Create separate cache repository layer:
- Add POfflineCacheRepository protocol for cache operations
- Add OfflineCacheRepository with CoreData and Kingfisher
- Add OfflineCacheSyncUseCase to coordinate sync workflow
- Update PBookmarksRepository to focus on API calls only
- Extend BookmarkEntityMapper with toDomain() conversion
UseCase coordinates between cache, API, and settings repositories
following dependency inversion principle.
Add comprehensive offline bookmark support with sync capabilities:
- Implement offline bookmark storage using Core Data with App Group sharing
- Add Share Extension support for saving bookmarks when server unavailable
- Create LocalBookmarksSyncView for managing offline bookmark queue
- Add OfflineSyncManager for automatic and manual sync operations
- Implement ServerConnectivity monitoring and status handling
- Add badge notifications on More tab for pending offline bookmarks
- Fix tag pagination in Share Extension with unique IDs for proper rendering
- Update PhoneTabView with event-based badge count updates
- Add App Group entitlements for data sharing between main app and extension
The offline system provides seamless bookmark saving when disconnected,
with automatic sync when connection is restored and manual sync options.
