- Introduced `OfflineSyncManager`, `OfflineToggle`, `OfflinePinSetup`, `OfflineIndicator`, and `OfflineSyncDetails` components to support offline mode functionality.
- Added PIN verification (`OfflinePinVerify`) for secure offline access.
- Implemented sync options for books (current, recent, all) with progress tracking and improved user feedback.
- Enhanced offline context integration and error handling in sync processes.
- Refined UI elements for better online/offline status visibility and manual sync controls.
