feat: add admin login

frontend/admin/src/api/authService.js

@@ -1,7 +1,7 @@
-import { http } from '@/utils/http';
+import httpClient from './httpClient';
 
 export const authService = {
     login(username, password) {
-        return http.post('/admin/auth/login', { username, password });
+        return httpClient.post('/admin/auth', { username, password });
     },
 };