The heph-pwa browser login (hephaestus PR #9) uses Authorization Code + PKCE,
which redirects back to the app origin. Register https://heph.ops.eblu.me/ (and
http://localhost:8787/ for dev) on the heph provider; Authentik also keys
token-endpoint CORS off these origins.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>