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lib/features/auth/domain/entities/user.dart

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+import 'package:freezed_annotation/freezed_annotation.dart';
+
+import '../../../../shared/models/user_role.dart';
+
+part 'user.freezed.dart';
+part 'user.g.dart';
+
+@freezed
+class User with _$User {
+  const factory User({
+    required String id,
+    required String email,
+    required String name,
+    @Default(UserRole.user) UserRole role,
+    String? avatarUrl,
+    DateTime? createdAt,
+    DateTime? lastLoginAt,
+    @Default(true) bool isActive,
+  }) = _User;
+
+  factory User.fromJson(Map<String, dynamic> json) => _$UserFromJson(json);
+}

lib/features/auth/domain/repositories/auth_repository.dart

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+import '../entities/user.dart';
+
+abstract class AuthRepository {
+  Future<User> login({
+    required String email,
+    required String password,
+  });
+
+  Future<User> register({
+    required String email,
+    required String password,
+    required String name,
+  });
+
+  Future<void> logout();
+
+  Future<User?> getCurrentUser();
+
+  Future<bool> isLoggedIn();
+}

lib/features/auth/domain/usecases/login_usecase.dart

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+import '../../domain/entities/user.dart';
+import '../../domain/repositories/auth_repository.dart';
+
+class LoginUseCase {
+  LoginUseCase({required this.repository});
+
+  final AuthRepository repository;
+
+  Future<User> call({
+    required String email,
+    required String password,
+  }) {
+    return repository.login(email: email, password: password);
+  }
+}

lib/features/auth/domain/usecases/logout_usecase.dart

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+import '../../domain/repositories/auth_repository.dart';
+
+class LogoutUseCase {
+  LogoutUseCase({required this.repository});
+
+  final AuthRepository repository;
+
+  Future<void> call() => repository.logout();
+}

lib/features/auth/domain/usecases/register_usecase.dart

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+import '../../domain/entities/user.dart';
+import '../../domain/repositories/auth_repository.dart';
+
+class RegisterUseCase {
+  RegisterUseCase({required this.repository});
+
+  final AuthRepository repository;
+
+  Future<User> call({
+    required String email,
+    required String password,
+    required String name,
+  }) {
+    return repository.register(
+      email: email,
+      password: password,
+      name: name,
+    );
+  }
+}