Issue 269#517
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Kindly resolve conflict and fix workflow. |
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Closes #341
What was done
Implemented global CDN delivery for all static assets (images, fonts) with automatic SemVer-based URL versioning and aggressive 1-year cache headers enforced across three major deployment platforms.
Changes
New files:
src/utils/cdn.ts — Central CDN utility. Maps any asset path, remote URL, or require() module ID to a versioned CDN URL (https://cdn.teachlink.com/…?v=1.8.0). Handles URL sanitization, assets/ prefix stripping, and CDN URL version bumping.
vercel.json — Enforces Cache-Control: public, max-age=31536000, immutable for /assets/* on Vercel.
netlify.toml — Same 1-year cache header for Netlify deployments.
firebase.json — Same cache header for Firebase Hosting (dist/assets/**).
docs/cdn-strategy.md — Full CDN strategy documentation covering Cloudflare, AWS CloudFront, Vercel, Netlify, Firebase configs; curl verification commands; and performance monitoring KPIs (Cache Hit Ratio ≥ 95%, LCP, TTFB).
src/tests/utils/cdn.test.ts — 16 unit tests covering isCDNUrl, getCDNAssetUrl (null inputs, remote URLs, relative paths, assets/ prefix stripping, asset module ID resolution, error handling), and getCDNFontUrl.
Modified files:
src/components/ui/CachedImage.tsx — All image URIs are now rewritten through getCDNAssetUrl() before being passed to ImageCache.prefetchImages and expo-image. Local and remote paths are transparently mapped to the CDN origin.
src/services/fontService.ts — String font sources in loadFont() are routed through getCDNAssetUrl(), ensuring dynamically loaded fonts are fetched from CDN with cache busting on version bumps.
src/tests/components/imageCache.test.tsx — Added a CDN mock and updated prefetch assertions to expect CDN-versioned URLs. Added a dedicated "CDN URL rewriting" test scenario.