refactor(admin): 合并管理后台并移除 apps/agent

- 平台与代理共用 apps/admin，统一登录 manage/auth/login
- 按 userType 展示菜单，修复 token 循环跳转
- 删除独立 apps/agent 前端工程

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/admin/src/api.ts

@@ -1,9 +1,30 @@
 import axios from 'axios';
+import router from './router';
+import { clearStaffSession } from './stores/auth';
 
 const api = axios.create({ baseURL: '/api' });
-api.interceptors.request.use((c) => {
-  const t = localStorage.getItem('admin_token');
-  if (t) c.headers.Authorization = `Bearer ${t}`;
-  return c;
+
+let handling401 = false;
+
+api.interceptors.request.use((config) => {
+  const t = localStorage.getItem('manage_token');
+  if (t) config.headers.Authorization = `Bearer ${t}`;
+  return config;
 });
+
+api.interceptors.response.use(
+  (res) => res,
+  async (err) => {
+    if (err.response?.status === 401 && !handling401) {
+      handling401 = true;
+      clearStaffSession();
+      if (router.currentRoute.value.path !== '/login') {
+        await router.replace('/login');
+      }
+      handling401 = false;
+    }
+    return Promise.reject(err);
+  },
+);
+
 export default api;