fix: enable component search and pricing in offline mode

**Problem:**
Configurator was broken in offline mode - no component search
and no price calculation because /api/components returned empty list.

**Solution:**
Added local component fallback to ComponentHandler:

1. **ComponentHandler with localDB** (component.go)
   - Added localDB parameter to NewComponentHandler
   - List() now fallbacks to local_components when offline
   - Converts LocalComponent to ComponentView format
   - Preserves prices from local cache

2. **Updated initialization** (main.go)
   - Pass localDB to NewComponentHandler

**Impact:**
- ✅ Component search works offline
- ✅ Prices load from local_components table
- ✅ Configuration creation fully functional offline
- ✅ Price calculation works with cached prices

**Testing:**
- Verified /api/components returns local components
- Verified current_price field populated from cache
- Search, filtering, and pagination work correctly

Fixes critical Phase 2.5 offline mode issue.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

cmd/server/main.go

@@ -364,7 +364,7 @@ func setupRouter(cfg *config.Config, local *localdb.LocalDB, connMgr *db.Connect
 	configService := services.NewLocalConfigurationService(local, syncService, quoteService, isOnline)
 
 	// Handlers
-	componentHandler := handlers.NewComponentHandler(componentService)
+	componentHandler := handlers.NewComponentHandler(componentService, local)
 	quoteHandler := handlers.NewQuoteHandler(quoteService)
 	exportHandler := handlers.NewExportHandler(exportService, configService, componentService)
 	pricingHandler := handlers.NewPricingHandler(mariaDB, pricingService, alertService, componentRepo, priceRepo, statsRepo)