class AuthResponse {
  final String token;
  final String? username;
  final String? nickname;

  /// 头像相对路径。null = 用默认头像
  final String? avatar;

  const AuthResponse({
    required this.token,
    this.username,
    this.nickname,
    this.avatar,
  });

  factory AuthResponse.fromJson(Map<String, dynamic> json) => AuthResponse(
        token: json['token']?.toString() ?? '',
        username: json['username']?.toString(),
        nickname: json['nickname']?.toString(),
        avatar: json['avatar']?.toString(),
      );
}

class UserInfo {
  final String? id;
  final String username;
  final String nickname;

  /// 头像相对路径。null = 用默认头像
  final String? avatar;

  const UserInfo({
    this.id,
    required this.username,
    required this.nickname,
    this.avatar,
  });

  Map<String, dynamic> toJson() => {
        'id': id,
        'username': username,
        'nickname': nickname,
        'avatar': avatar,
      };

  factory UserInfo.fromJson(Map<String, dynamic> json) => UserInfo(
        id: json['id']?.toString(),
        username: json['username']?.toString() ?? '',
        nickname: json['nickname']?.toString() ?? '',
        avatar: json['avatar']?.toString(),
      );
}