fix(memory-quiz): fix playMode persistence by updating validator

ROOT CAUSE FOUND:
The MemoryQuizGameValidator.getInitialState() method was hardcoding
playMode to 'cooperative' and not accepting it as a config parameter.

Even though socket-server.ts was passing playMode from the saved config,
the validator's TypeScript signature didn't include it:

BEFORE:
```typescript
getInitialState(config: {
  selectedCount: number
  displayTime: number
  selectedDifficulty: DifficultyLevel
}): SorobanQuizState {
  return {
    // ...
    playMode: 'cooperative',  // ← ALWAYS HARDCODED!
  }
}
```

AFTER:
```typescript
getInitialState(config: {
  selectedCount: number
  displayTime: number
  selectedDifficulty: DifficultyLevel
  playMode?: 'cooperative' | 'competitive'  // ← NEW!
}): SorobanQuizState {
  return {
    // ...
    playMode: config.playMode || 'cooperative',  // ← USES CONFIG VALUE!
  }
}
```

Also added comprehensive debug logging throughout the flow:
- socket-server.ts: logs room.gameConfig, extracted config, and resulting playMode
- RoomMemoryQuizProvider.tsx: logs roomData.gameConfig and merged state
- MemoryQuizGameValidator.ts: logs config received and playMode returned

This will help identify any remaining persistence issues.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

apps/web/src/app/arcade/memory-quiz/context/RoomMemoryQuizProvider.tsx

@@ -210,19 +210,32 @@ export function RoomMemoryQuizProvider({ children }: { children: ReactNode }) {
   // Settings are scoped by game name to preserve settings when switching games
   const mergedInitialState = useMemo(() => {
     const gameConfig = roomData?.gameConfig as Record<string, any> | null | undefined
-    console.log('[RoomMemoryQuizProvider] Initializing - gameConfig:', gameConfig)
+    console.log(
+      '[RoomMemoryQuizProvider] Initializing - Full roomData.gameConfig:',
+      JSON.stringify(gameConfig, null, 2)
+    )
 
     if (!gameConfig) {
-      console.log('[RoomMemoryQuizProvider] No gameConfig, using initialState')
+      console.log(
+        '[RoomMemoryQuizProvider] No gameConfig, using initialState with playMode:',
+        initialState.playMode
+      )
       return initialState
     }
 
     // Get settings for this specific game (memory-quiz)
     const savedConfig = gameConfig['memory-quiz'] as Record<string, any> | null | undefined
-    console.log('[RoomMemoryQuizProvider] Loading saved config for memory-quiz:', savedConfig)
+    console.log(
+      '[RoomMemoryQuizProvider] Extracted memory-quiz config:',
+      JSON.stringify(savedConfig, null, 2)
+    )
+    console.log('[RoomMemoryQuizProvider] savedConfig.playMode value:', savedConfig?.playMode)
 
     if (!savedConfig) {
-      console.log('[RoomMemoryQuizProvider] No saved config for memory-quiz, using initialState')
+      console.log(
+        '[RoomMemoryQuizProvider] No saved config for memory-quiz, using initialState with playMode:',
+        initialState.playMode
+      )
       return initialState
     }
 
@@ -234,12 +247,20 @@ export function RoomMemoryQuizProvider({ children }: { children: ReactNode }) {
       selectedDifficulty: savedConfig.selectedDifficulty ?? initialState.selectedDifficulty,
       playMode: savedConfig.playMode ?? initialState.playMode,
     }
-    console.log('[RoomMemoryQuizProvider] Merged state:', {
-      selectedCount: merged.selectedCount,
-      displayTime: merged.displayTime,
-      selectedDifficulty: merged.selectedDifficulty,
-      playMode: merged.playMode,
-    })
+    console.log(
+      '[RoomMemoryQuizProvider] Merged state:',
+      JSON.stringify(
+        {
+          selectedCount: merged.selectedCount,
+          displayTime: merged.displayTime,
+          selectedDifficulty: merged.selectedDifficulty,
+          playMode: merged.playMode,
+        },
+        null,
+        2
+      )
+    )
+    console.log('[RoomMemoryQuizProvider] Final merged.playMode:', merged.playMode)
 
