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.
- Add Ruby version and Fastlane setup (Gemfile, fastlane/, .ruby-version) for iOS automation and CI/CD
- Add and update Xcode schemes and project configuration
- Update entitlements and Info.plist for app and extension
- Refactor PhoneTabView: improve navigation in 'More' tab, prevent unwanted jumps, preserve deep navigation for Tags/Search
- Update KeychainHelper, BookmarkDetail model, and related ViewModels for bugfixes or enhancements
- Various UI and logic improvements in BookmarkDetail and Search views
UI/UX Improvements:
- Replace SLComposeServiceViewController with custom UIViewController
- Add beautiful green-themed UI with Readeck branding and logo
- Implement modern card-based layout with shadows and rounded corners
- Add custom cancel button and proper navigation styling
- Include loading states and comprehensive user feedback
Backend Integration:
- Add KeychainHelper integration for secure token/endpoint storage
- Implement proper API integration with async/await
- Add comprehensive error handling and status messages
- Include DTOs for API communication
Security & Configuration:
- Add keychain access groups to entitlements for both main app and extension
- Update TokenProvider to save tokens to keychain
- Modify LogoutUseCase to clear keychain data
- Update SaveServerSettingsUseCase to persist endpoint in keychain
- Configure proper build settings and file sharing between targets
Extension Lifecycle:
- Implement proper URL extraction from various sources
- Add automatic extension dismissal on success
- Ensure proper extension context handling
