Replace username-based admin bootstrap with a one-time setup secret, rate-limit login/register, equalize login bcrypt timing, cap passwords at 72 bytes, destroy sessions on logout, and require Secure cookies when PORT is set.
Address PR review findings: renew session tokens on auth, sniff/re-encode avatars, serialize last-admin checks, bound server timeouts, rune-safe truncation, and TEST_DATABASE_URL-only integration tests.
codegirl007