优化客户端请求机制

src/lib/api.ts

@@ -1,7 +1,15 @@
 // 定义后端服务URL和OAuth2配置
-const API_BASE_URL = process.env.NEXT_PUBLIC_API_BASE_URL
-const CLIENT_ID = process.env.CLIENT_ID
-const CLIENT_SECRET = process.env.CLIENT_SECRET
+const _api_base_url = process.env.NEXT_PUBLIC_API_BASE_URL
+if (!_api_base_url) throw new Error('NEXT_PUBLIC_API_BASE_URL is not set')
+const API_BASE_URL = _api_base_url
+
+const _client_id = process.env.CLIENT_ID
+if (!_client_id) throw new Error('CLIENT_ID is not set')
+const CLIENT_ID = _client_id
+
+const _client_secret = process.env.CLIENT_SECRET
+if (!_client_secret) throw new Error('CLIENT_SECRET is not set')
+const CLIENT_SECRET = _client_secret
 
 // 统一的API响应类型
 type ApiResponse<T = undefined> = {