chore(release): 4.68.1 [skip ci]

## [4.68.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.68.0...v4.68.1) (2025-10-23)

### Performance Improvements

* **complement-race:** increase spring animation responsiveness to reduce lag ([5bd0dad](5bd0dadfdf))

CHANGELOG.md

@@ -1,3 +1,10 @@
+## [4.68.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.68.0...v4.68.1) (2025-10-23)
+
+
+### Performance Improvements
+
+* **complement-race:** increase spring animation responsiveness to reduce lag ([5bd0dad](https://github.com/antialias/soroban-abacus-flashcards/commit/5bd0dadfdf9d6d81d7db4374983e40de00effecb))
+
 ## [4.68.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.67.1...v4.68.0) (2025-10-22)
 
 

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

@@ -89,7 +89,7 @@ export function GhostTrain({
     y: locomotiveTarget?.y ?? 0,
     rotation: locomotiveTarget?.rotation ?? 0,
     opacity: locomotiveTarget?.opacity ?? 1,
-    config: { tension: 280, friction: 60 }, // Smooth but responsive
+    config: { tension: 600, friction: 35 }, // Fast/responsive to match local train
   })
 
   // Calculate target transforms for cars (used by spring animations)
@@ -133,7 +133,7 @@ export function GhostTrain({
       y: target.y,
       rotation: target.rotation,
       opacity: target.opacity,
-      config: { tension: 280, friction: 60 },
+      config: { tension: 600, friction: 35 }, // Fast/responsive to match local train
     }))
   )
 

apps/web/src/app/arcade/complement-race/hooks/useTrainTransforms.ts

@@ -41,7 +41,7 @@ export function useTrainTransforms({
     x: locomotiveTarget.x,
     y: locomotiveTarget.y,
     rotation: locomotiveTarget.rotation,
-    config: { tension: 280, friction: 60 },
+    config: { tension: 600, friction: 35 }, // Fast/responsive to avoid lag
   })
 
   // Calculate target transforms for train cars (each car follows behind the locomotive)
@@ -98,7 +98,7 @@ export function useTrainTransforms({
       rotation: target.rotation,
       opacity: target.opacity,
       position: target.position,
-      config: { tension: 280, friction: 60 },
+      config: { tension: 600, friction: 35 }, // Fast/responsive to avoid lag
     }))
   )
 
@@ -128,7 +128,7 @@ export function useTrainTransforms({
   // Animated spring for smooth locomotive opacity
   const locomotiveOpacity = useSpring({
     opacity: locomotiveOpacityTarget,
-    config: { tension: 280, friction: 60 },
+    config: { tension: 600, friction: 35 }, // Fast/responsive to avoid lag
   })
 
   return {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "soroban-monorepo",
-  "version": "4.68.0",
+  "version": "4.68.1",
   "private": true,
   "description": "Beautiful Soroban Flashcard Generator - Monorepo",
   "workspaces": [