- Coerce refresh_expires_in to int before arithmetic in both callback
paths so IdPs that serialize the field as a JSON string (e.g. AWS
Cognito) don't trigger an unhandled TypeError 500.
- Drop the orphaned oauth_session row written by _check_logged_in. The
canonical Flow 2 row is created by generate_oauth_url_for_flow2 keyed
by `state`, which is what the unified callback looks up; the
flow2_<hex> session_id was never matched and just churned the table
for 10 minutes per call.
- Match delete_cookie attributes (httponly, secure, samesite) to the
set_cookie call on logout so browsers reliably evict the cookie even
on implementations that consider security flags during deletion.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
