Distinct Heading Title
This page has a first-level heading but NO front-matter title, so the
destination page’s <title> comes from the H1 (“Distinct Heading Title”).
The browsable index uses the cheap Decision-D precedence
(data.title || slugToTitle(entry.id)), so its link label is the slug-derived
Title Case of h1-only -> “H1 Only”, which PROVABLY differs from this page’s
<title>. This fixture exists to genuinely exercise the documented
label/title divergence (unlike /no-h1, whose label and title coincide).