Kyle Isom 446b3df52d Fix WebAuthn CSRF; clarify security key UI ...

- Fix webauthn.js CSRF token: read HMAC header value from
  body hx-headers attribute instead of cookie nonce
- Update profile labels to mention security keys/FIDO2
  alongside passkeys

Security: CSRF double-submit was broken for fetch()-based
WebAuthn requests — JS was sending the cookie nonce as the
header value instead of the HMAC. Fixed by reading the
server-rendered header token from the DOM.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-03-16 19:27:44 -07:00

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