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.
Switch avatar resize to ApproxBiLinear, cap hunt/profile/admin list queries, drop redundant admin/profile lookups, dedupe CI on app PRs, and refresh stale todo.md notes.