fix: ServiceOrder status API returns number and improve customer name fallback

- Change ServiceOrderDto.Status from string to int to return numeric status values
- Update GetServiceOrdersQueryHandler to cast status enum to int
- Improve dashboard recent-orders customerName fallback: Name -> Email -> Customer ID
- Improve dealer name fallback: Name -> Email -> No Dealer Assigned
- ServiceOrder status now returns: 1=Scheduled, 2=InProgress, 3=Completed, 4=Cancelled

Author: Dang

VehicleShowroomManagement/src/Application/Features/Dashboard/Queries/GetRecentOrders/GetRecentOrdersQueryHandler.cs

@@ -38,12 +38,12 @@ public async Task<List<RecentOrderDto>> Handle(GetRecentOrdersQuery request, Can
                     {
                         OrderId = order.Id,
                         OrderNumber = order.Id, // Using ID as order number
-                        CustomerName = customer?.Name ?? customer?.Username ?? $"Customer ID: {order.CustomerId}",
+                        CustomerName = customer?.Name ?? customer?.Email ?? $"Customer ID: {order.CustomerId}",
                         VehicleModel = model?.Name ?? order.ModelNumber,
                         TotalAmount = order.SalePrice,
                         Status = order.Status.ToString(),
                         OrderDate = order.OrderDate,
-                        SalesPersonName = dealer?.Name ?? dealer?.Username ?? "No Dealer Assigned"
+                        SalesPersonName = dealer?.Name ?? dealer?.Email ?? "No Dealer Assigned"
                     });
                 }
                 catch (Exception)

VehicleShowroomManagement/src/Application/Features/ServiceOrders/Queries/GetServiceOrders/GetServiceOrdersQueryHandler.cs

@@ -51,7 +51,7 @@ public async Task<ServiceOrdersResponse> Handle(GetServiceOrdersQuery request, C
                 Description = so.Description,
                 Cost = so.Cost,
                 Type = so.Type.ToString(),
-                Status = so.Status.ToString()
+                Status = (int)so.Status
             }).ToList();
 
             return new ServiceOrdersResponse

VehicleShowroomManagement/src/Application/Features/ServiceOrders/Queries/GetServiceOrders/ServiceOrderDto.cs

@@ -14,7 +14,7 @@ public class ServiceOrderDto
         public string? Description { get; set; }
         public decimal Cost { get; set; }
         public string Type { get; set; } = string.Empty;
-        public string Status { get; set; } = string.Empty;
+        public int Status { get; set; }
     }
 
     /// <summary>