- core-apps
	- shipped with the system, required for a functional shop
	- same mechanics as any other app (manifest.yaml, router, migrations, events, DI) — no special status in the loader
	- typically declared `required: true` in manifest so they cannot be switched off
	- distinct from custom-apps (optional / third-party, not shipped)
	- cover: auth, product catalog, cart, checkout, payment, orders, mail, shipment (planned), plus the AI layer (ai_core, ai_shop, ai_admin)