Improve Codex App image viewer with arrow-key navigation and reliable Copy Image

[maxmilneaus]

What variant of Codex are you using?

Codex App - Version 26.429.30905 (2345)

What feature would you like to see?

When viewing generated images in the Codex App chat interface, clicking an image already opens it in a maximised viewer. It would be useful if that viewer also supported moving between generated images with the keyboard:

• Left arrow: show the previous generated image in the current thread/conversation
• Right arrow: show the next generated image in the current thread/conversation
• Keep the current click-to-maximise behavior

It would also help if copying generated images from the app were more reliable. In practice, right-clicking an image and choosing copy frequently does not appear to put the image on the clipboard, so pasting into another app often fails. Expected behavior is that Copy Image reliably writes the selected/generated image to the system clipboard, or otherwise exposes a clear fallback action when the app cannot do that.

Additional information

I searched existing open and closed issues for combinations of:

• image viewer / lightbox / maximized image
• generated images + keyboard navigation / arrow keys
• right-click copy image / copy generated image

I found several related clipboard/image issues, but they appear to be about pasting images into Codex CLI or other surfaces rather than navigating/copying generated images from the Codex App chat viewer.