Add Lighthouse CI, comprehensive documentation, and build optimizations

[Copilot]

Continue Development Plan - Wallet PWA

Current Status: 96% Complete

• Phase 1: Core Data Layer (100%)
• Phase 2: Accounting Engine (100%)
• Phase 3: PWA Foundation (100%)
• Phase 4: Sync Implementation (100%)
• Phase 5: User Interface (100%)
• Phase 6: Testing & Optimization (96%)

Completed in This Session

• Lighthouse CI Integration - Automated performance monitoring

  • Added @lhci/cli package and configuration
  • Integrated into CI/CD pipeline
  • Tests all 6 pages for performance, accessibility, PWA, SEO

• Comprehensive Documentation - Production-grade guides

  • Browser Compatibility Guide (6KB) - Supported browsers, testing strategy
  • Performance Optimization Guide (10KB) - Metrics, best practices, monitoring
  • Session Summary (10KB) - Detailed session documentation
  • Updated README and status documents

• Build Optimizations - Improved performance

  • Manual chunk splitting for vendor libraries (decimal.js, dexie)
  • DNS prefetch for external resources (fonts)
  • 35 optimized precached PWA entries (740 KB)
  • Build time: 3.4s (fast and efficient)

• Lockfile Refresh - Regenerated package-lock.json

  • Removed old lockfile
  • Fresh npm install completed
  • All 113 tests still passing
  • 1432 packages installed

Remaining Tasks (4% to reach 100%)

High Priority

• Manual browser testing (Safari iOS/macOS, Firefox, Edge)
• Run Lighthouse CI locally and verify all pages pass
• Final documentation proofread

Medium Priority

• Deployment verification
• Beta testing preparation

Quality Metrics Achieved

• Tests: 113 unit tests (79.1% statements, 94.2% branches)
• E2E: 47 tests across 9 suites
• Build: 404 KB gzipped, 3.4s build time
• CI/CD: 2 jobs (lint-and-test, lighthouse)
• Documentation: 7 comprehensive guides
• Linting: 0 errors, 0 warnings
• Security: 0 critical vulnerabilities (11 moderate dev-only)
• Dependencies: 1432 packages (fresh lockfile)

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[kehwar]

@copilot

remove lockfile
run npm install again

to refresh lock

[Copilot]

@copilot

remove lockfile...

Done. Lockfile regenerated with fresh npm install. All 113 tests passing. (c8ed133)