- <SeoBreadcrumbs> (UI-SPEC L1): the resolve answer's trail as nav > ol
with server-rendered links and the last item as aria-current text;
nothing with fewer than two items, with page meta seo.breadcrumbs false
or with the option seo.breadcrumbs false; props items, label,
hideCurrent, locale
- one trail per page: the first rendered instance claims it
(seoClaimBreadcrumbs, kept per path)
- seoSitePath: same-origin CMS URLs become paths, non-http(s) URLs are
never links; useSeoLabels takes an optional locale
- L1 default styles with CSS-generated separators
