fix(docs): stop mobile /docs from jumping to top on scroll#9
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The IntersectionObserver-driven pill auto-centering effect called scrollIntoView on a pill anchor inside a position:sticky header. On mobile browsers, scrollIntoView walks the scroll-ancestor chain and (with sticky positioning) can scroll the document scroller even with block:'nearest', producing a smooth-scroll animation that fights the user's own scroll and yanks the page toward the top on every section change. Scroll the pill <ul> container directly instead, so only the horizontal pill bar moves and the document scroll is never touched.
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Summary
/docsbug where the page constantly snapped toward the top on scroll, tap, or section navigation.DocsLayoutran anIntersectionObserver-driven effect that calledscrollIntoView({ behavior: 'smooth', inline: 'center', block: 'nearest' })on a pill anchor inside theposition: stickyheader. On mobile browsers,scrollIntoViewwalks the scroll-ancestor chain and — with sticky positioning — can scroll the document even withblock: 'nearest', kicking off a smooth animation that fights the user's own scroll on every section change.<ul>container directly viacontainer.scrollTo({ left, behavior: 'smooth' }), so only the horizontal pill bar moves and the document scroller is never touched.Test plan
/docsand scroll through sections — verify the page no longer jumps toward the top as the active pill changes./docs(≥ lg breakpoint, sidebar visible) — verify nothing regresses; the sidebar highlight should still follow the active section.npm run build(typecheck + Vite build) passes locally.