Codex VS Code Branch details popover causes horizontal scrollbar

What version of the IDE extension are you using?

openai.chatgpt 26.506.31421

What subscription do you have?

Plus

Which IDE are you using?

VS Code 1.119.1
Commit: 974500e64f0d1cfdf7c9821a2a51c2cb3bf0e561

What platform is your computer?

Linux 6.17.0-23-generic x86_64 x86_64

What issue are you seeing?

After a recent update, the Codex VS Code panel started showing an
unwanted horizontal scrollbar.

The UI is still usable, but opening the Branch details popover from the
composer/status area appears to make the Codex webview wider than the
available panel width. The panel can then be scrolled sideways.

The popover contains entries like Changes, Git actions, GitHub CLI
status, and Sources / Web search.

Screenshot attached.

What steps can reproduce the bug?

1. Open the Codex extension in VS Code.
2. Open a local Codex thread in a Git repository.
3. Click the Branch details control in the composer/status area.
4. Observe that the Codex panel gets a horizontal scrollbar and can be

scrolled sideways while the popover is open.

What is the expected behavior?

Opening the Branch details popover should not cause horizontal overflow.
The popover should fit within the available webview width or be
positioned without increasing the page scroll width.

Additional information

I searched existing issues and did not find an exact report for this.

This is not a blocking issue; the UI remains usable, but the extra
scrollbar is annoying.

I tried changing chat.viewSessions.orientation between stacked and
sideBySide; it did not help.

I tried reverting to older Codex extension versions, but the issue
persisted.

<img width="783" height="444" alt="Image" src="https://github.com/user-attachments/assets/c8a53168-53ab-4736-bddb-2f9181d19387" />