Fixed two critical issues preventing offline-first operation:
1. **Instant startup** - Removed blocking GetDB() call during server
initialization. Server now starts in <10ms instead of 1+ minute.
- Changed setupRouter() to use lazy DB connection via ConnectionManager
- mariaDB connection is now nil on startup, established only when needed
- Fixes timeout issues when MariaDB is unreachable
2. **Offline mode nil pointer panics** - Added graceful degradation
when database is offline:
- ComponentService.GetCategories() returns DefaultCategories if repo is nil
- ComponentService.List/GetByLotName checks for nil repo
- PricelistService methods return empty/error responses in offline mode
- All methods properly handle nil repositories
**Before**: Server startup took 1min+ and crashed with nil pointer panic
when trying to load /configurator page offline.
**After**: Server starts instantly and serves pages in offline mode using
DefaultCategories and SQLite data.
Related to Phase 2.5: Full Offline Mode (local-first architecture)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Michael Chus
c024b96de7