fix(voice): keep LiveKit TTS tracks alive

examples/livekit-gemini-hacker-starter/frontend/app/page.tsx

@@ -0,0 +1,10 @@
+import { headers } from 'next/headers';
+import { App } from '@/components/app/app';
+import { getAppConfig } from '@/lib/utils';
+
+export default async function Page() {
+  const hdrs = await headers();
+  const appConfig = await getAppConfig(hdrs);
+
+  return <App appConfig={appConfig} />;
+}