On a fresh install useAuthOnboarding's effect ran at mount before the
setup wizard's 500ms auto-open timer fired. The one-shot ref locked,
and the resolved fetch could either stack model onboarding on top of
the wizard or never re-trigger after the wizard closed.
- Gate the trigger on projectId being set so the wizard owns the
bootstrap phase; the auth check only fires once a project exists.
- Re-check setupWizardOpen via a ref when the auth fetch resolves to
avoid stacking onboarding on top of a wizard opened mid-fetch.
- Release the one-shot in that suppressed branch so the effect retries
when the wizard closes.
Adds two regression tests: fresh-install handoff and mid-fetch wizard
suppression.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>