🛠️ Task: Join Room with Password

[rluders]

📌 Goal

Require password when joining protected rooms.

🧱 Scope

• Add optional password to join_room
• Validate on server

🎯 Requirements

• Reject invalid password
• Return clear error message

output

• { type: "error", message: "invalid password" }

✅ Done when

• Protected rooms require correct password