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12-1-mobile-performance-optimizationBacklogEpic 12.1

Story 12.1: Mobile Performance Optimization

**Epic:** Epic 12 - Mobile-First Performance & Browser Support **Story ID:** 12.1 **Created:** 2025-12-08 **Status:** ready-for-dev **Priority:** P0 (Critical - Mobile performance competitive differentiator) **Effort:** 6-8 hours

Acceptance Criteria

  • [x] **AC-12.1-1:** WebP/AVIF images served on modern browsers (ALREADY IMPLEMENTED)
  • [ ] **AC-12.1-2:** Route-based code splitting for all pages (lazy load page components)
  • [ ] **AC-12.1-3:** Component lazy loading for heavy components (> 50KB)
  • [ ] **AC-12.1-4:** Critical CSS inlined using critters, non-critical CSS deferred
  • [ ] **AC-12.1-5:** Unused code tree-shaken in production builds (verified via bundle analysis)
  • [ ] **AC-12.1-6:** Initial mobile bundle < 200KB (gzipped)
  • [ ] **AC-12.1-7:** Suspense boundaries with skeleton screens for lazy-loaded components
  • [ ] **AC-12.1-8:** Bundle analysis report generated in CI/CD
  • [ ] **AC-12.1-9:** First Contentful Paint (FCP) < 1.5s on 3G
  • [ ] **AC-12.1-10:** Largest Contentful Paint (LCP) < 2.5s on 3G
  • [ ] AC-12.1-11: Dynamic imports for modals and heavy UI components
  • [ ] AC-12.1-12: Preload hints for critical resources

Progress

Tasks0/0
Acceptance Criteria12
Total Tasks0

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