The "Open Folder on a non-repo path" widget test wedged the runner ~10
minutes on a _RawReceivePort teardown hang. Root cause: project
validation shelled out to `git rev-parse` via Process.run, whose exit
ReceivePort leaks under the fake-async widget-test harness.
The KernelFixture now injects a pure-Dart `.git`-walk validator
(synchronous existsSync/typeSync, no native port), so the open-folder
flow is subprocess-free. Un-skipped the test and scoped the switcher
tap to the hat-bar ClideTappable to disambiguate it from the welcome
overlay's "clide" wordmark.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8
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