[Crash] Unchecked this.room.censor.detect in chat message handler

[coderabbitai]

Summary

Game server crashes when this.room.censor is undefined during chat.

Affected Code

server-game/src/client.js:346

} else if (!this.room.censor.detect(text, true)) {
  // CRASH if this.room.censor is undefined

Vulnerability

If room initialization incomplete or during shutdown.

Impact

• Game server crash on chat
• Denial of service

Recommended Fix

} else if (!this.room.censor?.detect(text, true)) {

References

• PR: New Blocks & Ported fancyMuzzle flash #43