fix(tarko-agent-ui): restore container and navbar in replay mode

Replay mode was missing the outer container with proper height
control and background styling, and the Navbar component.
This caused layout issues where the UI didn't fill the screen
properly in replay mode.

Fixes the height control issue introduced in PR #1553.

Author: ulivz

multimodal/tarko/agent-ui/src/standalone/app/App.tsx

@@ -42,7 +42,15 @@ export const App: React.FC = () => {
 
   if (isReplayMode) {
     console.log('[ReplayMode] Rendering replay layout directly');
-    return <Layout isReplayMode={true} />;
+    return (
+      <div className="flex h-screen bg-[#F2F3F5] dark:bg-gray-900 text-gray-900 dark:text-gray-100 overflow-hidden">
+        <Sidebar />
+        <div className="flex-1 flex flex-col overflow-hidden">
+          <Navbar />
+          <Layout isReplayMode={true} />
+        </div>
+      </div>
+    );
   }
 
   return (