fix: 4 UI fixes for package display

1. Toman/Rial mismatch — Price from server is in Rial, now divides by 10 for correct Toman display
2. ضریب تخفیف → ضریب اعتبار label change in dialog + packages page
3. Back button already functional (ArrowForward in TitleContent) — verified
4. HTML rendering in package description via MarkupString

src/FrontOffice.Main/Utilities/PackageService.cs

@@ -20,7 +20,8 @@ public record PackageDto(
     bool SupportsDayaPurchase = false,
     bool SupportsDirectPurchase = false)
 {
-    public string FormattedPrice => string.Format("{0:N0} تومان", Price);
+    /// <summary>قیمت به تومان — مقدار Price از سرور به ریال است</summary>
+    public string FormattedPrice => string.Format("{0:N0} تومان", Price / 10);
 }
 
 /// <summary>