     return merged
   }, [roomData?.gameConfig])

apps/web/src/lib/arcade/validation/MemoryQuizGameValidator.ts

@@ -405,8 +405,14 @@ export class MemoryQuizGameValidator
     selectedCount: number
     displayTime: number
     selectedDifficulty: DifficultyLevel
+    playMode?: 'cooperative' | 'competitive'
   }): SorobanQuizState {
-    return {
+    console.log(
+      '[MemoryQuizValidator] getInitialState called with config:',
+      JSON.stringify(config, null, 2)
+    )
+
+    const initialState: SorobanQuizState = {
       cards: [],
       quizCards: [],
       correctAnswers: [],
@@ -422,7 +428,7 @@ export class MemoryQuizGameValidator
       activePlayers: [],
       playerMetadata: {},
       playerScores: {},
-      playMode: 'cooperative',
+      playMode: config.playMode || 'cooperative',
       numberFoundBy: {},
       // UI state
       gamePhase: 'setup',
@@ -433,6 +439,9 @@ export class MemoryQuizGameValidator
       testingMode: false,
       showOnScreenKeyboard: false,
     }
+
+    console.log('[MemoryQuizValidator] getInitialState returning playMode:', initialState.playMode)
+    return initialState
   }
 }
 

apps/web/src/socket-server.ts

@@ -94,12 +94,35 @@ export function initializeSocketServer(httpServer: HTTPServer) {
               } else if (room.gameName === 'memory-quiz') {
                 // Access nested gameConfig: { 'memory-quiz': { selectedCount, displayTime, selectedDifficulty, playMode } }
                 const memoryQuizConfig = (room.gameConfig as any)?.['memory-quiz'] || {}
-                initialState = validator.getInitialState({
+                console.log(
+                  '[join-arcade-session] memory-quiz - Full room.gameConfig:',
+                  JSON.stringify(room.gameConfig, null, 2)
+                )
+                console.log(
+                  '[join-arcade-session] memory-quiz - Extracted memoryQuizConfig:',
+                  JSON.stringify(memoryQuizConfig, null, 2)
+                )
+                console.log(
+                  '[join-arcade-session] memory-quiz - playMode from config:',
+                  memoryQuizConfig.playMode
+                )
+
+                const configToPass = {
                   selectedCount: memoryQuizConfig.selectedCount || 5,
                   displayTime: memoryQuizConfig.displayTime || 2.0,
                   selectedDifficulty: memoryQuizConfig.selectedDifficulty || 'easy',
                   playMode: memoryQuizConfig.playMode || 'cooperative',
-                })
+                }
+                console.log(
+                  '[join-arcade-session] memory-quiz - Config being passed to getInitialState:',
+                  JSON.stringify(configToPass, null, 2)
+                )
+
+                initialState = validator.getInitialState(configToPass)
+                console.log(
+                  '[join-arcade-session] memory-quiz - initialState.playMode after getInitialState:',
+                  initialState.playMode
+                )
               } else {
                 // Fallback for other games
                 initialState = validator.getInitialState(room.gameConfig || {})
@@ -129,7 +152,17 @@ export function initializeSocketServer(httpServer: HTTPServer) {
               roomId,
               version: session.version,
               sessionUserId: session.userId,
+              gameName: session.currentGame,
             })
+
+            // Log playMode specifically for memory-quiz
+            if (session.currentGame === 'memory-quiz') {
+              console.log(
+                '[join-arcade-session] memory-quiz session - gameState.playMode:',
+                (session.gameState as any).playMode
+              )
+            }
+
             socket.emit('session-state', {
               gameState: session.gameState,
               currentGame: session.currentGame,