xiaoshu-app/src/app/admin/admin.guard.ts

import { inject } from '@angular/core';
import { CanActivateFn, Router } from '@angular/router';
import { AdminSessionService } from './admin-session.service';

export const adminGuard: CanActivateFn = (_route, state) => {
  const sessions = inject(AdminSessionService);
  if (sessions.isAuthenticated()) return true;
  return inject(Router).createUrlTree(['/admin/login'], { queryParams: { returnUrl: state.url } });
};