Implement Stage 6 Track A: PIN → Username/Password auth migration
- New User model (username, argon2id password_hash, totp fields, lockout)
- New UserSession model (DB-backed revocation, replaces in-memory set)
- New services/auth.py: Argon2id hashing, bcrypt→Argon2id upgrade path, URLSafeTimedSerializer session/MFA tokens
- New schemas/auth.py: SetupRequest, LoginRequest, ChangePasswordRequest with OWASP password strength validation
- Full rewrite of routers/auth.py: setup/login/logout/status/change-password with account lockout (10 failures → 30-min, HTTP 423), IP rate limiting retained as outer layer, get_current_user + get_current_settings dependencies replacing get_current_session
- Settings model: drop pin_hash, add user_id FK (nullable for migration)
- Schemas/settings.py: remove SettingsCreate, ChangePinRequest, _validate_pin_length
- Settings router: rewrite to use get_current_user + get_current_settings, preserve ntfy test endpoint
- All 11 consumer routers updated: auth-gate-only routers use get_current_user, routers reading Settings fields use get_current_settings
- config.py: add SESSION_MAX_AGE_DAYS, MFA_TOKEN_MAX_AGE_SECONDS, TOTP_ISSUER
- main.py: import User and UserSession models for Alembic discovery
- requirements.txt: add argon2-cffi>=23.1.0
- Migration 023: create users + user_sessions tables, migrate pin_hash → User row (admin), backfill settings.user_id, drop pin_hash
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Kyle Pope
fbc452a004