (!messages || messages.length === 0) return null
+
+  // Return random message
+  return messages[Math.floor(Math.random() * messages.length)]
+}

apps/web/src/app/arcade/complement-race/components/AbacusTarget.tsx

@@ -0,0 +1,36 @@
+'use client'
+
+import { AbacusReact } from '@soroban/abacus-react'
+
+interface AbacusTargetProps {
+  number: number // The complement number to display
+}
+
+/**
+ * Displays a small abacus showing a complement number inline in the equation
+ * Used to help learners recognize the abacus representation of complement numbers
+ */
+export function AbacusTarget({ number }: AbacusTargetProps) {
+  return (
+    <div
+      style={{
+        display: 'inline-flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        lineHeight: 0,
+      }}
+    >
+      <AbacusReact
+        value={number}
+        columns={1}
+        interactive={false}
+        showNumbers={false}
+        hideInactiveBeads={true}
+        scaleFactor={0.72}
+        customStyles={{
+          columnPosts: { opacity: 0 },
+        }}
+      />
+    </div>
+  )
+}

apps/web/src/app/arcade/complement-race/components/ComplementRaceGame.tsx

@@ -0,0 +1,373 @@
+'use client'
+
+import { useComplementRace } from '../context/ComplementRaceContext'
+import { GameControls } from './GameControls'
+import { GameCountdown } from './GameCountdown'
+import { GameDisplay } from './GameDisplay'
+import { GameIntro } from './GameIntro'
+import { GameResults } from './GameResults'
+
+export function ComplementRaceGame() {
+  const { state } = useComplementRace()
+
+  return (
+    <div
+      data-component="game-page-root"
+      style={{
+        flex: 1,
+        display: 'flex',
+        flexDirection: 'column',
+        overflow: 'hidden',
+        padding: '20px 8px',
+        minHeight: '100vh',
+        maxHeight: '100vh',
+        background:
+          state.style === 'sprint'
+            ? 'linear-gradient(to bottom, #2563eb 0%, #60a5fa 100%)'
+            : 'radial-gradient(ellipse at center, #8db978 0%, #7ba565 40%, #6a9354 100%)',
+        position: 'relative',
+      }}
+    >
+      {/* Background pattern - subtle grass texture */}
+      {state.style !== 'sprint' && (
+        <div
+          style={{
+            position: 'absolute',
+            inset: 0,
+            overflow: 'hidden',
+            pointerEvents: 'none',
+            zIndex: 0,
+            opacity: 0.15,
+          }}
+        >
+          <svg width="100%" height="100%">
+            <defs>
+              <pattern
+                id="grass-texture"
+                x="0"
+                y="0"
+                width="40"
+                height="40"
+                patternUnits="userSpaceOnUse"
+              >
+                <rect width="40" height="40" fill="transparent" />
+                <line x1="2" y1="5" x2="8" y2="5" stroke="#2d5016" strokeWidth="1" opacity="0.3" />
+                <line
+                  x1="15"
+                  y1="8"
+                  x2="20"
+                  y2="8"
+                  stroke="#2d5016"
+                  strokeWidth="1"
+                  opacity="0.25"
+                />
+                <line
+                  x1="25"
+                  y1="12"
+                  x2="32"
+                  y2="12"
+                  stroke="#2d5016"
+                  strokeWidth="1"
+                  opacity="0.2"
+                />
+                <line
+                  x1="5"
+                  y1="18"
+                  x2="12"
+                  y2="18"
+                  stroke="#2d5016"
+                  strokeWidth="1"
+                  opacity="0.3"
+                />
+                <line
+                  x1="28"
+                  y1="22"
+                  x2="35"
+                  y2="22"
+                  stroke="#2d5016"
+                  strokeWidth="1"
+                  opacity="0.25"
+                />
+                <line
+                  x1="10"
+                  y1="30"
+                  x2="16"
+                  y2="30"
+                  stroke="#2d5016"
+                  strokeWidth="1"
+                  opacity="0.2"
+                />
+                <line
+                  x1="22"
+                  y1="35"
+                  x2="28"
+                  y2="35"
+                  stroke="#2d5016"
+                  strokeWidth="1"
+                  opacity="0.3"
+                />
+              </pattern>
+            </defs>
+            <rect width="100%" height="100%" fill="url(#grass-texture)" />
+          </svg>
+        </div>
+      )}
+
+      {/* Subtle tree clusters around edges - top-down view with gentle sway */}
+      {state.style !== 'sprint' && (
+        <div
+          style={{
+            position: 'absolute',
+            inset: 0,
+            overflow: 'hidden',
+            pointerEvents: 'none',
+            zIndex: 0,
+          }}
+        >
+          {/* Top-left tree cluster */}
+          <div
+            style={{
+              position: 'absolute',
+              top: '5%',
+              left: '3%',
+              width: '80px',
+              height: '80px',
+              borderRadius: '50%',
+              background: 'radial-gradient(circle, #4a7c3a 0%, #3d6630 60%, transparent 70%)',
+              opacity: 0.2,
+              filter: 'blur(4px)',
+              animation: 'treeSway1 8s ease-in-out infinite',
+            }}
+          />
+
+          {/* Top-right tree cluster */}
+          <div
+            style={{
+              position: 'absolute',
+              top: '8%',
