This merge brings Phase 2.5 (Full Offline Mode) with the following improvements:
- Local-first architecture: all operations work through SQLite
- Background sync worker for automatic synchronization
- Sync queue (pending_changes table) for reliable data push
- LocalConfigurationService for offline-capable CRUD operations
- Pre-create pricelist check before configuration creation
- RefreshPrices works in offline mode using local_components
- UI improvements: sync status indicator, pricelist badge, unified admin tabs
- Fixed online mode: automatic MariaDB connection on startup
- Fixed nil pointer dereference in PricingHandler alert methods
- Improved setup flow with restart requirement notification
Phase 2.5 is now complete. Ready for production.
