[BUG] theme problem in Ruby

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 I use Ruby code the coloring of code not working in lokal charset

for example
1 - attr_accessor :aktualny_dział
1 + attr_accessor :aktualny_dział , :super
colored is "aktualny_dzia" not "aktualny_dział"

<img width="617" height="90" alt="Image" src="https://github.com/user-attachments/assets/697f54f1-d52e-465b-9bb9-609d608b1193" />

What Should Happen?

wwwww

Error Messages/Logs

Steps to Reproduce

CLI

Claude Model

Other

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

last

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_