feat: implement team registration management feature with backend API and frontend UI.

frontend/src/components/layout/Sidebar.tsx

@@ -14,6 +14,7 @@ import {
   Mail,
   Cog,
   Trash2,
+  UserPlus,
 } from 'lucide-react'
 
 interface SidebarProps {
@@ -35,6 +36,7 @@ const navItems: NavItem[] = [
   { to: '/accounts', icon: Users, label: '号池账号' },
   { to: '/monitor', icon: Activity, label: '号池监控' },
   { to: '/cleaner', icon: Trash2, label: '定期清理' },
+  { to: '/team-reg', icon: UserPlus, label: 'Team 注册' },
   {
     to: '/config',
     icon: Settings,