feat(profile): add data storage settings screen with cache management

Add DataStorageScreen for managing media cache and storage:
- Display cache statistics (image/video/audio counts and sizes)
- Show AsyncStorage usage information
- Add clear all cache functionality
- Add cleanup expired cache option (7 days threshold)
- Add storage usage breakdown by category
- Add "Last cleaned" timestamp display

Also fix MediaCacheManager to skip native cache operations on web platform:
- Return original URI directly on web without caching
- Skip directory creation on web
- Skip file existence checks on web
- Skip startup and periodic cleanup on web

src/screens/profile/SettingsScreen.tsx

@@ -239,10 +239,9 @@ export const SettingsScreen: React.FC = () => {
         break;
       }
 
-      case 'data_storage': {
-        Alert.alert('数据与存储', '缓存清理功能即将上线！');
+      case 'data_storage':
+        router.push(hrefs.hrefProfileDataStorage());
         break;
-      }
       case 'about':
         router.push(hrefs.hrefProfileAbout());
         break;