/// 用户模型（登录/注册响应的 user 字段与 GET /users/me 的超集，字段可空按需取）
class UserModel {
  UserModel({
    required this.userId,
    this.phone,
    this.email,
    this.nickname = '',
    this.avatarUrl = '',
    this.bio = '',
    this.gender = 0,
    this.isMember = false,
    this.memberPlan,
    this.memberExpireAt,
    this.points = 0,
  });

  final int userId;
  final String? phone;
  final String? email;
  final String nickname;
  final String avatarUrl;
  final String bio;
  final int gender; // 0未知 1男 2女
  final bool isMember;
  final String? memberPlan; // monthly/yearly/lifetime/trial...
  final String? memberExpireAt; // yyyy-MM-dd HH:mm:ss
  final int points;

  factory UserModel.fromJson(Map<String, dynamic> json) => UserModel(
        userId: (json['user_id'] ?? json['id']) as int,
        phone: json['phone'] as String?,
        email: json['email'] as String?,
        nickname: (json['nickname'] as String?) ?? '',
        avatarUrl: (json['avatar_url'] as String?) ?? '',
        bio: (json['bio'] as String?) ?? '',
        gender: (json['gender'] as num?)?.toInt() ?? 0,
        isMember: (json['is_member'] as bool?) ?? false,
        memberPlan: json['member_plan'] as String?,
        memberExpireAt: json['member_expire_at'] as String?,
        points: (json['points'] as num?)?.toInt() ?? 0,
      );
}