Public-facing stores and booking pages for businesses powered by Mechia.
Canonical public routes
`/store/[slug]` or `/order/[slug]` for product storefronts
`/book/[slug]` for service bookings
`/hotel/[slug]` for hotel and stay booking
`/pay/[token]` for secure payment links
Launch rule
Public checkout and booking writes must go through validated Edge Functions, not direct table inserts.