[BUG] File reference @-sign in Nordic layout not working

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?

When trying to enter @-sign to reference files in Claude Code CLI, keybinding doesn't function (AltGr+2), I can copy @-sign in to the prompt area, but can't manually write it. (Entering the @-sign outside of claude code in the terminal works before and after opening/closing Claude)

Keybinding

CC Version: 2.1.90
Running Claude Code inside WSL2 using Windows Terminal Preview 1.25.622.0
Keyboard layout: Nordic (Sweden)

What Should Happen?

Should be able to enter '@'-character

Error Messages/Logs

Steps to Reproduce

1. Open Claude
2. Attempt to write character '@' with AltGr+2

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.90

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

WSL (Windows Subsystem for Linux)

Additional Information

_No response_