ing connected, makign some features

lib/providers/bank_provider.dart

@@ -5,13 +5,23 @@ import 'package:flutter/foundation.dart';
 
 import '../models/bank.dart';
 import '../services/ingtrak_api.dart';
+import '../services/storage_service.dart';
 import '../utils/constants.dart';
 
 /// App-wide banking state backed by the local ingtrak API.
 class BankController extends ChangeNotifier {
-  BankController({IngtrakApi? api}) : _api = api ?? IngtrakApi();
+  BankController({IngtrakApi? api, this._storage})
+      : _api = api ?? IngtrakApi() {
+    final cached = _storage?.loadBankCache();
+    if (cached != null && cached.status.linked) {
+      _status = cached.status;
+      _balance = cached.balance;
+      _transactions = cached.transactions;
+    }
+  }
 
   final IngtrakApi _api;
+  final StorageService? _storage;
 
   ConnectStatus _status = ConnectStatus.disconnected;
   BankBalance? _balance;
@@ -32,6 +42,22 @@ class BankController extends ChangeNotifier {
   String get apiBaseUrl => _api.baseUrl;
   String? get pendingState => _pendingState;
 
+  Future<void> _persistCache() async {
+    final storage = _storage;
+    if (storage == null) return;
+    if (!_status.linked) {
+      await storage.clearBankCache();
+      return;
+    }
+    await storage.saveBankCache(
+      BankCache(
+        status: _status,
+        balance: _balance,
+        transactions: _transactions,
+      ),
+    );
+  }
+
   /// Load status; if linked, also load balance + transactions.
   Future<void> refresh() async {
     _isLoading = true;
@@ -42,15 +68,26 @@ class BankController extends ChangeNotifier {
       _status = await _api.fetchStatus();
       if (_status.linked) {
         await _loadLinkedData();
+        await _persistCache();
       } else {
         _balance = null;
         _transactions = const [];
+        await _persistCache();
       }
     } on IngtrakApiException catch (error, stackTrace) {
-      _error = error.message;
+      // Keep cached linked data on transient API errors.
+      if (!isLinked || (_balance == null && _transactions.isEmpty)) {
+        _error = error.message;
+      } else {
+        _error = 'Using saved data · ${error.message}';
+      }
       debugPrint('BankController.refresh failed: $error\n$stackTrace');
     } catch (error, stackTrace) {
-      _error = 'Could not reach $apiBaseUrl';
+      if (!isLinked || (_balance == null && _transactions.isEmpty)) {
+        _error = 'Could not reach $apiBaseUrl';
+      } else {
+        _error = 'Using saved data · offline/unreachable API';
+      }
       debugPrint('BankController.refresh failed: $error\n$stackTrace');
     } finally {
       _isLoading = false;
@@ -73,8 +110,12 @@ class BankController extends ChangeNotifier {
         _balance = null;
         _transactions = const [];
         _error = error.message;
-      } else {
+        await _persistCache();
+      } else if (_balance == null && _transactions.isEmpty) {
         _error = error.message;
+      } else {
+        // Keep previous balance/txs if refresh of data fails but still linked.
+        _error = 'Using saved data · ${error.message}';
       }
     }
   }
@@ -156,6 +197,7 @@ class BankController extends ChangeNotifier {
       _pendingState = null;
       if (_status.linked) {
         await _loadLinkedData();
+        await _persistCache();
       }
       return _status.linked;
     } on IngtrakApiException catch (error, stackTrace) {