Diff view shows "No diff data" until file is clicked again

What version of the VS Code extension are you using?

0.4.68

What subscription do you have?

Plus

Which IDE are you using?

VS Code

What platform is your computer?

Windows 11 with WSL2 Ubuntu

What issue are you seeing?

When viewing diffs in the Codex diff panel, it shows "No diff data" even when there are uncommitted changes.

The diff only appears after clicking on the file again in the file list. The view does not auto-refresh when file changes occur.

What steps can reproduce the bug?

1. Make changes to a file
2. Open Codex diff view
3. Shows "No diff data"
4. Click on the file in the list
5. Now the diff appears

What is the expected behavior?

Diff should show automatically without needing to click again.

Additional information

_No response_