+              right: '5%',
+              width: '100px',
+              height: '100px',
+              borderRadius: '50%',
+              background: 'radial-gradient(circle, #4a7c3a 0%, #3d6630 60%, transparent 70%)',
+              opacity: 0.18,
+              filter: 'blur(5px)',
+              animation: 'treeSway2 10s ease-in-out infinite',
+            }}
+          />
+
+          {/* Bottom-left tree cluster */}
+          <div
+            style={{
+              position: 'absolute',
+              bottom: '10%',
+              left: '8%',
+              width: '90px',
+              height: '90px',
+              borderRadius: '50%',
+              background: 'radial-gradient(circle, #4a7c3a 0%, #3d6630 60%, transparent 70%)',
+              opacity: 0.15,
+              filter: 'blur(4px)',
+              animation: 'treeSway1 9s ease-in-out infinite reverse',
+            }}
+          />
+
+          {/* Bottom-right tree cluster */}
+          <div
+            style={{
+              position: 'absolute',
+              bottom: '5%',
+              right: '4%',
+              width: '110px',
+              height: '110px',
+              borderRadius: '50%',
+              background: 'radial-gradient(circle, #4a7c3a 0%, #3d6630 60%, transparent 70%)',
+              opacity: 0.2,
+              filter: 'blur(6px)',
+              animation: 'treeSway2 11s ease-in-out infinite',
+            }}
+          />
+
+          {/* Additional smaller clusters for depth */}
+          <div
+            style={{
+              position: 'absolute',
+              top: '40%',
+              left: '2%',
+              width: '60px',
+              height: '60px',
+              borderRadius: '50%',
+              background: 'radial-gradient(circle, #4a7c3a 0%, #3d6630 60%, transparent 70%)',
+              opacity: 0.12,
+              filter: 'blur(3px)',
+              animation: 'treeSway1 7s ease-in-out infinite',
+            }}
+          />
+
+          <div
+            style={{
+              position: 'absolute',
+              top: '55%',
+              right: '3%',
+              width: '70px',
+              height: '70px',
+              borderRadius: '50%',
+              background: 'radial-gradient(circle, #4a7c3a 0%, #3d6630 60%, transparent 70%)',
+              opacity: 0.14,
+              filter: 'blur(4px)',
+              animation: 'treeSway2 8.5s ease-in-out infinite reverse',
+            }}
+          />
+        </div>
+      )}
+
+      {/* Flying bird shadows - very subtle from aerial view */}
+      {state.style !== 'sprint' && (
+        <div
+          style={{
+            position: 'absolute',
+            inset: 0,
+            overflow: 'hidden',
+            pointerEvents: 'none',
+            zIndex: 0,
+          }}
+        >
+          <div
+            style={{
+              position: 'absolute',
+              top: '30%',
+              left: '-5%',
+              width: '15px',
+              height: '8px',
+              background: 'rgba(0, 0, 0, 0.08)',
+              borderRadius: '50%',
+              filter: 'blur(2px)',
+              animation: 'birdFly1 20s linear infinite',
+            }}
+          />
+
+          <div
+            style={{
+              position: 'absolute',
+              top: '60%',
+              left: '-5%',
+              width: '12px',
+              height: '6px',
+              background: 'rgba(0, 0, 0, 0.06)',
+              borderRadius: '50%',
+              filter: 'blur(2px)',
+              animation: 'birdFly2 28s linear infinite',
+            }}
+          />
+
+          <div
+            style={{
+              position: 'absolute',
+              top: '45%',
+              left: '-5%',
+              width: '10px',
+              height: '5px',
+              background: 'rgba(0, 0, 0, 0.05)',
+              borderRadius: '50%',
+              filter: 'blur(1px)',
+              animation: 'birdFly1 35s linear infinite',
+              animationDelay: '-12s',
+            }}
+          />
+        </div>
+      )}
+
+      {/* Subtle cloud shadows moving across field */}
+      {state.style !== 'sprint' && (
+        <div
+          style={{
+            position: 'absolute',
+            inset: 0,
+            overflow: 'hidden',
+            pointerEvents: 'none',
+            zIndex: 0,
+          }}
+        >
+          <div
+            style={{
+              position: 'absolute',
+              top: '-10%',
+              left: '-20%',
+              width: '300px',
+              height: '200px',
+              background: 'radial-gradient(ellipse, rgba(0, 0, 0, 0.03) 0%, transparent 60%)',
+              borderRadius: '50%',
+              filter: 'blur(20px)',
+              animation: 'cloudShadow1 45s linear infinite',
+            }}
+          />
+
+          <div
+            style={{
+              position: 'absolute',
+              top: '-10%',
+              left: '-20%',
+              width: '250px',
+              height: '180px',
+              background: 'radial-gradient(ellipse, rgba(0, 0, 0, 0.025) 0%, transparent 60%)',
+              borderRadius: '50%',
+              filter: 'blur(25px)',
+              animation: 'cloudShadow2 60s linear infinite',
+              animationDelay: '-20s',
+            }}
+          />
+        </div>
+      )}
+
+      {/* CSS animations */}
+      <style>{`
+        @keyframes treeSway1 {
+          0%, 100% { transform: scale(1) translate(0, 0); }
+          25% { transform: scale(1.02) translate(2px, -1px); }
