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/index.ts

@@ -18,6 +18,7 @@ export { AboutScreen } from './AboutScreen';
 export { TermsOfServiceScreen } from './TermsOfServiceScreen';
 export { PrivacyPolicyScreen } from './PrivacyPolicyScreen';
 export { VerificationSettingsScreen } from './VerificationSettingsScreen';
+export { DataStorageScreen } from './DataStorageScreen';
 
 // 导出 Hook 供需要自定义的场景使用
 export { useUserProfile, createSharedProfileStyles, TABS, TAB_ICONS } from './useUserProfile';