fix(complement-race): resolve infinite render loop in useTrackManagement

Fixed "Maximum update depth exceeded" error by removing displayPassengers
from the effect dependency array. The effect calls setDisplayPassengers,
which was triggering infinite re-renders at 60fps update frequency.

The displayPassengers state is only used for comparison inside the effect,
not as an input that should trigger re-execution.

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

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

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

@@ -104,7 +104,9 @@ export function useTrackManagement({
       setDisplayPassengers(passengers)
     }
     // Otherwise, keep displaying old passengers until train resets
-  }, [passengers, displayPassengers, trainPosition, currentRoute])
+    // Note: displayPassengers is intentionally NOT in deps to avoid infinite loop
+    // (it's used for comparison, but we don't need to re-run when it changes)
+  }, [passengers, trainPosition, currentRoute])
 
   // Generate ties and rails when path is ready
   useEffect(() => {