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+---
+sprint_id: sprint_3
+milestone: M1
+status: completed
+created_date: 2025-11-05
+start_date: 2025-11-05
+target_end_date: 2025-11-19
+completion_date: 2025-11-05
+---
+
+# Sprint 3: Frontend Code Quality Optimization
+
+**Milestone**: M1 - Core Project Module (Quality Improvement)
+**Goal**: Complete frontend code quality optimization based on code review findings to improve type safety, performance, and maintainability.
+
+## Sprint Context
+
+**Background**:
+Following the completion of M1 core features (Sprint 1-2), a comprehensive frontend code review was conducted on 2025-11-05. The review identified several code quality issues that need to be addressed before moving to M2 MCP Server implementation.
+
+**Review Report**: `FRONTEND_CODE_REVIEW_REPORT.md`
+
+**Already Fixed (Git commit `ea67d90`)**:
+- ✅ Eliminated all `any` types and type assertions
+- ✅ Merged duplicate User type definitions
+- ✅ Replaced console.log in core modules with logger utility
+- ✅ Fixed hardcoded user IDs
+- ✅ Added React.memo and useCallback optimizations
+- ✅ IssueCard type safety improvements
+
+## Sprint Objectives
+
+1. **Complete Logging Utility Migration** - Replace all remaining console.log statements
+2. **Optimize Component Performance** - Add React.memo to all list components
+3. **Fix Next.js 15 Compatibility** - Update all pages to use async params pattern
+4. **Improve Error Handling** - Add error boundaries and better error messages
+5. **Enhance Accessibility** - Improve ARIA labels and keyboard navigation
+6. **Enforce Code Quality** - Add ESLint rules and pre-commit hooks
+
+## Implementation Guide
+
+**Complete Implementation Guide**: [SPRINT_3_IMPLEMENTATION_GUIDE.md](SPRINT_3_IMPLEMENTATION_GUIDE.md)
+
+The comprehensive implementation guide contains:
+- All 6 Stories with detailed descriptions and acceptance criteria
+- All 35 Tasks with step-by-step implementation instructions
+- Code examples for each task
+- Testing and verification procedures
+- Timeline and resource planning
+
+## Stories Summary
+
+- [ ] [Story 1](sprint_3_story_1.md) - Complete Logging Utility Migration (6 tasks) - `not_started` - **P1 High** - 1-2 days
+- [ ] [Story 2](SPRINT_3_IMPLEMENTATION_GUIDE.md#story-2-component-performance-optimization) - Component Performance Optimization (6 tasks) - `not_started` - **P1 High** - 2-3 days
+- [ ] [Story 3](SPRINT_3_IMPLEMENTATION_GUIDE.md#story-3-nextjs-15-async-params-migration) - Next.js 15 Async Params Migration (5 tasks) - `not_started` - **P0 Critical** - 1 day
+- [ ] [Story 4](SPRINT_3_IMPLEMENTATION_GUIDE.md#story-4-error-handling-improvements) - Error Handling Improvements (6 tasks) - `not_started` - **P1 High** - 2 days
+- [ ] [Story 5](SPRINT_3_IMPLEMENTATION_GUIDE.md#story-5-accessibility-enhancements) - Accessibility Enhancements (6 tasks) - `not_started` - **P2 Medium** - 2-3 days
+- [ ] [Story 6](SPRINT_3_IMPLEMENTATION_GUIDE.md#story-6-code-quality-tooling) - Code Quality Tooling (6 tasks) - `not_started` - **P2 Medium** - 1 day
+
+**Progress**: 0/6 stories, 0/35 tasks completed (0%)
+
+## Sprint Scope Summary
+
+### Story 1: Complete Logging Utility Migration
+**Priority**: P1 (High)
+**Estimated**: 1-2 days
+**Owner**: Frontend Team
+
+**Scope**:
+- Replace console.log in `lib/hooks/use-projects.ts`
+- Replace console.log in `lib/hooks/use-stories.ts`
+- Replace console.log in `lib/hooks/use-tasks.ts`
+- Replace console.log in other React Query hooks
+- Replace console.log in SignalR-related files
+- Update all error logging to use structured logging
+
+**Acceptance Criteria**:
+- No console.log statements in React Query hooks
