The system DB connection opened in google_callback is now closed in a
finally block, so it is released even when an exception occurs between
open and close.
PasswordHasher and VerifyMismatchError are now imported at module level in
router.py and providers/password.py. Wrong-password errors are caught as
VerifyMismatchError (401); unexpected errors fall through to a 500 with logging.
- Google OAuth with authlib + auto user creation + cookie-based JWT
- Password auth with argon2 hash + setup token flow
- Email magic link with SMTP/SendGrid support
- Cookie-based auth for web UI (after OAuth redirect)
- Dashboard template compatibility (user_info, activity, desktop status)
- 150 tests passing
