refactoring for recipient addition page

frontend/pweb/lib/utils/payment/availability.dart

@@ -0,0 +1,26 @@
+import 'package:pshared/models/payment/methods/data.dart';
+import 'package:pshared/models/payment/type.dart';
+
+const List<PaymentType> enabledPaymentTypes = [
+  PaymentType.card,
+  PaymentType.ledger,
+  PaymentType.externalChain,
+];
+
+const List<PaymentType> previewPaymentTypes = [
+  PaymentType.bankAccount,
+];
+
+const List<PaymentType> visiblePaymentTypes = [
+  ...enabledPaymentTypes,
+  ...previewPaymentTypes,
+];
+
+const Set<PaymentType> disabledPaymentTypes = {
+  PaymentType.bankAccount,
+};
+
+MethodMap filterVisiblePaymentTypes(MethodMap source) => {
+      for (final type in visiblePaymentTypes)
+        if (source.containsKey(type)) type: source[type],
+    };

frontend/pweb/lib/utils/payment/selector_type.dart

@@ -10,12 +10,14 @@ class PaymentTypeSelector extends StatelessWidget {
   final MethodMap availableTypes;
   final PaymentType selectedType;
   final ValueChanged<PaymentType> onSelected;
+  final Set<PaymentType> disabledTypes;
 
   const PaymentTypeSelector({
     super.key,
     required this.availableTypes,
     required this.selectedType,
     required this.onSelected,
+    this.disabledTypes = const {},
   });
 
   static const double _chipSpacing = 12.0;
@@ -30,14 +32,16 @@ class PaymentTypeSelector extends StatelessWidget {
       runSpacing: _chipSpacing,
       children: availableTypes.keys.map((type) {
         final isSelected = selectedType == type;
+        final isDisabled = disabledTypes.contains(type);
+        final labelColor = isSelected
+            ? theme.colorScheme.onPrimary
+            : theme.colorScheme.onSurface.withValues(alpha: isDisabled ? 0.55 : 1.0);
 
         return ChoiceChip(
           label: Text(
             getPaymentTypeLabel(context, type),
             style: theme.textTheme.titleMedium!.copyWith(
-              color: isSelected
-                  ? theme.colorScheme.onPrimary
-                  : theme.colorScheme.onSurface,
+              color: labelColor,
             ),
           ),
           selected: isSelected,
@@ -47,7 +51,7 @@ class PaymentTypeSelector extends StatelessWidget {
           shape: RoundedRectangleBorder(
             borderRadius: BorderRadius.circular(_chipBorderRadius),
           ),
-          onSelected: (_) => onSelected(type),
+          onSelected: isDisabled ? null : (_) => onSelected(type),
         );
       }).toList(),
     );