[Windows app] Right panel tabs collapse to a few pixels and become unclickable

What version of the Codex App are you using (From “About Codex” dialog)?

26.911.7940.0 (x64)

What subscription do you have?

ChatGPT individual plan (exact tier not shown in this workflow)

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64 (Windows 11 25H2, build 26200.9457)

What issue are you seeing?

When multiple right-panel tabs are open (for example Review, a local README.md file, and an in-app browser tab), tabs after the first visible tabs collapse into a few-pixel-wide slivers. The collapsed tabs cannot be selected by clicking, even though the underlying in-app browser tab remains loaded.

There is no visible horizontal scrollbar or overflow menu for reaching the hidden tabs. Closing visible tabs or invoking the browser shortcut can temporarily expose the browser tab.

What steps can reproduce the bug?

1. Open a Codex task in the Windows desktop app.
2. Open the Review panel.
3. Open a local Markdown file in the right panel.
4. Open an in-app browser tab in the same right panel.
5. Observe the tab strip at the top of the right panel.
6. Try to click one of the narrow tab slivers.

Result: the later tabs are only a few pixels wide and cannot be activated with the mouse.

What is the expected behavior?

Every open tab should remain accessible. The tab strip should retain a usable minimum tab width, provide horizontal scrolling, or show an overflow menu when space runs out.

Additional information

The attached screenshot has personal information redacted. The screenshot shows the Review tab and README.md tab at usable widths, followed by multiple narrow tab slivers that cannot be clicked.

The in-app browser backend reported only one browser tab, so the visible slivers appear to be mixed Codex right-panel tabs (review/file/browser), rather than duplicate browser tabs.

Display: maximized Codex window on a 1920×1080-class display.

Reproduce the issue in the Windows desktop app using the listed sequence with Review, a local README.md file, and an in-app browser tab open in the right panel. Trace the right-panel tab strip behavior and verify that every open tab remains selectable at a usable width, through scrolling, or via an overflow menu.