nj/app/lib/features/auth/bloc/auth_event.dart

// 认证事件 — AuthBloc 接收的用户操作和系统事件

part of 'auth_bloc.dart';

/// 认证事件基类 — 使用 sealed class 实现穷尽匹配
sealed class AuthEvent {
  const AuthEvent();
}

/// App 启动 — 检查本地存储的认证状态
final class AppStarted extends AuthEvent {
  const AppStarted();
}

/// 用户请求登录
final class LoginRequested extends AuthEvent {
  final String username;
  final String password;

  const LoginRequested({
    required this.username,
    required this.password,
  });
}

/// 用户请求注册
final class RegisterRequested extends AuthEvent {
  final String username;
  final String password;
  final String? displayName;

  const RegisterRequested({
    required this.username,
    required this.password,
    this.displayName,
  });
}

/// 用户选择角色（注册后的角色选择步骤）
final class RoleSelected extends AuthEvent {
  final UserRoleType role;

  const RoleSelected(this.role);
}

/// 班级码加入（学生/家长加入班级）
final class ClassCodeSubmitted extends AuthEvent {
  final String classCode;

  const ClassCodeSubmitted(this.classCode);
}

/// 用户请求登出
final class LogoutRequested extends AuthEvent {
  const LogoutRequested();
}

/// 令牌刷新成功（由拦截器触发）
final class TokenRefreshed extends AuthEvent {
  final AuthToken token;

  const TokenRefreshed(this.token);
}

/// 认证失败（由 401 拦截器触发）
final class AuthExpired extends AuthEvent {
  const AuthExpired();
}