[BUG] /btw side chat opens as regular message instead of overlay

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

/btw command and Ctrl+; shortcut do not open the side chat overlay. Instead, the message is sent as a regular message in the main thread.

What Should Happen?

A side chat overlay should open, isolated from the main conversation.

Error Messages/Logs

Steps to Reproduce

1. Open Code tab in Claude Desktop
2. Open a project folder and start a session
3. Type /btw test in the prompt box and press Enter
4. Message is sent as a regular chat message instead of opening side chat
5. Ctrl+; also does not open side chat (only zooms the display)

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

1.11187.4 (584005)

Platform

Other

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

<img width="687" height="160" alt="Image" src="https://github.com/user-attachments/assets/e60b361e-4360-4c89-91cc-b36920486bee" />

<img width="545" height="145" alt="Image" src="https://github.com/user-attachments/assets/2fc3b4c3-aac7-481e-ab46-ba2a236f8594" />

<img width="548" height="152" alt="Image" src="https://github.com/user-attachments/assets/22001677-566d-4d2f-b023-db088d63e234" />

<img width="672" height="486" alt="Image" src="https://github.com/user-attachments/assets/d63e60ef-4c43-4595-9bf8-a8c0579c9dea" />