fix settings

lib/features/auth/data/datasources/auth_local_datasource.dart

@@ -0,0 +1,73 @@
+import 'dart:convert';
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+import '../../../../core/errors/exceptions.dart';
+import '../models/user_model.dart';
+
+abstract class AuthLocalDataSource {
+  Future<void> cacheUser(UserModel user);
+  Future<UserModel?> getCachedUser();
+  Future<void> clearCache();
+  Future<void> cacheToken(String token);
+  Future<String?> getCachedToken();
+}
+
+class AuthLocalDataSourceImpl implements AuthLocalDataSource {
+  final FlutterSecureStorage secureStorage;
+
+  static const String userKey = 'CACHED_USER';
+  static const String tokenKey = 'AUTH_TOKEN';
+
+  AuthLocalDataSourceImpl({required this.secureStorage});
+
+  @override
+  Future<void> cacheUser(UserModel user) async {
+    try {
+      final userJson = json.encode(user.toJson());
+      await secureStorage.write(key: userKey, value: userJson);
+    } catch (e) {
+      throw CacheException('Failed to cache user');
+    }
+  }
+
+  @override
+  Future<UserModel?> getCachedUser() async {
+    try {
+      final userJson = await secureStorage.read(key: userKey);
+      if (userJson != null) {
+        final userMap = json.decode(userJson) as Map<String, dynamic>;
+        return UserModel.fromJson(userMap);
+      }
+      return null;
+    } catch (e) {
+      throw CacheException('Failed to get cached user');
+    }
+  }
+
+  @override
+  Future<void> clearCache() async {
+    try {
+      await secureStorage.delete(key: userKey);
+      await secureStorage.delete(key: tokenKey);
+    } catch (e) {
+      throw CacheException('Failed to clear cache');
+    }
+  }
+
+  @override
+  Future<void> cacheToken(String token) async {
+    try {
+      await secureStorage.write(key: tokenKey, value: token);
+    } catch (e) {
+      throw CacheException('Failed to cache token');
+    }
+  }
+
+  @override
+  Future<String?> getCachedToken() async {
+    try {
+      return await secureStorage.read(key: tokenKey);
+    } catch (e) {
+      throw CacheException('Failed to get cached token');
+    }
+  }
+}