- Register and login by mobile number; email is now an optional
contact field only (never used to authenticate)
- After registration, the phone is verified via a 6-digit SMS code
- Login supports both password and one-time-code (OTP) methods
- Phone OTP delivered via Kavenegar (verify/lookup); API key in env
- Account page: edit name/optional email, change password, and
change mobile number with OTP re-verification
- Codes are hashed, expire in 5m, capped at 5 attempts, rate-limited
- Seed gives the admin a verified phone so mobile login still works
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>