Update order pages with error handling and improved product images

src/FrontOffice.Main/Pages/Store/Cart.razor.cs

@@ -46,6 +46,9 @@ public partial class Cart : ComponentBase, IDisposable
 
     private static string FormatPrice(long price) => string.Format("{0:N0} ", price);
 
+    private static string GetProductImageUrl(string? imageUrl)
+        => string.IsNullOrWhiteSpace(imageUrl) ? "/images/product-placeholder.svg" : imageUrl;
+
     public void Dispose()
     {
         CartService.OnChange -= StateHasChanged;