style(math-sprint): apply Biome formatting

**Changes**: Auto-formatting from Biome formatter.
- Provider: Multi-line formatting for useArcadeSession call
- SetupPhase: Multi-line formatting for long className

No logic changes, purely stylistic.

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

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

apps/web/src/arcade-games/math-sprint/Provider.tsx

@@ -92,13 +92,14 @@ export function MathSprintProvider({ children }: { children: ReactNode }) {
   )
 
   // Arcade session integration
-  const { state, sendMove, exitSession, lastError, clearError } =
-    useArcadeSession<MathSprintState>({
+  const { state, sendMove, exitSession, lastError, clearError } = useArcadeSession<MathSprintState>(
+    {
       userId: viewerId || '',
       roomId: roomData?.id,
       initialState,
       applyMove: (state) => state, // Server handles all state updates
-    })
+    }
+  )
 
   // Action: Start game
   const startGame = useCallback(() => {

apps/web/src/arcade-games/math-sprint/components/SetupPhase.tsx

@@ -137,7 +137,9 @@ export function SetupPhase() {
               width: '100%',
             })}
           />
-          <div className={css({ display: 'flex', justifyContent: 'space-between', fontSize: 'xs' })}>
+          <div
+            className={css({ display: 'flex', justifyContent: 'space-between', fontSize: 'xs' })}
+          >
             <span>5</span>
             <span>10</span>
             <span>15</span>