fix: improve animation hook robustness

- Add .catch handler to scheduleNext to prevent unhandled promise
  rejections from killing the scheduling loop
- Replace `as unknown as Animation` cast with Cancellable interface
  for type-safe cleanup handles

packages/web/src/hooks/useMascotAnimation.ts

@@ -13,8 +13,9 @@ export function useMascotAnimation(
   containerRef: React.RefObject<HTMLDivElement | null>,
   state: MascotState,
 ): void {
+  interface Cancellable { cancel(): void }
   const timeoutRef = useRef<number | null>(null);
-  const activeAnimations = useRef<Animation[]>([]);
+  const activeAnimations = useRef<Cancellable[]>([]);
   const abortedRef = useRef(false);
 
   useEffect(() => {
@@ -93,6 +94,11 @@ export function useMascotAnimation(
           if (!abortedRef.current) {
             scheduleNext(fn, minMs, maxMs);
           }
+        }).catch(() => {
+          // Action failed — reschedule unless aborted
+          if (!abortedRef.current) {
+            scheduleNext(fn, minMs, maxMs);
+          }
         });
       }, delay);
     }
@@ -469,9 +475,7 @@ export function useMascotAnimation(
       // Store initial timeout so cleanup can cancel it
       activeAnimations.current.push({
         cancel: () => clearTimeout(initialTimeout),
-        finished: Promise.resolve(),
-        playState: 'running',
-      } as unknown as Animation);
+      });
     }
 
     // ═══ LONELY STATE ═══