- Verified ESLint rules are correct after Epic 9 component changes
- Typography, spacing, color, and button component rules all in place
- Rules working correctly (tested with npm run lint)
- Created comprehensive apps/web/README.md with:
- Quick start and setup steps
- Type generation instructions (npm run generate:types)
- Validation scripts documentation (validate:schemas, validate:types, validate:all)
- All npm scripts documented
- Project structure, design system, ESLint rules
- Troubleshooting guide
- All setup tasks complete, README now documents all new scripts and workflows
- Verified tsconfig.json path aliases are correct (@/* covers all file moves)
- Verified vite.config.ts path aliases are correct (all aliases configured)
- Path aliases use @/ which automatically handles file moves
- No path-related TypeScript errors found
- All imports work correctly through path aliases
- No changes needed - aliases already correct
- Fixed broken import path in apps/web/src/types/backend-types.ts
- Removed incorrect import of PostType from non-existent relative path
- PostType is not exported from socialService and not used in backend-types.ts
- Verified no other broken imports found
- All imports valid after cleanup tasks and file moves/deletions
- Enhanced optimistic update utilities with concurrent update handling documentation
- cancelQueries in onMutate prevents refetches from overwriting optimistic updates
- setQueryData is atomic, so optimistic updates are safe even with concurrent mutations
- Added comments explaining how React Query handles concurrent mutations
- React Query automatically queues mutations, cancelQueries provides additional safety
- For critical resources, developers can use mutateAsync and await for sequential execution
- Prevents race conditions in concurrent state updates
- Set default staleTime: 1 minute (data considered fresh for 1 minute)
- Set default gcTime: 5 minutes (data kept in cache for 5 minutes)
- Enabled refetchOnMount: true (refetch stale data when component mounts)
- Enabled refetchOnReconnect: true (refetch stale data when network reconnects)
- Kept refetchOnWindowFocus: false (intentional - avoid unnecessary refetches)
- Individual hooks can override these defaults with their own staleTime values
- Ensures stale data is automatically refreshed appropriately
- Implemented analyticsService.recordEvent() method
- Uses backend /analytics/events endpoint for event tracking
- Fails silently to avoid disrupting user experience
- Logs events in development mode for debugging
- Error tracking already handled by Sentry (Monitor 5)
- Components can track feature usage via analyticsService.recordEvent()
- Complete user analytics system for tracking feature usage and interactions
- Created MonitoringDashboard component to visualize system metrics
- Added monitoring tab to AdminDashboardPage (/admin route)
- Displays validation metrics (total, successful, failed, failure rate)
- Shows top 5 endpoints with most validation failures
- Displays Sentry error tracking status and configuration
- Shows performance monitoring information
- Auto-refreshes metrics every 30 seconds
- Manual refresh button available
- Links to Sentry dashboard when configured
- Complete monitoring solution for system health visibility
- Verified validation failure tracking is fully implemented
- ValidationMetricsTracker tracks failures and success rates
- Validation errors logged via logger.error (sends to Sentry)
- ValidationAlerting monitors metrics and sends alerts to Sentry
- Tracks failure rate, failures by endpoint, timestamps
- Alerting automatically started in production
- Complete validation failure tracking solution already in place
- Edge 5.1: Verified BroadcastChannel fallback already implemented (returns null, logs warning)
- Edge 5.2: Created safe storage utility for localStorage/sessionStorage
- safeLocalStorage and safeSessionStorage automatically fall back to in-memory storage
- Handles private browsing mode and quota exceeded errors gracefully
- Tests availability before use
- Logs warnings when fallback is used
- Provides utility functions to check support
- Improves reliability in all browser environments
- Created .env.example with all required environment variables
- Documented API, WebSocket, Stream, Upload configurations
- Documented application configuration (name, version)
- Documented debug mode and MSW settings
- Documented optional variables (FCM, Sentry)
- All variables include descriptions and default values
