Enhance interaction handling: add confirmation dialog for deleting verification images and ensure OnSuccess callback is invoked after adding interactions

Co-authored-by: Copilot <copilot@github.com>

FoodsharingSiegen.Server/Dialogs/InteractionDialog.razor.cs

@@ -127,9 +127,10 @@ namespace FoodsharingSiegen.Server.Dialogs
             Interaction.UserID = CurrentUser.Id;
 
             var addR = await ProspectService.AddInteraction(Interaction);
-            if (addR.Success && OnSuccess != null) await OnSuccess.Invoke();
 
             await ModalService.Hide();
+
+            if (addR.Success && OnSuccess != null) await OnSuccess.Invoke();
         }
 
         #endregion