Complete desktop DTO integration and controller fixes

**Critical DTO Fixes:**
- ServiceResponse/Request: id → serviceId, price → servicePrice, description → serviceDesc
- SaleItemRequest: productId → prodId, removed unitPrice (backend doesn't require)
- SaleItemResponse: id → saleItemId, added prodId, removed lineTotal (calculated locally)
- TopProduct: added productId, quantitySold Integer → Long, totalRevenue → revenue
- DailySales: date LocalDate → String, totalSales → revenue, added salesCount

**Controller Updates:**
- Updated 17+ controllers and dialog controllers to use renamed DTO fields
- Fixed AnalyticsController to use nested SalesSummary and InventorySummary structures
- Fixed ServiceController/ServiceDialogController to use serviceDuration
- Fixed LoginController CUSTOMER rejection to use lblError instead of missing showError()
- Updated all ProductResponse, SupplierResponse, PetResponse, AdoptionResponse, etc. usages

**Files Changed:**
- 6 DTO classes (service, sale, analytics)
- 17+ controller classes across main and dialog controllers

**Verification:**
- Desktop project compiles successfully with mvn clean compile
- All critical JSON mapping misalignments resolved
- Phase 6, 7, and 8 complete

.gitignore

@@ -40,3 +40,4 @@ build/
 
 ## Database related
 connectionpetstore.properties
+.idea/workspace.xml