feat: update backend

frontend/admin/src/api/httpClient.js

@@ -0,0 +1,48 @@
+import axios from 'axios';
+
+// Create axios instance with default config
+const httpClient = axios.create({
+    baseURL: '/api',
+    timeout: 10000,
+    headers: {
+        'Content-Type': 'application/json',
+    }
+});
+
+// Request interceptor
+httpClient.interceptors.request.use(
+    config => {
+        // You can add auth token here if needed
+        // const token = localStorage.getItem('token');
+        // if (token) {
+        //   config.headers.Authorization = `Bearer ${token}`;
+        // }
+        return config;
+    },
+    error => {
+        return Promise.reject(error);
+    }
+);
+
+// Response interceptor
+httpClient.interceptors.response.use(
+    response => {
+        return response.data;
+    },
+    error => {
+        // Handle HTTP errors here
+        if (error.response) {
+            // Server responded with error status
+            console.error('API Error:', error.response.status, error.response.data);
+        } else if (error.request) {
+            // Request made but no response received
+            console.error('API Error: No response received', error.request);
+        } else {
+            // Something else happened
+            console.error('API Error:', error.message);
+        }
+        return Promise.reject(error);
+    }
+);
+
+export default httpClient;