- Fix "Cannot use Ref after disposed" error in OIDC callback page - Store notifier reference before async gap - Add mounted check at start of processing - Add proper SSO logout via Authentik end_session_endpoint - Clears local tokens AND redirects to Authentik logout - Returns to app after Authentik session ends 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>