- <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
- useSeoLabels(): the L8 dictionary (en, pl) of the page's content locale
(resolve locale, then html_lang, then en), overridable and extendable in
app.config.ts under seo.labels; no i18n dependency
- seo-tokens.css (spacing, colour, small type, breadcrumb separator) and
seo-base.css (.seo-visually-hidden, the focus ring of layer links), loaded
before the app's CSS and styling only .seo-* classes
