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Performance: make ArSonKuPik landing static-first and Core Web Vitals friendly - #42
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| if ('requestIdleCallback' in window) { | ||
| window.requestIdleCallback(loadCore, { timeout: 1400 }); | ||
| } else { | ||
| window.requestAnimationFrame(() => window.setTimeout(loadCore, 0)); |
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When the local manifest pauses distribution, users can still click the initially active /releases/latest download links before this idle callback loads site-v6-core.js; the synchronous lockDirectDownloadCtas() that previously enforced the pause is now delayed for up to 1.4 seconds and potentially longer under throttling. Keep the lightweight CTA lock in the immediate loader and defer only release enrichment so a paused or stale release cannot remain temporarily advertised.
AGENTS.md reference: AGENTS.md:L57-L59
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| const initializeEnhancements = () => { | ||
| setupPresetExplorer(); | ||
| setupProductPreview(); | ||
| setupNavigationState(); | ||
| root.setAttribute('data-experience-layer', 'v7-static-first'); |
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This replacement removes setupCrossPlatformCopy, setupScrollReveals, setupPointerDepth, and setupSignalAccent, but the repository validators still require those exact tokens. Running python3 tools/validate-premium-landing.py on this commit fails with Audio experience is missing setupCrossPlatformCopy, and the documented validate-public-release.ps1 invokes that validator, so the standard validation suite cannot pass until its assertions are updated to describe the new contract.
AGENTS.md reference: AGENTS.md:L137-L150
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Goal
Harden the ArSonKuPik public landing after the Google site-name fix, using current Google Search, web.dev and Cloudflare Pages guidance: keep the preferred brand identity static and crawlable, reduce startup main-thread work, prioritize the likely LCP image, defer offscreen rendering, and keep sitemap freshness truthful.
Changes
offsetTopprobing.content-visibility: auto+contain-intrinsic-sizeto long below-the-fold sections so modern browsers can skip initial layout/paint work.Linkpreload headers for the hero WebP on EN/ID homepages, enabling Pages Early Hints before the HTML response completes.<lastmod>to 2026-09-12 because the homepage structured data/performance behavior changed significantly.Performance impact from source size/work
experience-v4.js: 17,283 B -> 8,311 B (~52% smaller raw).site-v6-core.js(21,994 B) is no longer requested/parsed on the immediate critical path; it is scheduled for browser idle.fetchpriority=high, HTML-preloaded, now additionally eligible for Cloudflare Early Hints.SEO / trust invariants preserved
ArSonKuPikwith the lowercasearsonkupik.pages.devfallback introduced in SEO: harden ArSonKuPik site-name signals for Google #41.Rationale
Google says
WebSitestructured data is the strongest site-name preference signal and that homepage signals should be consistent. Google also says sitemaplastmodshould represent significant changes such as structured-data updates. web.dev recommends making LCP resources discoverable/prioritized, reducing main-thread work, and usingcontent-visibilitywhere appropriate. Cloudflare Pages automatically supports Early Hints and can derive them fromLinkpreload headers.Validation expected
Existing Pages CI should run P0 release-boundary, SEO, global-discovery P1/P2, rendered canonical artifact, and live SEO validation. No release binary or release manifest changes are included.