{{-- Google Analytics 4 tag for the public DEMO install ONLY. Included from every layout (landing, admin, cashier, auth, installer) so the demo can track visitor movement across the whole product — not just the marketing page. It self-gates on demo mode + a configured Measurement ID, so it is impossible for it to load on a real customer install (which must never phone home — see CLAUDE.md §2). A real install has POS_DEMO_MODE off, so `pos_is_demo()` is false and this renders nothing. The inline gtag snippet is the vendor-supplied boilerplate; it is the one sanctioned place we hand-write a @endif