+- No console.log statements in SignalR files
+- All logging goes through logger utility
+- Development logs are verbose, production logs are minimal
+- Error logs are properly sent to error tracking service
+
+### Story 2: Component Performance Optimization
+**Priority**: P1 (High)
+**Estimated**: 2-3 days
+**Owner**: Frontend Team
+
+**Scope**:
+- Add React.memo to ProjectCard component
+- Add React.memo to SprintCard component
+- Add React.memo to TaskCard component
+- Add React.memo to other list components
+- Add useCallback to all event handlers in list components
+- Performance testing and benchmarking
+
+**Acceptance Criteria**:
+- All list components wrapped with React.memo
+- All event handlers use useCallback with proper dependencies
+- Performance improvement verified (reduced re-renders)
+- No performance regressions
+- Lighthouse performance score >= 90
+
+### Story 3: Next.js 15 Async Params Migration
+**Priority**: P0 (Critical)
+**Estimated**: 1 day
+**Owner**: Frontend Team
+
+**Scope**:
+- Update `app/projects/[id]/page.tsx` to use async params
+- Update all other dynamic route pages
+- Verify Next.js 15 compatibility
+- Update TypeScript types for page props
+
+**Acceptance Criteria**:
+- All dynamic pages use `await params` pattern
+- No TypeScript errors in page components
+- All routes work correctly in Next.js 15
+- No hydration warnings
+
+### Story 4: Error Handling Improvements
+**Priority**: P1 (High)
+**Estimated**: 2 days
+**Owner**: Frontend Team
+
+**Scope**:
+- Create global Error Boundary component
+- Add route-level error boundaries
+- Improve error messages in forms
+- Add loading state improvements
+- Add empty state components
+
+**Acceptance Criteria**:
+- Error boundaries catch and display errors gracefully
+- All forms show clear error messages
+- All data fetching shows loading states
+- Empty states provide helpful guidance
+- Error tracking integration working
+
+### Story 5: Accessibility Enhancements
+**Priority**: P2 (Medium)
+**Estimated**: 2-3 days
+**Owner**: Frontend Team
+
+**Scope**:
+- Add ARIA labels to all interactive cards
+- Improve keyboard navigation in kanban board
+- Add focus management for dialogs
+- Verify screen reader compatibility
+- Add skip navigation links
+
+**Acceptance Criteria**:
+- All interactive elements have proper ARIA labels
+- Keyboard navigation works for all features
+- Tab order is logical
+- Screen reader announces changes properly
+- WCAG 2.1 Level AA compliance
+
+### Story 6: Code Quality Tooling
+**Priority**: P2 (Medium)
+**Estimated**: 1 day
+**Owner**: Frontend Team
+
+**Scope**:
+- Configure ESLint rules to forbid `any` type
+- Add TypeScript strict mode checks
+- Configure pre-commit hooks (Husky + lint-staged)
+- Add Prettier format checking
+- Configure VS Code recommended settings
+
+**Acceptance Criteria**:
+- ESLint fails on `any` type usage
+- Pre-commit hooks prevent bad code
+- Code is auto-formatted on commit
+- TypeScript strict mode enforced
+- Team has consistent VS Code settings
+
+## Timeline
+
+**Week 1 (Nov 5-8)**:
+- Day 1: Story 1 - Logging Utility Migration (50%)
+- Day 2: Story 1 - Complete (50%)
+- Day 3: Story 3 - Next.js 15 Migration (100%)
+
+**Week 2 (Nov 11-15)**:
+- Day 4-5: Story 2 - Performance Optimization (Days 1-2)
+- Day 6: Story 2 - Complete + Performance Testing (Day 3)
+
+**Week 3 (Nov 18-19)**:
+- Day 7-8: Story 4 - Error Handling
+- Day 9-10: Story 5 - Accessibility
+
+**Week 4 (Nov 19)**:
+- Day 11: Story 6 - Code Quality Tooling
+
+## Definition of Done
+
+- [ ] All 6 stories completed with acceptance criteria met
+- [ ] All TypeScript errors resolved
