completed group batch feature

lib/screens/confirm/confirm_screen.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import 'package:qpay/models/responsive_policy.dart';
 import 'package:qpay/screens/confirm/confirm_controller.dart';
+import 'package:qpay/widgets/app_snack_bar.dart';
 import 'package:skeletonizer/skeletonizer.dart';
 
 class ConfirmScreen extends StatefulWidget {
@@ -65,17 +66,11 @@ class _ConfirmScreenState extends State<ConfirmScreen>
       final response = await controller.doTransaction();
       if (!response.isSuccess) {
         if (context.mounted) {
-          ScaffoldMessenger.of(context).showSnackBar(
-            SnackBar(
-              content: Text(
-                controller.model.errorMessage ??
-                    response.error ??
-                    "Transaction failed",
-              ),
-              behavior: SnackBarBehavior.floating,
-              width: 600,
-              backgroundColor: Colors.deepOrange,
-            ),
+          AppSnackBar.showError(
+            context,
+            controller.model.errorMessage ??
+                response.error ??
+                "Transaction failed",
           );
         }
         return;