Frontend first draft

frontend/pweb/lib/pages/payment_page/methods/header.dart

@@ -0,0 +1,36 @@
+import 'package:flutter/material.dart';
+
+import 'package:pweb/generated/i18n/app_localizations.dart';
+
+
+class PaymentConfigHeader extends StatelessWidget {
+  final VoidCallback onAdd;
+  const PaymentConfigHeader({super.key, required this.onAdd});
+
+  @override
+  Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context)!;
+    final theme = Theme.of(context);
+
+    return Column(
+      children: [
+        Text(
+          l10n.paymentConfigTitle,
+          style: theme.textTheme.headlineSmall,
+          textAlign: TextAlign.center,
+        ),
+        const SizedBox(height: 4),
+        Text(l10n.paymentConfigSubtitle, textAlign: TextAlign.center),
+        const SizedBox(height: 12),
+        SizedBox(
+          width: double.infinity,
+          child: OutlinedButton.icon(
+            icon: const Icon(Icons.add),
+            label: Text(l10n.addPaymentMethod),
+            onPressed: onAdd,
+          ),
+        ),
+      ],
+    );
+  }
+}