Codex Desktop forces fullscreen content whenever switching images from the Files sidebar

Codex App version

26.901.4073.0

Platform

Microsoft Windows 10, version 10.0.19045.6466, x64

What issue are you seeing?

When switching between image files from the Files sidebar, every image selection expands the image/content panel to fullscreen. After manually restoring split view so the chat remains visible, selecting another image from the Files sidebar forces fullscreen content again.

This makes reviewing multiple image assets cumbersome because the user must exit fullscreen after every selection.

Steps to reproduce

1. Open a local project containing multiple image files.
2. Open the Files sidebar.
3. Select an image.
4. Restore the workspace to split view so both the chat and image panel are visible.
5. Select a different image from the Files sidebar.

Actual behavior

The image/content panel returns to fullscreen on every image selection.

Expected behavior

Opening or switching images should preserve the current workspace layout. The viewer should enter fullscreen only after an explicit user action.

Additional information

The persisted workspace topology correctly records rightPanelFullWidth: false after split view is restored, but the next image selection overrides it and returns the content panel to fullscreen. No user-facing setting appears to disable this behavior.

Workaround: press Ctrl+Shift+B after each image selection to return to split view.

Reproduce the image-switching flow on Windows with the Files sidebar, then trace where the persisted rightPanelFullWidth: false state is overridden after selecting an image. Done means switching images preserves split view and fullscreen occurs only after an explicit user action; verify the Ctrl+Shift+B workaround is no longer needed.