fix: 代码审查修复 — serde camelCase/CSP/TS检查/replay/undo/AI禁手/星位/未使用依赖

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/components/game/GameControls.tsx

@@ -8,7 +8,6 @@ interface Props {
 export default function GameControls({ onBackToMenu }: Props) {
   const { t } = useTranslation();
   const undo = useGameStore((s) => s.undo);
-  const mode = useGameStore((s) => s.mode);
   const status = useGameStore((s) => s.status);
 
   const handleUndo = () => {