feat: refactor code

lib/feature/auth/data/data_source/local/auth_local_data.dart

@@ -0,0 +1,16 @@
+import '../../../../../core/storage/token_storage.dart';
+
+/// ذخیره‌ی محلیِ توکن احراز هویت.
+class AuthLocalData {
+  final TokenStorage _storage;
+  AuthLocalData(this._storage);
+
+  Future<void> saveToken(String token) => _storage.write(token);
+  Future<String?> readToken() => _storage.read();
+  Future<void> clearToken() => _storage.clear();
+
+  Future<bool> hasToken() async {
+    final t = await _storage.read();
+    return t != null && t.isNotEmpty;
+  }
+}

lib/feature/auth/data/data_source/remote/auth_api_provider.dart

@@ -0,0 +1,20 @@
+import 'package:dio/dio.dart';
+
+import '../../../../../core/locator/locator.dart';
+import '../../../../../core/network/api_provider_imp.dart';
+
+/// تماس‌های خامِ HTTP مربوط به احراز هویت (خروجی Response).
+class AuthApiProvider {
+  ApiProviderImp get _api => locator<ApiProviderImp>();
+
+  Future<Response> loginOtp(String mobile) =>
+      _api.post('/auth/login-otp', body: {'mobile': mobile});
+
+  Future<Response> checkOtp(String mobile, String token) =>
+      _api.post('/auth/check-otp', body: {'mobile': mobile, 'token': token});
+
+  Future<Response> updateProfile(String firstName, String avatar) =>
+      _api.post('/profile', body: {'first_name': firstName, 'avatar': avatar});
+
+  Future<Response> me() => _api.get('/me');
+}