feat(NetworkConfig): add network configuration routes and validation; integrate into server and frontend for managing IP, interfaces, and gateways

frontend/src/App.jsx

@@ -31,6 +31,7 @@ import ASNsNewManager from './ASNsNewManager';
 import AutoUrlManager from './AutoUrlManager';
 import BillingManager from './BillingManager';
 import CommunitiesManager from './CommunitiesManager';
+import NetworkConfigManager from './NetworkConfigManager';
 import Dashboard from './Dashboard';
 import './App.css';
 import { NotifyProvider } from './components/NotifyProvider.jsx';
@@ -51,14 +52,14 @@ function LanguageProvider({ children }) {
       home: 'Главная', data: 'Данные', management: 'Управление', tools: 'Инструменты',
       dashboard: 'Панель', domains: 'Домены', ipRanges: 'IP-диапазоны', asns: 'AS',
       communities: 'Community', servers: 'Серверы', filters: 'Фильтры', billing: 'Биллинг', autoUrls: 'Авто URL',
-      easySwitch: 'Easy Switch',
+      easySwitch: 'Easy Switch', networkConfig: 'Сетевые настройки',
       light: 'Светлая', dark: 'Тёмная'
     },
     en: {
       home: 'Home', data: 'Data', management: 'Management', tools: 'Tools',
       dashboard: 'Dashboard', domains: 'Domains', ipRanges: 'IP Ranges', asns: 'ASNs',
       communities: 'Communities', servers: 'Servers', filters: 'Filters', billing: 'Billing', autoUrls: 'Auto URLs',
-      easySwitch: 'Easy Switch',
+      easySwitch: 'Easy Switch', networkConfig: 'Network Config',
       light: 'Light', dark: 'Dark'
     }
   };
@@ -190,6 +191,7 @@ function MainLayout() {
       items: [
         { id: 'servers', title: t('servers'), path: '/servers', icon: IconServer },
         { id: 'filters', title: t('filters'), path: '/filters', icon: IconFilter },
+        { id: 'network-config', title: t('networkConfig'), path: '/network-config', icon: IconNetwork },
         { id: 'easy-switch', title: t('easySwitch'), path: '/easy-switch', icon: IconArrowsExchange },
         { id: 'billing', title: t('billing'), path: '/billing', icon: IconCreditCard }
       ]
@@ -397,6 +399,7 @@ function MainLayout() {
           <Route path="/servers" element={<ServerManager />} />
           <Route path="/billing" element={<BillingManager />} />
           <Route path="/filters" element={<FilterManager />} />
+          <Route path="/network-config" element={<NetworkConfigManager />} />
           <Route path="/easy-switch" element={<EasySwitchManager />} />
           <Route path="/" element={<Navigate to="/dashboard" replace />} />
         </Routes>