Add runtime version reporting and display

src/web/App.jsx

@@ -20,6 +20,7 @@ function App() {
   const [subscriptionUrl, setSubscriptionUrl] = useState('');
   const [operations, setOperations] = useState({});
   const [error, setError] = useState(null);
+  const [versionInfo, setVersionInfo] = useState(null);
   const pollGeneration = useRef(0);
   const operationRegistry = useRef(null);
   if (!operationRegistry.current) {
@@ -56,6 +57,17 @@ function App() {
     return () => clearInterval(timer);
   }, []);
 
+  useEffect(() => {
+    let cancelled = false;
+    api.version().then((info) => {
+      if (!cancelled) setVersionInfo(info);
+    }).catch((requestError) => {
+      console.warn(`[version] Не удалось получить runtime-версию: ${requestError.message}`);
+      if (!cancelled) setVersionInfo(null);
+    });
+    return () => { cancelled = true; };
+  }, []);
+
   useEffect(() => {
     if (!state?.mode) return;
     const isGateway = state.mode === 'gateway';
@@ -129,6 +141,7 @@ function App() {
         <main className="app-main">
           <ClientOverviewPage
             state={previewReady ? { ...state, mode: 'client', hasSubscription: true, subscriptionHost: 'harbor.example', selectedTag: 'Amsterdam', proxyPort: 8082 } : state}
+            versionInfo={versionInfo}
             operations={operations}
             error={error}
             subscriptionUrl={subscriptionUrl}