+          50% { transform: scale(0.98) translate(-1px, 1px); }
+          75% { transform: scale(1.01) translate(-2px, -1px); }
+        }
+        @keyframes treeSway2 {
+          0%, 100% { transform: scale(1) translate(0, 0); }
+          30% { transform: scale(1.015) translate(-2px, 1px); }
+          60% { transform: scale(0.985) translate(2px, -1px); }
+          80% { transform: scale(1.01) translate(1px, 1px); }
+        }
+        @keyframes birdFly1 {
+          0% { transform: translate(0, 0); }
+          100% { transform: translate(calc(100vw + 100px), -20vh); }
+        }
+        @keyframes birdFly2 {
+          0% { transform: translate(0, 0); }
+          100% { transform: translate(calc(100vw + 100px), 15vh); }
+        }
+        @keyframes cloudShadow1 {
+          0% { transform: translate(0, 0); }
+          100% { transform: translate(calc(100vw + 400px), 30vh); }
+        }
+        @keyframes cloudShadow2 {
+          0% { transform: translate(0, 0); }
+          100% { transform: translate(calc(100vw + 350px), -20vh); }
+        }
+      `}</style>
+
+      <div
+        style={{
+          maxWidth: '100%',
+          margin: '0 auto',
+          flex: 1,
+          display: 'flex',
+          flexDirection: 'column',
+          position: 'relative',
+          zIndex: 1,
+        }}
+      >
+        {state.gamePhase === 'intro' && <GameIntro />}
+        {state.gamePhase === 'controls' && <GameControls />}
+        {state.gamePhase === 'countdown' && <GameCountdown />}
+        {state.gamePhase === 'playing' && <GameDisplay />}
+        {state.gamePhase === 'results' && <GameResults />}
+      </div>
+    </div>
+  )
+}

apps/web/src/app/arcade/complement-race/components/GameControls.tsx

@@ -0,0 +1,475 @@
+'use client'
+
+import { useComplementRace } from '../context/ComplementRaceContext'
+import type { ComplementDisplay, GameMode, GameStyle, TimeoutSetting } from '../lib/gameTypes'
+import { AbacusTarget } from './AbacusTarget'
+
+export function GameControls() {
+  const { state, dispatch } = useComplementRace()
+
+  const handleModeSelect = (mode: GameMode) => {
+    dispatch({ type: 'SET_MODE', mode })
+  }
+
+  const handleStyleSelect = (style: GameStyle) => {
+    dispatch({ type: 'SET_STYLE', style })
+    // Start the game immediately - no navigation needed
+    if (style === 'sprint') {
+      dispatch({ type: 'BEGIN_GAME' })
+    } else {
+      dispatch({ type: 'START_COUNTDOWN' })
+    }
+  }
+
+  const handleTimeoutSelect = (timeout: TimeoutSetting) => {
+    dispatch({ type: 'SET_TIMEOUT', timeout })
+  }
+
+  return (
+    <div
+      style={{
+        height: '100vh',
+        display: 'flex',
+        flexDirection: 'column',
+        background: 'linear-gradient(to bottom, #0f172a 0%, #1e293b 50%, #334155 100%)',
+        overflow: 'hidden',
+        position: 'relative',
+      }}
+    >
+      {/* Animated background pattern */}
+      <div
+        style={{
+          position: 'absolute',
+          top: 0,
+          left: 0,
+          right: 0,
+          bottom: 0,
+          backgroundImage:
+            'radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%), radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%)',
+          pointerEvents: 'none',
+        }}
+      />
+
+      {/* Header */}
+      <div
+        style={{
+          textAlign: 'center',
+          padding: '20px',
+          position: 'relative',
+          zIndex: 1,
+        }}
+      >
+        <h1
+          style={{
+            fontSize: '32px',
+            fontWeight: 'bold',
+            background: 'linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%)',
+            WebkitBackgroundClip: 'text',
+            WebkitTextFillColor: 'transparent',
+            backgroundClip: 'text',
+            margin: 0,
+            letterSpacing: '-0.5px',
+          }}
+        >
+          Complement Race
+        </h1>
+      </div>
+
+      {/* Settings Bar */}
+      <div
+        style={{
+          padding: '0 20px 16px',
+          display: 'flex',
+          flexDirection: 'column',
+          gap: '12px',
+          position: 'relative',
+          zIndex: 1,
+        }}
+      >
+        {/* Number Mode & Display */}
+        <div
+          style={{
+            background: 'rgba(30, 41, 59, 0.8)',
+            backdropFilter: 'blur(20px)',
+            borderRadius: '16px',
+            padding: '16px',
+            border: '1px solid rgba(148, 163, 184, 0.2)',
+          }}
+        >
+          <div
+            style={{
+              display: 'flex',
+              gap: '20px',
+              flexWrap: 'wrap',
+              alignItems: 'center',
+            }}
+          >
+            {/* Number Mode Pills */}
+            <div
+              style={{
+                display: 'flex',
+                gap: '8px',
+                alignItems: 'center',
+                flex: 1,
+                minWidth: '200px',
+              }}
+            >
+              <span
+                style={{
+                  fontSize: '13px',
+                  color: '#94a3b8',
+                  fontWeight: '600',
+                  marginRight: '4px',
+                }}
+              >
+                Mode:
+              </span>
+              {[
+                { mode: 'friends5' as GameMode, label: '5' },
+                { mode: 'friends10' as GameMode, label: '10' },
+                { mode: 'mixed' as GameMode, label: 'Mix' },
+              ].map(({ mode, label }) => (
+                <button
+                  key={mode}
+                  onClick={() => handleModeSelect(mode)}
