[Phase 4.4] Cross-Platform Optimization & Accessibility Audit

[robinson]

Goal

Systematically test and fix accessibility violations, performance regressions,
and platform-specific issues across macOS and Windows.

Scope

• Accessibility audit: run axe-core / jest-axe across all screens; fix
  all WCAG 2.1 AA violations. Document any intentional AA exceptions.
• Keyboard navigation audit: tab order, focus rings, skip-links on every screen.
• Performance: measure and budget TTI < 2s on M1 Mac; bundle size < 2MB JS.
• Windows smoke test: launch app, navigate all screens, verify fonts render.
• Screen reader test: VoiceOver (macOS) through main learning flow.

Acceptance Criteria

• Zero Level A / AA axe-core violations on all Phase 1–4 screens.
• All interactive elements reachable and operable by keyboard alone.
• App launches in under 3s cold-start on reference hardware.
• Windows build passes smoke test (Tauri Windows target).
• VoiceOver can complete a full learning session.

References

• docs/UX_REDESIGN_STRATEGY.md — Part 6: Accessibility & Part 7: Performance Optimizations
• docs/DESKTOP_BETA_QA_GATE.md

Phase

Phase 4 — Advanced Features & Polish · Week 6–8