This page and its pair carry only @view-transition { navigation: auto }. Click through; page B reports whether the browser actually ran the transition.
@view-transition site-wide on 2026-07-30: every internal page is prerendered on hover, so the document is already rendered at click time and the transition only added ~200ms over a navigation with nothing left to wait for. This diagnostic pair keeps its own opt-in because it tests the browser, not the site — that is the whole point of a mule.