sign in with pocketbase working

lib/providers/auth_provider.dart

@@ -0,0 +1,87 @@
+/// PocketBase sign-in state. Local tx/bank data is unchanged by auth.
+library;
+
+import 'package:flutter/foundation.dart';
+import 'package:pocketbase/pocketbase.dart';
+
+import '../services/storage_service.dart';
+import '../utils/constants.dart';
+
+/// Owns the PocketBase client, session persistence, and login/logout.
+class AuthController extends ChangeNotifier {
+  AuthController(this._storage);
+
+  final StorageService _storage;
+  PocketBase? _client;
+
+  PocketBase get client {
+    final pb = _client;
+    if (pb == null) {
+      throw StateError('AuthController.init() must be called before use.');
+    }
+    return pb;
+  }
+
+  bool get isLoggedIn => _client?.authStore.isValid ?? false;
+
+  RecordModel? get user => _client?.authStore.record;
+
+  String? get email {
+    final value = user?.getStringValue('email');
+    return value == null || value.isEmpty ? null : value;
+  }
+
+  String? get name {
+    final value = user?.getStringValue('name');
+    return value == null || value.isEmpty ? null : value;
+  }
+
+  String get displayName {
+    final n = name;
+    if (n != null && n.isNotEmpty) return n;
+    final e = email;
+    if (e != null && e.isNotEmpty) return e.split('@').first;
+    return 'Account';
+  }
+
+  String get initials {
+    final source = name ?? email ?? '?';
+    final parts = source.trim().split(RegExp(r'\s+'));
+    if (parts.length >= 2 && parts[0].isNotEmpty && parts[1].isNotEmpty) {
+      return '${parts[0][0]}${parts[1][0]}'.toUpperCase();
+    }
+    if (source.isNotEmpty) return source[0].toUpperCase();
+    return '?';
+  }
+
+  Future<void> init() async {
+    final store = AsyncAuthStore(
+      save: (String data) async {
+        if (data.isEmpty) {
+          await _storage.clearPocketBaseAuth();
+        } else {
+          await _storage.setPocketBaseAuth(data);
+        }
+      },
+      initial: _storage.pocketBaseAuth,
+    );
+    _client = PocketBase(kPocketBaseUrl, authStore: store);
+    _client!.authStore.onChange.listen((_) => notifyListeners());
+    notifyListeners();
+  }
+
+  Future<void> login({
+    required String email,
+    required String password,
+  }) async {
+    await client
+        .collection(kPocketBaseUsersCollection)
+        .authWithPassword(email.trim(), password);
+    notifyListeners();
+  }
+
+  Future<void> logout() async {
+    client.authStore.clear();
+    notifyListeners();
+  }
+}