chore: check for updates every 5 minutes (was 10)

frontend/src/App.tsx

@@ -1167,7 +1167,7 @@ export default function App() {
   const [updating, setUpdating] = useState(false);
   const [updateProgress, setUpdateProgress] = useState(0);
   const [updateError, setUpdateError] = useState('');
-  // Check GitHub for a newer release at startup AND every 10 minutes (unless
+  // Check GitHub for a newer release at startup AND every 5 minutes (unless
   // disabled in General). Best effort — silent on failure.
   useEffect(() => {
     if (localStorage.getItem('opslog.checkUpdates') === '0') return;
@@ -1175,7 +1175,7 @@ export default function App() {
       if (u?.available && u?.latest) setUpdateInfo({ latest: String(u.latest), url: String(u.url ?? ''), downloadUrl: String(u.download_url ?? '') });
     }).catch(() => {});
     check();
-    const id = window.setInterval(check, 10 * 60 * 1000);
+    const id = window.setInterval(check, 5 * 60 * 1000);
     return () => window.clearInterval(id);
   }, []);
   // Live download progress for the in-app updater.