+                  style={{
+                    padding: '8px 16px',
+                    borderRadius: '20px',
+                    border: 'none',
+                    background:
+                      state.mode === mode
+                        ? 'linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%)'
+                        : 'rgba(148, 163, 184, 0.2)',
+                    color: state.mode === mode ? 'white' : '#94a3b8',
+                    fontWeight: 'bold',
+                    cursor: 'pointer',
+                    transition: 'all 0.2s ease',
+                    fontSize: '13px',
+                  }}
+                >
+                  {label}
+                </button>
+              ))}
+            </div>
+
+            {/* Complement Display Pills */}
+            <div
+              style={{
+                display: 'flex',
+                gap: '8px',
+                alignItems: 'center',
+                flex: 1,
+                minWidth: '200px',
+              }}
+            >
+              <span
+                style={{
+                  fontSize: '13px',
+                  color: '#94a3b8',
+                  fontWeight: '600',
+                  marginRight: '4px',
+                }}
+              >
+                Show:
+              </span>
+              {(['number', 'abacus', 'random'] as ComplementDisplay[]).map((displayMode) => (
+                <button
+                  key={displayMode}
+                  onClick={() => dispatch({ type: 'SET_COMPLEMENT_DISPLAY', display: displayMode })}
+                  style={{
+                    padding: '8px 16px',
+                    borderRadius: '20px',
+                    border: 'none',
+                    background:
+                      state.complementDisplay === displayMode
+                        ? 'linear-gradient(135deg, #10b981 0%, #059669 100%)'
+                        : 'rgba(148, 163, 184, 0.2)',
+                    color: state.complementDisplay === displayMode ? 'white' : '#94a3b8',
+                    fontWeight: 'bold',
+                    cursor: 'pointer',
+                    transition: 'all 0.2s ease',
+                    fontSize: '13px',
+                  }}
+                >
+                  {displayMode === 'number' ? '123' : displayMode === 'abacus' ? '🧮' : '🎲'}
+                </button>
+              ))}
+            </div>
+
+            {/* Speed Pills */}
+            <div
+              style={{
+                display: 'flex',
+                gap: '6px',
+                alignItems: 'center',
+                flex: 1,
+                minWidth: '200px',
+                flexWrap: 'wrap',
+              }}
+            >
+              <span
+                style={{
+                  fontSize: '13px',
+                  color: '#94a3b8',
+                  fontWeight: '600',
+                  marginRight: '4px',
+                }}
+              >
+                Speed:
+              </span>
+              {(
+                [
+                  'preschool',
+                  'kindergarten',
+                  'relaxed',
+                  'slow',
+                  'normal',
+                  'fast',
+                  'expert',
+                ] as TimeoutSetting[]
+              ).map((timeout) => (
+                <button
+                  key={timeout}
+                  onClick={() => handleTimeoutSelect(timeout)}
+                  style={{
+                    padding: '6px 12px',
+                    borderRadius: '16px',
+                    border: 'none',
+                    background:
+                      state.timeoutSetting === timeout
+                        ? 'linear-gradient(135deg, #ec4899 0%, #be185d 100%)'
+                        : 'rgba(148, 163, 184, 0.2)',
+                    color: state.timeoutSetting === timeout ? 'white' : '#94a3b8',
+                    fontWeight: state.timeoutSetting === timeout ? 'bold' : 'normal',
+                    cursor: 'pointer',
+                    transition: 'all 0.2s ease',
+                    fontSize: '11px',
+                  }}
+                >
+                  {timeout === 'preschool'
+                    ? 'Pre'
+                    : timeout === 'kindergarten'
+                      ? 'K'
+                      : timeout.charAt(0).toUpperCase()}
+                </button>
+              ))}
+            </div>
+          </div>
+
+          {/* Preview - compact */}
+          <div
+            style={{
+              marginTop: '12px',
+              padding: '12px',
+              borderRadius: '12px',
+              background: 'rgba(15, 23, 42, 0.6)',
+              border: '1px solid rgba(148, 163, 184, 0.2)',
+              display: 'flex',
+              alignItems: 'center',
+              justifyContent: 'center',
+              gap: '12px',
+            }}
+          >
+            <span style={{ fontSize: '11px', color: '#94a3b8', fontWeight: '600' }}>Preview:</span>
+            <div
+              style={{
+                display: 'flex',
+                alignItems: 'center',
+                gap: '10px',
+                fontSize: '20px',
+                fontWeight: 'bold',
+                color: 'white',
+              }}
+            >
+              <div
+                style={{
+                  background: 'linear-gradient(135deg, #3b82f6, #8b5cf6)',
+                  color: 'white',
+                  padding: '2px 10px',
+                  borderRadius: '6px',
+                }}
+              >
+                ?
