refactoring for recipient addition page

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

@@ -11,6 +11,7 @@ import 'package:pshared/provider/recipient/pmethods.dart';
 import 'package:pshared/provider/recipient/provider.dart';
 
 import 'package:pweb/pages/payment_methods/payment_page/body.dart';
+import 'package:pweb/utils/recipient/filtering.dart';
 import 'package:pweb/widgets/sidebar/destinations.dart';
 import 'package:pweb/services/posthog.dart';
 import 'package:pweb/widgets/dialogs/payment_status_dialog.dart';
@@ -35,6 +36,8 @@ class PaymentPage extends StatefulWidget {
 class _PaymentPageState extends State<PaymentPage> {
   late final TextEditingController _searchController;
   late final FocusNode _searchFocusNode;
+  Recipient? _previousRecipient;
+  String _query = '';
 
   @override
   void initState() {
@@ -58,17 +61,25 @@ class _PaymentPageState extends State<PaymentPage> {
   }
 
   void _handleSearchChanged(String query) {
-    context.read<RecipientsProvider>().setQuery(query);
+    setState(() {
+      _query = query;
+    });
   }
 
   void _handleRecipientSelected(Recipient recipient) {
     final recipientProvider = context.read<RecipientsProvider>();
+    setState(() {
+      _previousRecipient = recipientProvider.currentObject;
+    });
     recipientProvider.setCurrentObject(recipient.id);
     _clearSearchField();
   }
 
   void _handleRecipientCleared() {
     final recipientProvider = context.read<RecipientsProvider>();
+    setState(() {
+      _previousRecipient = recipientProvider.currentObject;
+    });
     recipientProvider.setCurrentObject(null);
     _clearSearchField();
   }
@@ -76,7 +87,9 @@ class _PaymentPageState extends State<PaymentPage> {
   void _clearSearchField() {
     _searchController.clear();
     _searchFocusNode.unfocus();
-    context.read<RecipientsProvider>().setQuery('');
+    setState(() {
+      _query = '';
+    });
   }
 
   void _handleSendPayment() {
@@ -97,16 +110,21 @@ class _PaymentPageState extends State<PaymentPage> {
   @override
   Widget build(BuildContext context) {
     final methodsProvider = context.watch<PaymentMethodsProvider>();
-    final recipientProvider = context.read<RecipientsProvider>();
-    final recipient = context.select<RecipientsProvider, Recipient?>(
-      (provider) => provider.currentObject,
+    final recipientProvider = context.watch<RecipientsProvider>();
+    final recipient = recipientProvider.currentObject;
+    final filteredRecipients = filterRecipients(
+      recipients: recipientProvider.recipients,
+      query: _query,
     );
 
     return PaymentPageBody(
       onBack: widget.onBack,
       fallbackDestination: widget.fallbackDestination,
       recipient: recipient,
+      previousRecipient: _previousRecipient,
       recipientProvider: recipientProvider,
+      searchQuery: _query,
+      filteredRecipients: filteredRecipients,
       methodsProvider: methodsProvider,
       onWalletSelected: context.read<WalletsController>().selectWallet,
       searchController: _searchController,