Rename gateway proxy labels and update window title

src/web/App.jsx

@@ -25,6 +25,10 @@ function App() {
     return () => clearInterval(timer);
   }, []);
 
+  useEffect(() => {
+    if (state?.mode) document.title = state.mode === 'gateway' ? 'Gateway' : 'Proxy';
+  }, [state?.mode]);
+
   async function run(action) {
     setBusy(true);
     setError('');

src/web/components/ClientOverviewPage.jsx

@@ -225,12 +225,12 @@ export function ClientOverviewPage({
             </div>
           </div>
 
-          <section className={`client-proxies${isGateway ? ' has-tabs' : ''}`} aria-label={isGateway ? 'Gateway и Local Proxy' : 'Локальный прокси'}>
+          <section className={`client-proxies${isGateway ? ' has-tabs' : ''}`} aria-label={isGateway ? 'Gateway и Gateway Proxy' : 'Локальный прокси'}>
             {isGateway && (
               <div className="client-access-tabs" role="tablist" aria-label="Способ подключения">
                 {[
                   ['gateway', 'Gateway'],
-                  ['proxy', 'Local Proxy'],
+                  ['proxy', 'Gateway Proxy'],
                 ].map(([tab, label]) => (
                   <button
                     className={`client-access-tab${accessTab === tab ? ' is-active' : ''}`}