Room 접속 시 nickname 설정이 되어있지 않아 Anon이라는 기본 닉네임으로 접속됨

Room 접속하기 전에 nickname 설정이 필요함

Look for the room connection logic and the nickname handling in the frontend code. The issue suggests adding a nickname setting step before joining a room. Check for existing UI components for user input and modify the connection flow to require a nickname. Test by joining a room and verifying the nickname is used instead of 'Anon'.

索引モデルが issue の本文から書いたものです。