Root cause of "can't log in with new credentials": routes/user.js POST called
User.add, which doesn't exist on the redis User model (it has create) — so every
API-created account threw and was never persisted. Switch to User.create and make
the Add button a submit.
Replace the broken password rule (rejected strong "@123Caplowercase", accepted
weak "lowercase1") with a clear policy in utils/password_policy.js: >= 8 chars and
either 12+ chars or 3-of-4 character classes. Enforced server-side on create and
password changes, mirrored in public/lib/js/val.js, with unit tests.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
