NavEnhancer
Render-null a11y island for SiteNav's <details>/<summary> accordion: syncs aria-expanded on toggle and closes the focused section on Escape. The accordion itself works with no JS — mount this alongside SiteNav (via the consumer's own Island with ssrFallback={null}) to layer the enhancement on top.
NavigationUsage
import { SiteNav } from "@zudo-sg/ui";
import NavEnhancer from "@zudo-sg/ui/src/chrome/nav-enhancer/nav-enhancer";
<SiteNav sections={sections} />
<Island when="visible" ssrFallback={null}><NavEnhancer /></Island>Click a section, then press Escape