[BUG] `AskUserQuestion` UI disappears without ability to respawn it when moving the VS Code's Claude Code extension's chat tab into a new window

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?

AUQ covers up the chat too much, so it's hard to read Claude's response before making the choice in AUQ.
(Which, by the way, is related to another issue item: https://github.com/anthropics/claude-code/issues/47305 )

I right clicked on the chat's tab label and chose Move to the new window to give more visual real estate around the AUQ UI, but now the AUQ UI is completely gone and the agent is paused in an incomplete state.

<img width="1214" height="126" alt="Image" src="https://github.com/user-attachments/assets/c7112b17-9c7e-465d-8da9-6ad18d35a131" />

What Should Happen?

THe AUQ UI should respawn after you move the chat into its own window.

Error Messages/Logs

Steps to Reproduce

1. Trigger AskUserQuestion interface while the chat is a tab within VS Code's main window
2. Right click chat's labell
3. Left-click Move to the new window
4. Chat moves into a new window, yet AUQ is now gone.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.149 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_