completed group batch feature

lib/screens/pay/pay_screen.dart

@@ -6,6 +6,7 @@ import 'package:provider/provider.dart';
 import 'package:qpay/models/responsive_policy.dart';
 import 'package:qpay/screens/pay/pay_controller.dart';
 import 'package:qpay/screens/transaction_controller.dart';
+import 'package:qpay/widgets/app_snack_bar.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:skeletonizer/skeletonizer.dart';
 
@@ -169,17 +170,11 @@ class _PayScreenState extends State<PayScreen> with TickerProviderStateMixin {
 
     if (!apiResponse.isSuccess) {
       if (context.mounted) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            content: Text(
-              controller.model.errorMessage ??
-                  apiResponse.error ??
-                  "Transaction failed",
-            ),
-            behavior: SnackBarBehavior.floating,
-            width: 600,
-            backgroundColor: Colors.deepOrange,
-          ),
+        AppSnackBar.showError(
+          context,
+          controller.model.errorMessage ??
+              apiResponse.error ??
+              "Transaction failed",
         );
       }
     } else if (controller.model.status == "SUCCESS" && context.mounted) {