Added dialog window to confirm or reject processed payment

frontend/pweb/lib/pages/payment_methods/page.dart

@@ -13,6 +13,7 @@ import 'package:pshared/provider/payment/wallets.dart';
 import 'package:pweb/pages/payment_methods/payment_page/body.dart';
 import 'package:pweb/widgets/sidebar/destinations.dart';
 import 'package:pweb/services/posthog.dart';
+import 'package:pweb/widgets/dialogs/payment_status_dialog.dart';
 
 
 class PaymentPage extends StatefulWidget {
@@ -83,13 +84,13 @@ class _PaymentPageState extends State<PaymentPage> {
     final paymentProvider = context.read<PaymentProvider>();
     if (paymentProvider.isLoading) return;
 
-    paymentProvider.pay().then((_) {
-      PosthogService.paymentInitiated(method: flowProvider.selectedType);
-    }).catchError((error) {
+    paymentProvider.pay().then((payment) {
       if (!mounted) return;
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(error.toString())),
-      );
+      final isSuccess = payment != null && paymentProvider.error == null;
+      showPaymentStatusDialog(context, isSuccess: isSuccess);
+      if (isSuccess) {
+        PosthogService.paymentInitiated(method: flowProvider.selectedType);
+      }
     });
   }
 

frontend/pweb/lib/widgets/dialogs/payment_status_dialog.dart

@@ -0,0 +1,34 @@
+import 'package:flutter/material.dart';
+
+import 'package:pweb/generated/i18n/app_localizations.dart';
+
+
+Future<void> showPaymentStatusDialog(BuildContext context, {required bool isSuccess}) {
+  return showDialog<void>(
+    context: context,
+    builder: (dialogContext) {
+      final l10n = AppLocalizations.of(dialogContext)!;
+      return AlertDialog(
+        icon: isSuccess
+            ? const Icon(Icons.check_circle, color: Colors.green, size: 48)
+            : const Icon(Icons.error, color: Colors.red, size: 48),
+        title: Text(
+          isSuccess
+              ? l10n.paymentStatusSuccessTitle
+              : l10n.paymentStatusFailureTitle,
+        ),
+        content: Text(
+          isSuccess
+              ? l10n.paymentStatusSuccessMessage
+              : l10n.paymentStatusFailureMessage,
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.of(dialogContext).pop(),
+            child: Text(l10n.ok),
+          ),
+        ],
+      );
+    },
+  );
+}