+              </div>
+              <span style={{ fontSize: '16px', color: '#64748b' }}>+</span>
+              {state.complementDisplay === 'number' ? (
+                <span>3</span>
+              ) : state.complementDisplay === 'abacus' ? (
+                <div style={{ transform: 'scale(0.8)' }}>
+                  <AbacusTarget number={3} />
+                </div>
+              ) : (
+                <span style={{ fontSize: '14px' }}>🎲</span>
+              )}
+              <span style={{ fontSize: '16px', color: '#64748b' }}>=</span>
+              <span style={{ color: '#10b981' }}>
+                {state.mode === 'friends5' ? '5' : state.mode === 'friends10' ? '10' : '?'}
+              </span>
+            </div>
+          </div>
+        </div>
+      </div>
+
+      {/* HERO SECTION - Race Cards */}
+      <div
+        data-component="race-cards-container"
+        style={{
+          flex: 1,
+          padding: '0 20px 20px',
+          display: 'flex',
+          flexDirection: 'column',
+          gap: '16px',
+          position: 'relative',
+          zIndex: 1,
+          overflow: 'auto',
+        }}
+      >
+        {[
+          {
+            style: 'practice' as GameStyle,
+            emoji: '🏁',
+            title: 'Practice Race',
+            desc: 'Race against AI to 20 correct answers',
+            gradient: 'linear-gradient(135deg, #10b981 0%, #059669 100%)',
+            shadowColor: 'rgba(16, 185, 129, 0.5)',
+            accentColor: '#34d399',
+          },
+          {
+            style: 'sprint' as GameStyle,
+            emoji: '🚂',
+            title: 'Steam Sprint',
+            desc: 'High-speed 60-second train journey',
+            gradient: 'linear-gradient(135deg, #f59e0b 0%, #d97706 100%)',
+            shadowColor: 'rgba(245, 158, 11, 0.5)',
+            accentColor: '#fbbf24',
+          },
+          {
+            style: 'survival' as GameStyle,
+            emoji: '🔄',
+            title: 'Survival Circuit',
+            desc: 'Endless laps - beat your best time',
+            gradient: 'linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%)',
+            shadowColor: 'rgba(139, 92, 246, 0.5)',
+            accentColor: '#a78bfa',
+          },
+        ].map(({ style, emoji, title, desc, gradient, shadowColor, accentColor }) => (
+          <button
+            key={style}
+            onClick={() => handleStyleSelect(style)}
+            style={{
+              position: 'relative',
+              padding: '0',
+              border: 'none',
+              borderRadius: '24px',
+              background: gradient,
+              cursor: 'pointer',
+              transition: 'all 0.3s cubic-bezier(0.4, 0, 0.2, 1)',
+              boxShadow: `0 10px 40px ${shadowColor}, 0 0 0 1px rgba(255, 255, 255, 0.1)`,
+              transform: 'translateY(0)',
+              flex: 1,
+              minHeight: '140px',
+              overflow: 'hidden',
+            }}
+            onMouseEnter={(e) => {
+              e.currentTarget.style.transform = 'translateY(-8px) scale(1.02)'
+              e.currentTarget.style.boxShadow = `0 20px 60px ${shadowColor}, 0 0 0 2px ${accentColor}`
+            }}
+            onMouseLeave={(e) => {
+              e.currentTarget.style.transform = 'translateY(0) scale(1)'
+              e.currentTarget.style.boxShadow = `0 10px 40px ${shadowColor}, 0 0 0 1px rgba(255, 255, 255, 0.1)`
+            }}
+          >
+            {/* Shine effect overlay */}
+            <div
+              style={{
+                position: 'absolute',
+                top: 0,
+                left: 0,
+                right: 0,
+                bottom: 0,
+                background: 'linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%)',
+                pointerEvents: 'none',
+              }}
+            />
+
+            <div
+              style={{
+                padding: '28px 32px',
+                display: 'flex',
+                alignItems: 'center',
+                justifyContent: 'space-between',
+                position: 'relative',
+                zIndex: 1,
+              }}
+            >
+              <div
+                style={{
+                  display: 'flex',
+                  alignItems: 'center',
+                  gap: '20px',
+                  flex: 1,
+                }}
+              >
+                <div
+                  style={{
+                    fontSize: '64px',
+                    lineHeight: 1,
+                    filter: 'drop-shadow(0 4px 8px rgba(0,0,0,0.3))',
+                  }}
+                >
+                  {emoji}
+                </div>
+                <div style={{ textAlign: 'left', flex: 1 }}>
+                  <div
+                    style={{
+                      fontSize: '28px',
+                      fontWeight: 'bold',
+                      color: 'white',
+                      marginBottom: '6px',
+                      textShadow: '0 2px 8px rgba(0,0,0,0.3)',
+                    }}
+                  >
+                    {title}
+                  </div>
+                  <div
+                    style={{
+                      fontSize: '15px',
+                      color: 'rgba(255, 255, 255, 0.9)',
+                      textShadow: '0 1px 4px rgba(0,0,0,0.2)',
+                    }}
+                  >
+                    {desc}
+                  </div>
+                </div>
+              </div>
+
+              {/* PLAY NOW button */}
+              <div
+                style={{
+                  background: 'white',
+                  color: gradient.includes('10b981')
+                    ? '#047857'
+                    : gradient.includes('f59e0b')
+                      ? '#d97706'
+                      : '#6b21a8',
+                  padding: '16px 32px',
+                  borderRadius: '16px',
+                  fontWeight: 'bold',
+                  fontSize: '18px',
+                  boxShadow: '0 8px 24px rgba(0,0,0,0.25)',
+                  display: 'flex',
+                  alignItems: 'center',
+                  gap: '10px',
+                  whiteSpace: 'nowrap',
+                }}
+              >
+                <span>PLAY</span>
+                <span style={{ fontSize: '24px' }}>▶</span>
+              </div>
+            </div>
+          </button>
+        ))}
+      </div>
+    </div>
+  )
+}

apps/web/src/app/arcade/complement-race/components/GameCountdown.tsx

@@ -0,0 +1,104 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { useComplementRace } from '../context/ComplementRaceContext'
+import { useSoundEffects } from '../hooks/useSoundEffects'
+
+export function GameCountdown() {
+  const { dispatch } = useComplementRace()
+  const { playSound } = useSoundEffects()
+  const [count, setCount] = useState(3)
+  const [showGo, setShowGo] = useState(false)
+
+  useEffect(() => {
+    const countdownInterval = setInterval(() => {
+      setCount((prevCount) => {
+        if (prevCount > 1) {
+          // Play countdown beep (volume 0.4)
+          playSound('countdown', 0.4)
+          return prevCount - 1
+        } else if (prevCount === 1) {
+          // Show GO!
