"Ran X commands" label expansion is unstable and unpredictable (regression)

What version of the IDE extension are you using?

26.406.31014

What subscription do you have?

Plus

Which IDE are you using?

VS Code

What platform is your computer?

Microsoft Windows NT 10.0.26100.0 x64

What issue are you seeing?

The "Ran X commands" summary rows can no longer be reliably expanded by clicking on them. See the attached screencast; left mouse button clicks are highlighted.

https://github.com/user-attachments/assets/29cdc552-dd38-4f00-9dd8-17d56e24484f

What steps can reproduce the bug?

1. Run a Codex task in chat that makes Codex execute multiple commands in a row, then wait until the task is finished.
2. Expand "Worked for Xm Ys".
3. Try to expand command groups such as "Ran 1 command" or "Ran 1 command, called 7 tools".
4. Notice that expanding them is almost impossible: most clicks do nothing, and then it suddenly works for no obvious reason.

What is the expected behavior?

Normal, predictable expand behavior when clicking "Ran 1 command" or "Ran 1 command, called 7 tools", so the list of executed commands or used tools is shown consistently.

Additional information

This UI regression makes it impossible to work with Codex reliably in the VS Code extension, because we can no longer inspect what Codex actually did.