修复定时器与动画回调清理不完整问题

src/app/blindbox/[code]/page.tsx

@@ -42,7 +42,11 @@ export default function BlindboxRoomPage() {
   const timersRef = useRef<ReturnType<typeof setTimeout>[]>([]);
 
   useEffect(() => {
-    return () => { timersRef.current.forEach(clearTimeout); };
+    const timers = timersRef.current;
+    return () => {
+      timers.forEach(clearTimeout);
+      timers.length = 0;
+    };
   }, []);
 
   // Hook: Room
@@ -58,7 +62,6 @@ export default function BlindboxRoomPage() {
     input, setInput, submitting, suggestions, suggestionsLoading,
     suggestionsSource, poolCount, setPoolCount, myIdeas, drawnHistory,
     setDrawnHistory, submitFlash, error, setError, inputRef,
-    boxControls: ideaBoxControls,
     fetchIdeas, fetchSuggestions, refreshSuggestions,
     handleSubmit, handleEditIdea, handleDeleteIdea,
   } = useBlindboxIdeas(room, profile);