Make spec filtering more robust with case-insensitive matching

- Updated SearchLevel2ModelsQueryHandler to handle multiple spec name formats:
  - Seats: 'Seats' or 'seats' (case-insensitive)
  - Fuel Type: 'Fuel Type', 'fuelType', or 'fuel_type' (case-insensitive)
- Updated SearchVehiclesQueryHandler with same robust matching
- Now handles different possible database formats for spec names
- Build successful with no compilation errors

Author: Dang

VehicleShowroomManagement/src/Application/Features/VehicleModels/Queries/SearchLevel2Models/SearchLevel2ModelsQueryHandler.cs

@@ -15,8 +15,16 @@ public async Task<SearchLevel2ModelsResult> Handle(SearchLevel2ModelsQuery reque
                 foreach (var m in models)
                 {
                     var specs = await specRepository.FindAsync(s => s.ModelId == m.ModelNumber, cancellationToken);
-                    var seatsOk = !request.Seats.HasValue || specs.Any(s => s.SpecName == "Seats" && int.TryParse(s.SpecValue, out var v) && v == request.Seats.Value);
-                    var fuelOk = string.IsNullOrWhiteSpace(request.FuelType) || specs.Any(s => s.SpecName == "Fuel Type" && string.Equals(s.SpecValue, request.FuelType, StringComparison.OrdinalIgnoreCase));
+                    var vehicleSpecs = specs as VehicleSpec[] ?? specs.ToArray();
+                    var seatsOk = !request.Seats.HasValue || vehicleSpecs.Any(s => 
+                        (s.SpecName.Equals("Seats", StringComparison.OrdinalIgnoreCase) || 
+                         s.SpecName.Equals("seats", StringComparison.OrdinalIgnoreCase)) && 
+                        int.TryParse(s.SpecValue, out var v) && v == request.Seats.Value);
+                    var fuelOk = string.IsNullOrWhiteSpace(request.FuelType) || vehicleSpecs.Any(s => 
+                        (s.SpecName.Equals("Fuel Type", StringComparison.OrdinalIgnoreCase) || 
+                         s.SpecName.Equals("fuelType", StringComparison.OrdinalIgnoreCase) ||
+                         s.SpecName.Equals("fuel_type", StringComparison.OrdinalIgnoreCase)) && 
+                        string.Equals(s.SpecValue, request.FuelType, StringComparison.OrdinalIgnoreCase));
                     if (seatsOk && fuelOk) filtered.Add(m);
                 }
                 models = filtered;

VehicleShowroomManagement/src/Application/Features/Vehicles/Queries/SearchVehicles/SearchVehiclesQueryHandler.cs

@@ -17,8 +17,15 @@ public async Task<SearchVehiclesResult> Handle(SearchVehiclesQuery request, Canc
             {
                 var allSpecs = await specRepository.GetAllAsync(cancellationToken);
                 var specs = allSpecs.Where(s =>
-                    (request.Seats == null || (s.SpecName == "Seats" && int.TryParse(s.SpecValue, out var val) && val == request.Seats)) ||
-                    (!string.IsNullOrWhiteSpace(request.FuelType) && s.SpecName == "Fuel Type" && s.SpecValue.Equals(request.FuelType, StringComparison.OrdinalIgnoreCase))
+                    (request.Seats == null || 
+                     ((s.SpecName.Equals("Seats", StringComparison.OrdinalIgnoreCase) || 
+                       s.SpecName.Equals("seats", StringComparison.OrdinalIgnoreCase)) && 
+                      int.TryParse(s.SpecValue, out var val) && val == request.Seats)) ||
+                    (!string.IsNullOrWhiteSpace(request.FuelType) && 
+                     ((s.SpecName.Equals("Fuel Type", StringComparison.OrdinalIgnoreCase) || 
+                       s.SpecName.Equals("fuelType", StringComparison.OrdinalIgnoreCase) ||
+                       s.SpecName.Equals("fuel_type", StringComparison.OrdinalIgnoreCase)) && 
+                      s.SpecValue.Equals(request.FuelType, StringComparison.OrdinalIgnoreCase)))
                 );
                 var modelIds = specs.Select(s => s.ModelId).ToHashSet();
                 if (modelIds.Count > 0)