+          setShowGo(true)
+          // Play race start fanfare (volume 0.6)
+          playSound('race_start', 0.6)
+          return 0
+        }
+        return prevCount
+      })
+    }, 1000)
+
+    return () => clearInterval(countdownInterval)
+  }, [playSound])
+
+  useEffect(() => {
+    if (showGo) {
+      // Hide countdown and start game after GO animation
+      const timer = setTimeout(() => {
+        dispatch({ type: 'BEGIN_GAME' })
+      }, 1000)
+
+      return () => clearTimeout(timer)
+    }
+  }, [showGo, dispatch])
+
+  return (
+    <div
+      style={{
+        position: 'fixed',
+        top: 0,
+        left: 0,
+        right: 0,
+        bottom: 0,
+        display: 'flex',
+        flexDirection: 'column',
+        alignItems: 'center',
+        justifyContent: 'center',
+        background: 'rgba(0, 0, 0, 0.9)',
+        zIndex: 1000,
+      }}
+    >
+      <div
+        style={{
+          fontSize: showGo ? '120px' : '160px',
+          fontWeight: 'bold',
+          color: showGo ? '#10b981' : 'white',
+          textShadow: '0 4px 20px rgba(0, 0, 0, 0.5)',
+          animation: showGo ? 'scaleUp 1s ease-out' : 'pulse 0.5s ease-in-out',
+          transition: 'all 0.3s ease',
+        }}
+      >
+        {showGo ? 'GO!' : count}
+      </div>
+
+      {!showGo && (
+        <div
+          style={{
+            marginTop: '32px',
+            fontSize: '24px',
+            color: 'rgba(255, 255, 255, 0.8)',
+            fontWeight: '500',
+          }}
+        >
+          Get Ready!
+        </div>
+      )}
+
+      <style
+        dangerouslySetInnerHTML={{
+          __html: `
+          @keyframes pulse {
+            0%, 100% { transform: scale(1); opacity: 1; }
+            50% { transform: scale(1.1); opacity: 0.8; }
+          }
+          @keyframes scaleUp {
+            0% { transform: scale(0.5); opacity: 0; }
+            50% { transform: scale(1.2); opacity: 1; }
+            100% { transform: scale(1); opacity: 1; }
+          }
+        `,
+        }}
+      />
+    </div>
+  )
+}

apps/web/src/app/arcade/complement-race/components/GameDisplay.tsx

@@ -0,0 +1,409 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { useComplementRace } from '../context/ComplementRaceContext'
+import { useAdaptiveDifficulty } from '../hooks/useAdaptiveDifficulty'
+import { useAIRacers } from '../hooks/useAIRacers'
+import { useSoundEffects } from '../hooks/useSoundEffects'
+import { useSteamJourney } from '../hooks/useSteamJourney'
+import { generatePassengers } from '../lib/passengerGenerator'
+import { AbacusTarget } from './AbacusTarget'
+import { CircularTrack } from './RaceTrack/CircularTrack'
+import { LinearTrack } from './RaceTrack/LinearTrack'
+import { SteamTrainJourney } from './RaceTrack/SteamTrainJourney'
+import { RouteCelebration } from './RouteCelebration'
+
+type FeedbackAnimation = 'correct' | 'incorrect' | null
+
+export function GameDisplay() {
+  const { state, dispatch } = useComplementRace()
+  useAIRacers() // Activate AI racer updates (not used in sprint mode)
+  const { trackPerformance, getAdaptiveFeedbackMessage } = useAdaptiveDifficulty()
+  const { boostMomentum } = useSteamJourney()
+  const { playSound } = useSoundEffects()
+  const [feedbackAnimation, setFeedbackAnimation] = useState<FeedbackAnimation>(null)
+
+  // Clear feedback animation after it plays (line 1996, 2001)
+  useEffect(() => {
+    if (feedbackAnimation) {
+      const timer = setTimeout(() => {
+        setFeedbackAnimation(null)
+      }, 500) // Match animation duration
+      return () => clearTimeout(timer)
+    }
+  }, [feedbackAnimation])
+
+  // Show adaptive feedback with auto-hide
+  useEffect(() => {
+    if (state.adaptiveFeedback) {
+      const timer = setTimeout(() => {
+        dispatch({ type: 'CLEAR_ADAPTIVE_FEEDBACK' })
+      }, 3000)
+      return () => clearTimeout(timer)
+    }
+  }, [state.adaptiveFeedback, dispatch])
+
+  // Check for finish line (player reaches race goal) - only for practice mode
+  useEffect(() => {
+    if (
+      state.correctAnswers >= state.raceGoal &&
+      state.isGameActive &&
+      state.style === 'practice'
+    ) {
+      // Play celebration sound (line 14182)
+      playSound('celebration')
+      // End the game
+      dispatch({ type: 'END_RACE' })
+      // Show results after a short delay
+      setTimeout(() => {
+        dispatch({ type: 'SHOW_RESULTS' })
+      }, 1500)
+    }
+  }, [state.correctAnswers, state.raceGoal, state.isGameActive, state.style, dispatch, playSound])
+
+  // For survival mode (endless circuit), track laps but never end
+  // For sprint mode (steam sprint), end after 60 seconds (will implement later)
+
+  // Handle keyboard input
+  useEffect(() => {
+    const handleKeyPress = (e: KeyboardEvent) => {
+      // Only process number keys
+      if (/^[0-9]$/.test(e.key)) {
+        const newInput = state.currentInput + e.key
+        dispatch({ type: 'UPDATE_INPUT', input: newInput })
+
+        // Check if answer is complete
+        if (state.currentQuestion) {
+          const answer = parseInt(newInput, 10)
+          const correctAnswer = state.currentQuestion.correctAnswer
+
+          // If we have enough digits to match the answer, submit
+          if (newInput.length >= correctAnswer.toString().length) {
+            const responseTime = Date.now() - state.questionStartTime
+            const isCorrect = answer === correctAnswer
+            const pairKey = `${state.currentQuestion.number}_${state.currentQuestion.correctAnswer}_${state.currentQuestion.targetSum}`
+
+            if (isCorrect) {
+              // Correct answer
