Lobby.tsx에 화면 전환 훅 추가

Author: AndroidNetrunner

src/app/Lobby/Lobby.tsx

@@ -22,6 +22,18 @@ export default function Lobby() {
     const userRef = ref(db, 'rooms/' + invitationCode + '/players/' + myUserId);
     void onDisconnect(userRef).remove();
   }, []);
+  useEffect(() => {
+    if (!invitationCode) return;
+    const roomRef = ref(db, 'rooms/' + invitationCode);
+    const unsubscribe = onValue(roomRef, (snapshot) => {
+      const roomData = snapshot.val();
+      if (roomData && roomData.status === 'playing')
+        router.push(`/game/${invitationCode}`);
+    });
+    return () => {
+      unsubscribe();
+    };
+  }, [invitationCode, router]);
   return (
     <Container component="main" maxWidth="xs">
       <Box