feat(order-details): add mobile display logic and remove unused status methods

- Introduced a new property to display the user's mobile number or fallback to the address phone number in OrderDetailsDialog.
- Removed obsolete methods for determining order status color and text, streamlining the component's code.

src/BackOffice/Pages/DiscountShop/Components/OrderDetailsDialog.razor.cs

@@ -20,6 +20,9 @@ public partial class OrderDetailsDialog
     private bool _isSaving;
     private List<TimelineStep> _timelineSteps = new();
 
+    private string? DisplayMobile =>
+        !string.IsNullOrWhiteSpace(Order.UserMobile) ? Order.UserMobile : Order.Address?.Phone;
+
     protected override void OnInitialized()
     {
         _newStatus = Order.Status;
@@ -130,36 +133,6 @@ public partial class OrderDetailsDialog
 
     private void Close() => MudDialog.Close();
 
-    private Color GetStatusColor(OrderStatus status)
-    {
-        return status switch
-        {
-            OrderStatus.Pending => Color.Warning,
-            OrderStatus.Paid => Color.Info,
-            OrderStatus.Processing => Color.Primary,
-            OrderStatus.Shipped => Color.Secondary,
-            OrderStatus.Delivered => Color.Success,
-            OrderStatus.Cancelled => Color.Error,
-            OrderStatus.Returned => Color.Dark,
-            _ => Color.Default
-        };
-    }
-
-    private string GetStatusText(OrderStatus status)
-    {
-        return status switch
-        {
-            OrderStatus.Pending => "در انتظار پرداخت",
-            OrderStatus.Paid => "پرداخت شده",
-            OrderStatus.Processing => "در حال آماده‌سازی",
-            OrderStatus.Shipped => "ارسال شده",
-            OrderStatus.Delivered => "تحویل داده شده",
-            OrderStatus.Cancelled => "لغو شده",
-            OrderStatus.Returned => "مرجوع شده",
-            _ => "نامشخص"
-        };
-    }
-
     private Color GetPaymentStatusColor(int status) => status switch
     {
         0 => Color.Warning,