+              dispatch({ type: 'SUBMIT_ANSWER', answer })
+              trackPerformance(true, responseTime)
+
+              // Trigger correct answer animation (line 1996)
+              setFeedbackAnimation('correct')
+
+              // Play appropriate sound based on performance (from web_generator.py lines 11530-11542)
+              const newStreak = state.streak + 1
+              if (newStreak > 0 && newStreak % 5 === 0) {
+                // Epic streak sound for every 5th correct answer
+                playSound('streak')
+              } else if (responseTime < 800) {
+                // Whoosh sound for very fast responses (under 800ms)
+                playSound('whoosh')
+              } else if (responseTime < 1200 && state.streak >= 3) {
+                // Combo sound for rapid answers while on a streak
+                playSound('combo')
+              } else {
+                // Regular correct sound
+                playSound('correct')
+              }
+
+              // Boost momentum for sprint mode
+              if (state.style === 'sprint') {
+                boostMomentum()
+
+                // Play train whistle for milestones in sprint mode (line 13222-13235)
+                if (newStreak >= 5 && newStreak % 3 === 0) {
+                  // Major milestone - play train whistle
+                  setTimeout(() => {
+                    playSound('train_whistle', 0.4)
+                  }, 200)
+                } else if (state.momentum >= 90) {
+                  // High momentum celebration - occasional whistle
+                  if (Math.random() < 0.3) {
+                    setTimeout(() => {
+                      playSound('train_whistle', 0.25)
+                    }, 150)
+                  }
+                }
+              }
+
+              // Show adaptive feedback
+              const feedback = getAdaptiveFeedbackMessage(pairKey, true, responseTime)
+              if (feedback) {
+                dispatch({ type: 'SHOW_ADAPTIVE_FEEDBACK', feedback })
+              }
+
+              dispatch({ type: 'NEXT_QUESTION' })
+            } else {
+              // Incorrect answer
+              trackPerformance(false, responseTime)
+
+              // Trigger incorrect answer animation (line 2001)
+              setFeedbackAnimation('incorrect')
+
+              // Play incorrect sound (from web_generator.py line 11589)
+              playSound('incorrect')
+
+              // Show adaptive feedback
+              const feedback = getAdaptiveFeedbackMessage(pairKey, false, responseTime)
+              if (feedback) {
+                dispatch({ type: 'SHOW_ADAPTIVE_FEEDBACK', feedback })
+              }
+
+              dispatch({ type: 'UPDATE_INPUT', input: '' })
+            }
+          }
+        }
+      } else if (e.key === 'Backspace') {
+        dispatch({ type: 'UPDATE_INPUT', input: state.currentInput.slice(0, -1) })
+      }
+    }
+
+    window.addEventListener('keydown', handleKeyPress)
+    return () => window.removeEventListener('keydown', handleKeyPress)
+  }, [
+    state.currentInput,
+    state.currentQuestion,
+    state.questionStartTime,
+    state.style,
+    state.streak,
+    dispatch,
+    trackPerformance,
+    getAdaptiveFeedbackMessage,
+    boostMomentum,
+    playSound,
+    state.momentum,
+  ])
+
+  // Handle route celebration continue
+  const handleContinueToNextRoute = () => {
+    const nextRoute = state.currentRoute + 1
+
+    // Start new route (this also hides celebration)
+    dispatch({
+      type: 'START_NEW_ROUTE',
+      routeNumber: nextRoute,
+      stations: state.stations, // Keep same stations for now
+    })
+
+    // Generate new passengers
+    const newPassengers = generatePassengers(state.stations)
+    dispatch({ type: 'GENERATE_PASSENGERS', passengers: newPassengers })
+  }
+
+  if (!state.currentQuestion) return null
+
+  return (
+    <div
+      data-component="game-display"
+      style={{
+        flex: 1,
+        display: 'flex',
+        flexDirection: 'column',
+        width: '100%',
+      }}
+    >
+      {/* Adaptive Feedback */}
+      {state.adaptiveFeedback && (
+        <div
+          data-component="adaptive-feedback"
+          style={{
+            position: 'fixed',
+            top: '80px',
+            left: '50%',
+            transform: 'translateX(-50%)',
+            background: 'linear-gradient(135deg, #667eea 0%, #764ba2 100%)',
+            color: 'white',
+            padding: '12px 24px',
+            borderRadius: '12px',
+            boxShadow: '0 4px 20px rgba(102, 126, 234, 0.4)',
+            fontSize: '16px',
+            fontWeight: 'bold',
+            zIndex: 1000,
+            animation: 'slideDown 0.3s ease-out',
+            maxWidth: '600px',
+            textAlign: 'center',
+          }}
+        >
+          {state.adaptiveFeedback.message}
+        </div>
+      )}
+
+      {/* Stats Header - constrained width, hidden for sprint mode */}
+      {state.style !== 'sprint' && (
+        <div
+          data-component="stats-container"
+          style={{
+            maxWidth: '1200px',
+            margin: '0 auto',
+            width: '100%',
+            padding: '0 20px',
+            marginTop: '10px',
+          }}
+        >
+          <div
+            data-component="stats-header"
+            style={{
+              display: 'flex',
+              justifyContent: 'space-around',
+              marginBottom: '10px',
+              background: 'white',
+              borderRadius: '12px',
+              padding: '10px',
+              boxShadow: '0 2px 8px rgba(0, 0, 0, 0.1)',
+            }}
