82e2593332
Previous logout fired fetch(end_session, {mode:'no-cors'}), which is a
no-op for OIDC: cross-origin fetch never clears the IdP's session cookie.
Result: subsequent SSO clicks silently re-authenticated the prior user.
New flow:
1. Best-effort POST /auth/logout to bump token_revoked_before.
2. Clear localStorage + Zustand state.
3. Set sessionStorage 'cameleer:signed_out=1' so /login renders a
confirmation splash (mirrors cameleer-saas pattern).
4. window.location.replace(end_session_endpoint?id_token_hint=...
&post_logout_redirect_uri=...&client_id=...) — top-level navigation,
the only form that actually clears the IdP session cookie.
client_id is now persisted at OIDC initiation alongside
end_session_endpoint and id_token, so logout has all three params
without an extra round-trip.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>