[BUG] Multiple border lines misaligned in the code execution panel

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?

I am experiencing a display issue with the Claude Code execution/result panel.
The border lines inside the panel become misaligned, duplicated, or rendered unevenly, as shown in the attached screenshot.
Normally, the panel should display only a single top and bottom border line, but after running project tests, multiple horizontal lines appear and the layout becomes visually inconsistent.

I am using Windows 11. When I log in to Claude Code for the first time, everything displays normally. However, after running tests on my project, the border lines inside the execution/result panel become misaligned or duplicated, as shown in the attached screenshot.

What Should Happen?

The cursor should stay aligned with the text input area and move correctly along the typed characters.

Error Messages/Logs

Steps to Reproduce

-Open the Claude Code (VSCODE) interface
-Run a command or allow Claude to generate a command in the execution panel
-After the execution panel updates, observe the border lines inside the command box
-The panel displays multiple horizontal lines, duplicated or misaligned
-The top and bottom borders are no longer a single clean line, causing the layout to appear visually broken

Claude Model

None

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.0.44 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

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