- Service Worker: audio caching strategy for offline playback (cache-first) - Service Worker: CACHE_AUDIO message for explicit track caching - useMediaQuery hook with useIsMobile/useIsTablet/useIsDesktop helpers - PWAUpdateBanner and OfflineBanner components (previously stubs) - Missing notification icons: badge-72x72, checkmark, xmark Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- notificationService: subscribePush, getPreferences, updatePreferences - PushPreferencesSection: API-connected toggles, subscribe button - usePushSubscribe: permission, pushManager.subscribe, POST to API - NotificationMenu: document.title badge (N1.4) - sw.js: payload compat (link/url) - MSW: push/subscribe, preferences handlers
- Deleted apps/web/src/utils/optimisticStoreUpdates.ts (unused file) - File was unused - no imports found in codebase - Mutations already use React Query's onMutate pattern - No TypeScript errors after deletion - Actions 4.4.1.2 and 4.4.1.3 complete
