[BUG] welcome window do not show box edge

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?

now when i launch my claude code cli，welcom box do not show the edge , all like this:
<img width="474" height="80" alt="Image" src="https://github.com/user-attachments/assets/cf059d91-71df-4a83-9468-f064e1332887" />

What Should Happen?

now when i launch my claude code cli，welcom box do not show the edge

Error Messages/Logs

now when i launch my claude code cli，welcom box do not show the edge

Steps to Reproduce

now when i launch my claude code cli，welcom box do not show the edge

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

v2.1.90

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_