test(gui): remote-link Add child focus-restore case is flaky on macOS #7611

Client or integration

OpenCodex dashboard

Area

Dashboard

Summary

gui/tests/remote-link.test.tsx case "discovery loading, empty setup and rescan retain keyboard-accessible manual entry" is flaky on macOS. After the Add child sheet is cancelled, focus is expected to return to the "Add child" button, but document.activeElement text is sometimes empty. This predates the 2.92.0 train (it fails more often on v2.91.0) and was found during 2.92.0 release-candidate verification at dev 03bcf78. Not release-blocking; CI was green on that head.

Reproduction

cd gui
for i in $(seq 1 20); do bun test --isolate tests/remote-link.test.tsx 2>&1 | grep -q '^ *0 fail$' || echo fail; done | wc -l

Run with the pinned test runner (Bun 1.4.3). Measured failures: 13/20 at dev 03bcf78 and 18/20 at v2.91.0. Also failed once in a full bun run test from gui/ (3492 pass / 1 fail).

Expected: the cancel handler restores focus to the "Add child" trigger every run.
Actual: intermittently no focused element at the assertion at gui/tests/remote-link.test.tsx:931.

Version

dev @ 03bcf78 (2.92.0 candidate); also v2.91.0

Operating system

macOS (arm64)

Provider and model

N/A

Logs or error output

error: expect(received).toContain(expected)
Expected to contain: "Add child"
Received: ""
      at gui/tests/remote-link.test.tsx:931:51
(fail) discovery loading, empty setup and rescan retain keyboard-accessible manual entry

The run prints "An update to FallbackPanel inside a test was not wrapped in act(...)" just before the failure, which suggests focus restore depends on async state settling after the assertion.

Screenshots and supporting files

No response

Redacted configuration

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