Codex edit approval overlay becomes unreadable when chat is scrolled over previous messages

What version of the IDE extension are you using?

26.406.31014

What subscription do you have?

ChatGPT Plus

Which IDE are you using?

Cursor

What platform is your computer?

Linux 6.17.0-20-generic x86_64 x86_64

What issue are you seeing?

<img width="744" height="525" alt="Image" src="https://github.com/user-attachments/assets/e4616cfb-ee15-4a33-b240-809d91166302" />
When Codex requests approval for an edit, the approval UI/backdrop does not properly isolate itself from the existing chat content behind it. If I scroll up to view previous responses while the edit approval request is visible, the approval request and the older chat text visually overlap and mix together, making the proposed edit and approval prompt unreadable.

What steps can reproduce the bug?

1. Use the Codex extension in Cursor.
2. Trigger a code edit that requires approval.
3. While the approval UI is visible, scroll upward in the chat to view earlier messages.
4. Observe that the approval overlay and previous chat content overlap visually.

What is the expected behavior?

the edit approval request should appear on a clearly readable surface

Additional information

_No response_