feat: Implement offline library synchronization with IndexedDB

- Added `useOfflineLibrarySync` hook for managing offline library sync operations.
- Created `OfflineLibrarySync` component for UI integration.
- Developed `offlineLibraryDB` for IndexedDB interactions, including storing and retrieving albums, artists, songs, and playlists.
- Implemented sync operations for starred items, playlists, and scrobbling.
- Added auto-sync functionality when coming back online.
- Included metadata management for sync settings and statistics.
- Enhanced error handling and user feedback through toasts.

app/components/CacheManagement.tsx

@@ -95,16 +95,16 @@ export function CacheManagement() {
     });
   };
 
-  const loadOfflineItems = useCallback(() => {
+  const loadOfflineItems = useCallback(async () => {
     if (isOfflineInitialized) {
-      const items = getOfflineItems();
+      const items = await getOfflineItems();
       setOfflineItems(items);
     }
   }, [isOfflineInitialized, getOfflineItems]);
 
   useEffect(() => {
-    loadCacheStats();
-    loadOfflineItems();
+  loadCacheStats();
+  loadOfflineItems();
     
     // Load offline mode settings
     const storedOfflineMode = localStorage.getItem('offline-mode-enabled');