[BUG] Ctrl+B doesn't work natively on Windows (powershell)

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?

Ctrl+B (launch task in background) doesn't work on Windows. Neither in the bash mode (!) nor in the permission request dialog.

What Should Happen?

Ctrl+B combination runs the command in the background in all supported cases as stated in the CC docs.

Error Messages/Logs

Steps to Reproduce

1. run claude in interactive mode
2. ask it to run some command, in the permission screen press ctrl+b - nothing happens

1. run claude code in interactive mode
2. enable bash mode (!) - type a command, press ctrl+b - nothing happens

Claude Model

Other

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.0.5 (Claude Code)

Platform

Other

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

Running CC in PowershellCode in WIndows Terminal.