feat: Core Web Vitals monitoring with regression alerts#492
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RUKAYAT-CODER merged 7 commits intoMay 30, 2026
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- Add webVitals service using web-vitals library (LCP, FID, CLS, FCP, TTFB) - Rate each metric as good/needs-improvement/poor against Google thresholds - Report metrics to mobileAnalyticsService on each measurement - Detect regressions (>20% above baseline) and fire WEB_VITALS_REGRESSION event - Add PerformanceMetric and AnalyticsEvent entries for all 5 vitals + regression - Call webVitalsService.init() in App.tsx at startup - Add 15 unit tests covering thresholds, ratings, event mapping, and regression detection
- Fix missing comma in package.json scripts section (merge artifact) - Regenerate package-lock.json from merged package.json
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- Add warmCriticalCaches() that parallel-fetches courses + user profile - Replace fake 500ms delay in prepareApp with real cache warming - Failures are swallowed so warming never blocks startup - 6 unit tests covering all branches
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Kindly resolve conflict and fix workflow. |
Resolved conflicts in: - App.tsx: merged imports (warmCriticalCaches, webVitalsService, prefetchExternalResources), removed duplicate requireEnvVariables/appLogger imports, kept both data fetch step and cache warming in startup sequence - package-lock.json: regenerated from merged package.json
…ring Kept clean import resolution: warmCriticalCaches, webVitalsService, prefetchExternalResources without duplicates. Startup sequence runs data fetch then cache warming.
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fixed workflow no conflicts |
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closes #247