feat: Enhance server security and performance by adding helmet for security headers, implementing rate limiting, and centralizing error handling; update frontend API calls to use a dedicated api module for consistency

frontend/src/AutoUrlManager.jsx

@@ -1,5 +1,5 @@
 import { useState, useEffect } from 'react';
-import axios from 'axios';
+import api from './lib/api.js';
 import {
   IconPlus,
   IconTrash,
@@ -30,7 +30,7 @@ function AutoUrlManager() {
   const fetchUrls = async () => {
     try {
       setLoading(true);
-      const response = await axios.get('/api/auto-urls');
+      const response = await api.get('/auto-urls');
       setUrls(response.data);
     } catch (error) {
       console.error('Error fetching URLs:', error);
@@ -91,7 +91,7 @@ function AutoUrlManager() {
         return;
       }
 
-      await axios.post('/api/auto-urls', { urls: validUrls });
+      await api.post('/auto-urls', { urls: validUrls });
       setUrls(validUrls);
       setMessage('URL-адреса сохранены успешно');
       setMessageType('success');
@@ -109,7 +109,7 @@ function AutoUrlManager() {
       setProcessing(true);
       setMessage('');
       
-      const response = await axios.post('/api/auto-urls/process');
+      const response = await api.post('/auto-urls/process');
       setMessage(response.data.message);
       setMessageType('success');
     } catch (error) {