[Bug]: Switching branch sometimes silently does nothing #32029

Area

apps/desktop

Steps to reproduce

1. Open a thread in a git project in the T3 Code desktop app.
2. Open the branch picker and select another existing branch.
3. Repeat a few times with different branches.

Expected behavior

The thread's checkout switches to the selected branch and the UI shows the new branch.

Actual behavior

Sometimes nothing happens: the picker closes, but the thread stays on the old branch and no error or toast is shown. It is intermittent — retrying sometimes works.

Impact

Major degradation or frequent failure

Version or commit

T3 Code (Beta) 0.1.3

Environment

macOS 27.0.1, desktop app

Notes

Possibly related to #22245 / #30368 (branch switch timeouts), but here there is no visible timeout or error at all — the switch silently does nothing.