feat: 新增 API 服务，提供 HTTP 请求、认证刷新和错误处理功能

src/services/api.ts

@@ -4,7 +4,10 @@
  * Validates: Requirements 12.3, 12.4
  */
 
-const API_BASE_URL = import.meta.env.VITE_API_BASE_URL || 'http://localhost:2612/api/v1';
+const isLocal = window.location.hostname === 'localhost' || window.location.hostname === '127.0.0.1';
+const API_BASE_URL = isLocal
+  ? (import.meta.env.VITE_API_BASE_URL || 'http://localhost:2612/api/v1')
+  : '/api/v1';
 
 // Token storage keys
 const ACCESS_TOKEN_KEY = 'access_token';
@@ -52,7 +55,15 @@ function buildUrl(
   endpoint: string,
   params?: Record<string, string | number | boolean | undefined>
 ): string {
-  const url = new URL(`${API_BASE_URL}${endpoint}`);
+  // 处理相对路径问题
+  let fullUrlString;
+  if (API_BASE_URL.startsWith('/')) {
+    fullUrlString = `${window.location.origin}${API_BASE_URL}${endpoint}`;
+  } else {
+    fullUrlString = `${API_BASE_URL}${endpoint}`;
+  }
+
+  const url = new URL(fullUrlString);
   if (params) {
     Object.entries(params).forEach(([key, value]) => {
       if (value !== undefined) {