Productionize WP Suite: auth, security hardening, sync, dashboard, PWA, email

Brings the Work Package Suite from a browser-local prototype to a
multi-tenant, SQL-backed deployment hardened for customer IP.

Auth & access control
- Local username/password login (bcrypt + JWT in an HttpOnly cookie),
  admin-managed users, per-project membership, and project-scoped API access.
- Admin console: change user roles, view the audit trail, manage settings.

Security hardening
- CSP / HSTS / X-Frame-Options / nosniff headers in nginx; Secure cookie via
  X-Forwarded-Proto; CSRF Origin check; attribute-safe output escaping.
- Login lockout, token_version session revocation, stronger password policy,
  fail-closed secret loading, encrypted (AES-256) database backups.

Persistence & schema
- SOPs and Work Packages are now DB-backed and shared across users, written
  through a durable client sync outbox that queues offline edits.
- Alembic migrations applied automatically on container start.

New capabilities
- Phase 2 dashboard (progress, gating, pagination, archive).
- Phase 3 PWA "Field View" with offline caching and auth fallback.
- WP owner assignment with OPTIONAL email notifications, OFF by default and
  toggled from the admin console. SMTP password is read only from the
  SMTP_PASSWORD env var (never stored); emails carry a WP number + deep link,
  never customer IP.

Also: IBM Carbon restyle, Help section, and DEPLOYMENT.md brought up to date.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

server/.env.example

@@ -20,3 +20,13 @@ AUTH_SECRET_KEY=CHANGE_ME_run_the_command_above
 
 # How long a login lasts before re-authentication (hours). Default 12.
 # AUTH_SESSION_HOURS=12
+
+# ── Email notifications (optional) ─────────────────────────────────────────────
+# WP-assignment emails are OFF by default and are turned on from the Admin
+# console (Notifications & email card), where the SMTP host/port/from-address
+# live. The one secret that must NOT be stored in the database — the SMTP
+# password — is read from this environment variable instead. Leave it unset
+# until you have the SMTP details; the toggle stays effectively off (queued
+# notifications are marked "skipped", nothing is sent) until both the toggle is
+# on and SMTP is configured.
+# SMTP_PASSWORD=your-smtp-app-password