Hand off option missing on worktree threads

What version of the Codex App are you using (From “About Codex” dialog)?

Version 26.305.950 (863)

What subscription do you have?

Plus

What platform is your computer?

Darwin 24.6.0 arm64 arm (macOS 15.7.4)

What issue are you seeing?

Since the most-recent update the "Hand off" button is only shown on local threads. When a thread is started in a new worktree the button disappears and is replaced by "Create branch". I have looked everywhere and there does not seem to be a convenient way to copy the agent's worktree to the local checkout anymore.

This effects both new worktree threads created since the update and existing threads created before the update (when the hand off button was present).

This does not appear to be intentional, the documentation still describes the old workflow.

What steps can reproduce the bug?

Start a new thread in local, these buttons will appear in the top right:

<img width="707" height="59" alt="Image" src="https://github.com/user-attachments/assets/9302a896-ba2f-48c8-a1de-8eb5a9876d0f" />

Start a new thread in a new worktree, these buttons appear instead (hand off is missing):

<img width="707" height="59" alt="Image" src="https://github.com/user-attachments/assets/a57ec690-100f-43da-a5c1-da9f23e78756" />

What is the expected behavior?

The hand off button should be present, as described in the documentation. It should be possible to have the agent work in its own isolated worktree, hand off to local to see the changes in a local dev server, etc.

Additional information

_No response_