perf: SWR cache, skeleton loading, lazy-load maps [closes #336]#373
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…ls [closes #333] (#368) * perf: create api-cache utility with TTL-based get/set Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf: apply SWR cache to useTopPage — serve stale data instantly, revalidate in background Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf: apply SWR cache to useHeritageSearchQuery keyed by serialized search params Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> --------- Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
* perf: create api-cache utility with TTL-based get/set Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf: apply SWR cache to useTopPage — serve stale data instantly, revalidate in background Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf: apply SWR cache to useHeritageSearchQuery keyed by serialized search params Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(card): add isPriority prop — eager loading and fetchpriority for above-fold images Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(list): pass isPriority to first 3 cards in HeritageList Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(search): pass isPriority to first 3 cards in SearchResultsPage Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf: create HeritageCardSkeleton component matching thumbnail card dimensions Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(list): add isLoading prop to HeritageList — show skeleton grid while fetching Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(search): add isLoading prop to SearchResultsPage — show skeleton grid while fetching Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(container): remove Loading… early return from TopPageContainer — pass isLoading to HeritageList Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(container): pass isLoading to SearchResultsPage in SearchHeritageResultsContainer Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> --------- Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
…closes #331] (#372) * perf: create api-cache utility with TTL-based get/set Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf: apply SWR cache to useTopPage — serve stale data instantly, revalidate in background Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf: apply SWR cache to useHeritageSearchQuery keyed by serialized search params Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(card): add isPriority prop — eager loading and fetchpriority for above-fold images Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(list): pass isPriority to first 3 cards in HeritageList Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(search): pass isPriority to first 3 cards in SearchResultsPage Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf: create HeritageCardSkeleton component matching thumbnail card dimensions Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(list): add isLoading prop to HeritageList — show skeleton grid while fetching Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(search): add isLoading prop to SearchResultsPage — show skeleton grid while fetching Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(container): remove Loading… early return from TopPageContainer — pass isLoading to HeritageList Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(container): pass isLoading to SearchResultsPage in SearchHeritageResultsContainer Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(top): lazy-load Map component with React.lazy and Suspense pulse fallback Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * perf(detail): lazy-load DetailHeritageMap with React.lazy and Suspense pulse fallback Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * fix(card): remove isPriority/fetchPriority/eager loading — caused 403 on UNESCO image URLs fetchPriority="high" and loading="eager" triggered rate-limiting on UNESCO's document server. Revert to loading="lazy" for all images. Keep width, height, and decoding="async" for CLS prevention. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * fix(card): revert image dimension attrs added for #332 Drop decoding="async", width/height hints — image optimization issue is being closed without implementation. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> --------- Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
HeritageCardSkeletonwithanimate-pulseshown while cards are loading on both top page and search resultsMapandDetailHeritageMapconverted toReact.lazy()+Suspenseto reduce initial JS bundle sizeNote: image optimization (#332) was dropped after discovering
thumbnail_urlis a document URL that 403s under aggressive loading. Reverted to simpleloading="lazy".Test plan
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