Offline A/B harness. The live funnel is untouched. Variant served:
This long block shows only on the control variant. It proves the edge assigns and renders the variant before the page paints, so there is no flicker.
Reservar (demo CTA)data-variant on <html>. The client lib fires
page_view on load and tracks clicks marked data-slate-event. Events POST to
/api/track, which writes to Baserow ab_test_events (T.1059).
Next step: replace this page with the real ES funnel replica (/bienvenido, /reservar, /ver).