Worktree creation browse submenu closes when the prompt re-renders

[QiushiZhao]

What happened?

While creating a new worktree, opening the "Base ref" or "Upstream" browse menu and drilling into a nested submenu (e.g. remote → namespace → branch) closes the submenu whenever the prompt's ancestors re-evaluate. I expected the open submenu to stay open until I dismiss it.

Steps to reproduce

1. Open the worktree creation prompt.
2. In the "Base ref" or "Upstream" field, click the browse menu and drill into a nested submenu.
3. While a submenu is open, trigger a sheet re-render — an agent-presence update, or typing in the branch-name field.
4. The open submenu closes immediately.

Supacode version and build: Local dev build (current main, past v0.10.8)

macOS version: 26.6

System locale: en_SG

Mac hardware: Apple M5 Max (arm64)

Relevant logs or screenshots: n/a

• I intend to open a pull request once this is confirmed and marked ready.
• I searched existing issues and this is not a duplicate.
• I am on the latest available version of Supacode.
• I understand pull requests are closed until the issue is marked ready.
• I agree to follow this project's Code of Conduct.

[github-actions]

Thank you for filing this. A maintainer will review it and follow up here.

Please do not start any work or open a pull request until this issue is labeled ready. That label is a maintainer's go-ahead: a pull request opened against an issue that is not yet ready is labeled invalid until then. You will get a comment here the moment it is marked ready.

See CONTRIBUTING.md for the full flow.

[github-actions]

Thanks for your patience. This is approved and marked ready, so it is now open for a pull request. If you'd like to work on it, open a pull request and link it with Closes #771 in the description. If the issue is assigned to someone, it is reserved for them; otherwise anyone is welcome to pick it up.

See CONTRIBUTING.md for the full flow.