sing-song-app/app/main.tsx

import { View, Text, StyleSheet } from 'react-native';

export default function MainScreen() {
  return (
    <View style={styles.container}>
      <Text style={styles.text}>🎉 메인 화면입니다 (게스트 진입 완료)</Text>
    </View>
  );
}

const styles = StyleSheet.create({
  container: { flex: 1, justifyContent: 'center', alignItems: 'center' },
  text: { fontSize: 20, fontWeight: 'bold' },
});