Stores can enable/disable feature modules from Settings. When disabled,
nav links are hidden and API routes return 403. Designed as the
foundation for future license-based gating (licensed + enabled flags).
Core modules (Accounts, Members, Users, Roles, Settings) are always on.
- module_config table with slug, name, description, licensed, enabled
- In-memory cache for fast per-request module checks
- requireModule middleware wraps route groups in main.ts
- Settings page Modules card with toggle switches
- Sidebar hides nav links for disabled modules
- Default modules seeded: inventory, pos, repairs, rentals, lessons,
files, vault, email, reports
