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 BookmarkLabel model and DTO
- Create LabelsRepository and PLabelsRepository protocol
- Add GetLabelsUseCase for fetching labels
- Update BookmarkMapper to handle labels
- Add LabelsView and LabelsViewModel for UI
- Update BookmarksView and BookmarkLabelsView to display labels
- Add green2 color asset for labels
- Update API and repository layers to support labels
- Split TabView and Sidebar logic into PhoneTabView, PadSidebarView, SidebarTab, and BookmarkState for better device adaptation
- Remove old SettingsViewModel, introduce SettingsGeneralViewModel and SettingsServerViewModel for modular settings
- Update BookmarksView and BookmarksViewModel for new paginated and filtered data model
- Clean up and modularize settings UI (SettingsGeneralView, SettingsServerView, FontSettingsView)
- Remove obsolete files (old TabView, File.swift, SettingsViewModel, etc.)
- Add BookmarksPageDto and update related data flow
- Various UI/UX improvements and code cleanup
BREAKING: Settings and navigation structure refactored, old settings logic removed
- Add BookmarkState enum with unread, favorite, and archived states
- Extend API layer with query parameter filtering for bookmark states
- Update Bookmark domain model to match complete API response schema
- Implement BookmarkListView with card-based UI and preview images
- Add BookmarkListViewModel with state management and error handling
- Enhance BookmarkDetailView with meta information and WebView rendering
- Create comprehensive DTO mapping for all bookmark fields
- Add TabView with state-based bookmark filtering
- Implement date formatting utilities for ISO8601 timestamps
- Add progress indicators and pull-to-refresh functionality