+          >
+            <div data-stat="score" style={{ textAlign: 'center' }}>
+              <div style={{ color: '#6b7280', fontSize: '14px', marginBottom: '4px' }}>Score</div>
+              <div style={{ fontWeight: 'bold', fontSize: '24px', color: '#3b82f6' }}>
+                {state.score}
+              </div>
+            </div>
+            <div data-stat="streak" style={{ textAlign: 'center' }}>
+              <div style={{ color: '#6b7280', fontSize: '14px', marginBottom: '4px' }}>Streak</div>
+              <div style={{ fontWeight: 'bold', fontSize: '24px', color: '#10b981' }}>
+                {state.streak} 🔥
+              </div>
+            </div>
+            <div data-stat="progress" style={{ textAlign: 'center' }}>
+              <div style={{ color: '#6b7280', fontSize: '14px', marginBottom: '4px' }}>
+                Progress
+              </div>
+              <div style={{ fontWeight: 'bold', fontSize: '24px', color: '#f59e0b' }}>
+                {state.correctAnswers}/{state.raceGoal}
+              </div>
+            </div>
+          </div>
+        </div>
+      )}
+
+      {/* Race Track - full width, break out of padding */}
+      <div
+        data-component="track-container"
+        style={{
+          width: '100vw',
+          position: 'relative',
+          left: '50%',
+          right: '50%',
+          marginLeft: '-50vw',
+          marginRight: '-50vw',
+          padding: state.style === 'sprint' ? '0' : '0 20px',
+          display: 'flex',
+          justifyContent: state.style === 'sprint' ? 'stretch' : 'center',
+          background: 'transparent',
+          flex: state.style === 'sprint' ? 1 : 'initial',
+          minHeight: state.style === 'sprint' ? 0 : 'initial',
+        }}
+      >
+        {state.style === 'survival' ? (
+          <CircularTrack
+            playerProgress={state.correctAnswers}
+            playerLap={state.playerLap}
+            aiRacers={state.aiRacers}
+            aiLaps={state.aiLaps}
+          />
+        ) : state.style === 'sprint' ? (
+          <SteamTrainJourney
+            momentum={state.momentum}
+            trainPosition={state.trainPosition}
+            pressure={state.pressure}
+            elapsedTime={state.elapsedTime}
+            currentQuestion={state.currentQuestion}
+            currentInput={state.currentInput}
+          />
+        ) : (
+          <LinearTrack
+            playerProgress={state.correctAnswers}
+            aiRacers={state.aiRacers}
+            raceGoal={state.raceGoal}
+            showFinishLine={true}
+          />
+        )}
+      </div>
+
+      {/* Question Display - only for non-sprint modes */}
+      {state.style !== 'sprint' && (
+        <div
+          data-component="question-container"
+          style={{
+            maxWidth: '1200px',
+            margin: '0 auto',
+            width: '100%',
+            padding: '0 20px',
+            display: 'flex',
+            justifyContent: 'center',
+            marginTop: '20px',
+          }}
+        >
+          <div
+            data-component="question-display"
+            style={{
+              background: 'rgba(255, 255, 255, 0.98)',
+              borderRadius: '24px',
+              padding: '28px 50px',
+              boxShadow: '0 16px 40px rgba(0, 0, 0, 0.3), 0 0 0 5px rgba(59, 130, 246, 0.4)',
+              backdropFilter: 'blur(12px)',
+              border: '4px solid rgba(255, 255, 255, 0.95)',
+            }}
+          >
+            {/* Complement equation as main focus */}
+            <div
+              data-element="question-equation"
+              style={{
+                fontSize: '96px',
+                fontWeight: 'bold',
+                color: '#1f2937',
+                lineHeight: '1.1',
+                display: 'flex',
+                alignItems: 'center',
+                gap: '20px',
+                justifyContent: 'center',
+              }}
+            >
+              <span
+                style={{
+                  background: 'linear-gradient(135deg, #3b82f6, #8b5cf6)',
+                  color: 'white',
+                  padding: '12px 32px',
+                  borderRadius: '16px',
+                  minWidth: '140px',
+                  display: 'inline-block',
+                  textShadow: '0 3px 10px rgba(0, 0, 0, 0.3)',
+                }}
+              >
+                {state.currentInput || '?'}
+              </span>
+              <span style={{ color: '#6b7280' }}>+</span>
+              {state.currentQuestion.showAsAbacus ? (
+                <div
+                  style={{
+                    transform: 'scale(2.4) translateY(8%)',
+                    transformOrigin: 'center center',
+                    display: 'flex',
+                    alignItems: 'center',
+                    justifyContent: 'center',
+                  }}
+                >
+                  <AbacusTarget number={state.currentQuestion.number} />
+                </div>
+              ) : (
+                <span>{state.currentQuestion.number}</span>
+              )}
+              <span style={{ color: '#6b7280' }}>=</span>
+              <span style={{ color: '#10b981' }}>{state.currentQuestion.targetSum}</span>
+            </div>
+          </div>
+        </div>
+      )}
+
+      {/* Route Celebration Modal */}
+      {state.showRouteCelebration && state.style === 'sprint' && (
+        <RouteCelebration
+          completedRouteNumber={state.currentRoute}
+          nextRouteNumber={state.currentRoute + 1}
+          onContinue={handleContinueToNextRoute}
+        />
+      )}
+    </div>
+  )
+}