Fetch a single menu by its ID, scoped to the authenticated company. Returns the same shape as an entry in the list endpoint, including product_count (the number of active products on the menu) and url (its primary public link, null when the menu has no primary URL). Returns 404 when no menu with that ID exists in the company, and 403 when your team restrictions hide it.

Required permission: products_permissions_view (admins are always allowed).