Follow-up to molecule-controlplane#485. The first half of #2913 wired
a Sign-out button + signOut() helper that POSTed /cp/auth/signout, but
clicking still left the user signed in: WorkOS's browser cookie
preserved the SSO session, /cp/auth/login auto-re-authed via SSO, and
the user landed back on /orgs.
CP PR #485 returns the AuthKit hosted logout URL in the signout
response. This change has signOut() navigate the browser there
instead of /cp/auth/login. AuthKit clears its cookie + redirects to
return_to (configured server-side from APP_URL) → next /cp/auth/login
hits a fresh AuthKit, no SSO session, login form actually shows.
Defensive parsing: malformed JSON, missing logout_url, or wrong-type
logout_url all fall through to the legacy /cp/auth/login fallback,
which works locally (DisabledProvider, dev) where there's no SSO to
escape.
Forward-compat: when CP doesn't have #485 deployed yet, signOut()
sees logout_url="" or missing → fallback fires. Order of merge
between this and #485 doesn't matter, but the bug isn't actually
fixed end-to-end until both ship.
Tests added (3 new, 15 total auth.test.ts):
- Hosted logout: navigates to logout_url when response includes one.
- DisabledProvider path: falls back to /cp/auth/login when "".
- Defensive: malformed JSON body → fallback (no crash).
- Defensive: non-string logout_url → fallback (no open redirect).
Verified:
- npx vitest run src/lib/__tests__/auth.test.ts — 15/15 pass
- tsc --noEmit clean
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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