初步增加 web 界面

web/frontend/src/api/index.ts

@@ -0,0 +1,31 @@
+import axios from 'axios';
+
+const api = axios.create({
+  baseURL: '/api',
+  timeout: 30000,
+});
+
+// 请求拦截：携带 token
+api.interceptors.request.use((config) => {
+  const token = localStorage.getItem('token');
+  if (token) {
+    config.headers.Authorization = `Bearer ${token}`;
+  }
+  return config;
+});
+
+// 响应拦截：统一错误处理
+api.interceptors.response.use(
+  (response) => response.data,
+  (error) => {
+    if (error.response?.status === 401) {
+      localStorage.removeItem('token');
+      localStorage.removeItem('user');
+      window.location.href = '/login';
+    }
+    const msg = error.response?.data?.detail || error.message || '请求失败';
+    return Promise.reject(new Error(msg));
+  }
+);
+
+export default api;