- Helps developers set up the project correctly
- Replaced KodoEmptyState in DashboardPage with EmptyState
- Replaced all custom empty states in SearchPage with EmptyState:
- No results found state
- No tracks found state
- No playlists found state
- No users found state
- Start searching state
- All empty states now use the standard EmptyState component
- Consistent UI and behavior across all empty states
- Created useTabVisibility hook to track tab visibility state
- Provides whenVisible(), whenHidden(), onVisible() utilities
- Executes callbacks when visibility changes
- Created useLongRunningOperation hook for managing long-running operations
- Operations can continue when tab is hidden (configurable)
- Provides start(), stop(), isRunning() control functions
- Supports abort controller for cancellation
- Cleanup on unmount
- All hooks are properly typed and documented with examples
- Created useDebouncedCallback hook for debouncing callbacks
- Created useThrottledCallback hook for throttling callbacks
- Created usePreventDoubleClick hook for preventing double-clicks
- All hooks are properly typed and documented with examples
- Components can use these hooks to prevent rapid interactions
- Existing ButtonLoading component already disables buttons during loading
- Added slow request detection with 1 second threshold
- Tracks request timing in request interceptor
- Detects and marks slow requests (> SLOW_REQUEST_THRESHOLD)
- Logs slow requests in dev mode with duration
- Provides utility functions:
- isSlowRequest() - check if request is slow
- getRequestDuration() - get request duration in ms
- Components can use these utilities to show additional loading feedback
- React Query already provides isLoading/isFetching for loading states
- Replaced custom empty state div with EmptyState component
- Added EmptyState import from @/components/ui/empty-state
- Improved empty state UI with icon, title, description, and action button
- Different messages for empty list vs empty search results
- Added upload action button when no tracks (not in search mode)
- Fixed pre-existing errors: added useInfiniteQuery import, fixed tracksData reference
- Edge 1.4: Marked as complete (EmptyState component already exists)
- Edge 1.1 & 1.3: In progress - improved empty state handling
- Cleanup 5: Remove duplicate chat store - COMPLETE
- Verified stores/chat.ts does not exist (already removed in Action 4.5.1.5)
- Active store is at features/chat/store/chatStore.ts
- All production code uses the feature store location
- Test mocks reference @/stores/chat but this is just a mock path, not actual code
- Removed obsolete TODO in useChat.ts: fetchHistory function already implemented
- Updated EXHAUSTIVE_TODO_LIST.md: Cleanup 14 marked as COMPLETE
- Summary: Fixed 1 TODO, improved 1 TODO, removed 1 obsolete TODO
- Preserved backend-dependent and architectural TODOs per audit recommendations
- Cleanup 7: Remove unused type files - COMPLETE
- Verified no obsolete type files found
- All type files are in active use:
- dto.ts: 10 types still used via barrel exports
- v2-v3-types.ts: 20+ UI-specific types still in use
- backend-types.ts: 2 types used in socialService.ts
- Action 1.1.3.11 audit confirmed no empty or redundant files
- Ready for next cleanup tasks
- Cleanup 6: Remove obsolete state utility files - COMPLETE
- All 6 obsolete files already deleted in Action 4.6.1.3:
- stateCleanup.ts and test
- stateVersioning.ts, test, and example
- statePersistence.ts
- Verified no imports found for any of these utilities
- Ready for next cleanup tasks
- Cleanup 4: Remove stores/auth.ts if obsolete - COMPLETE
- File does not exist (already removed in Action 4.5.1.4)
- Verified no imports reference stores/auth.ts
- All code uses features/auth/store/authStore.ts
- Ready for next cleanup tasks
- Cleanup 16: Remove unused variables - COMPLETE
- Verified no unused variables in production code (src/)
- Unused variables only exist in test files (intentional)
- Ready for next cleanup tasks
- Cleanup 13: Audit TODO comments - COMPLETE
- Found 26 TODO/FIXME/XXX/HACK comments
- Categorized and prioritized for Cleanup 14
- Ready for next cleanup tasks
- Cleanup 10: Audit console.log statements - COMPLETE
- Cleanup 11: Replace console.log with logger - COMPLETE (no production console.log found)
- Cleanup 12: Replace console.error/warn with logger - COMPLETE (5 instances replaced)
- All production console statements now use logger
- Ready for next cleanup tasks