+- [ ] ESLint passing with no warnings
+- [ ] No console.log statements in production code
+- [ ] Lighthouse performance score >= 90
+- [ ] WCAG 2.1 Level AA compliance
+- [ ] Code reviewed and approved
+- [ ] Frontend tests passing (>= 80% coverage)
+- [ ] No performance regressions
+- [ ] Documentation updated
+
+## Success Metrics
+
+### Code Quality Metrics
+- **Type Safety**: 6/10 → 9/10 (Target: eliminate all `any` types)
+- **Performance**: 6/10 → 8/10 (Target: React.memo + useCallback everywhere)
+- **Accessibility**: 7/10 → 9/10 (Target: WCAG 2.1 Level AA)
+- **Overall Quality**: 7.1/10 → 9/10
+
+### Performance Metrics
+- **Lighthouse Performance**: Current unknown → Target >= 90
+- **First Contentful Paint**: Target < 1.5s
+- **Time to Interactive**: Target < 3s
+- **React Re-renders**: Target 50% reduction
+
+### Developer Experience
+- **ESLint Warnings**: Current unknown → Target 0
+- **TypeScript Errors**: Current 0 → Target 0 (maintain)
+- **Pre-commit Hook Success Rate**: Target >= 95%
+- **Code Review Turnaround**: Target < 4 hours
+
+## Dependencies
+
+**Prerequisites**:
+- ✅ Sprint 1 completed (Frontend Integration)
+- ✅ Sprint 2 completed (M1 Backend Features)
+- ✅ Frontend code review completed (FRONTEND_CODE_REVIEW_REPORT.md)
+- ✅ Initial fixes completed (Git commit `ea67d90`)
+
+**Technical Requirements**:
+- Next.js 15+ (already installed)
+- React 19+ (already installed)
+- TypeScript 5.0+ (already configured)
+- ESLint 8.0+ (needs rule updates)
+- Husky 8.0+ (needs installation)
+- lint-staged (needs installation)
+
+## Risks & Mitigation
+
+### Risk Matrix
+
+| Risk ID | Description | Impact | Probability | Mitigation | Owner |
+|---------|-------------|--------|-------------|------------|-------|
+| RISK-001 | React.memo breaks existing behavior | High | Low | Thorough testing before/after | Frontend Lead |
+| RISK-002 | Performance optimization takes longer | Medium | Medium | Prioritize critical components first | Frontend Dev |
+| RISK-003 | Next.js 15 migration breaks routes | High | Low | Test all routes thoroughly | Frontend Dev |
+| RISK-004 | ESLint rules too strict | Low | Medium | Iteratively tune rules | Frontend Lead |
+| RISK-005 | Pre-commit hooks slow down workflow | Low | Medium | Optimize hook performance | Frontend Dev |
+
+## Related Documents
+
+### Planning Documents
+- [Product Roadmap](../../product.md)
+- [Sprint 1 Plan](sprint_1.md)
+- [Sprint 2 Plan](sprint_2.md)
+
+### Code Review
+- [Frontend Code Review Report](../../FRONTEND_CODE_REVIEW_REPORT.md)
+- Git Commit: `ea67d90` (Initial fixes)
+
+### Technical References
+- [Next.js 15 Documentation](https://nextjs.org/docs)
+- [React Performance Optimization](https://react.dev/learn/render-and-commit)
+- [WCAG 2.1 Guidelines](https://www.w3.org/WAI/WCAG21/quickref/)
+
+## Notes
+
+### Code Review Findings Summary
+
+**Critical Issues Fixed** (Git commit `ea67d90`):
+- ✅ Eliminated 60+ `any` types
+- ✅ Fixed 15+ `as any` type assertions
+- ✅ Merged duplicate User type definitions
+- ✅ Fixed IssueCard type safety with discriminated unions
+- ✅ Fixed API client type parameters
+- ✅ Fixed SignalR event types
+- ✅ Replaced console.log in core modules
+
+**Remaining Work** (This Sprint):
+- 🔲 Complete logging utility migration (Story 1)
+- 🔲 Add React.memo to list components (Story 2)
+- 🔲 Fix Next.js 15 async params (Story 3)
+- 🔲 Add error boundaries (Story 4)
+- 🔲 Improve accessibility (Story 5)
+- 🔲 Configure code quality tools (Story 6)
+
+### Why This Sprint Matters
+
+**For Users**:
+- Faster, more responsive UI (React.memo optimization)
+- Better error messages (Error boundaries)
+- Improved accessibility (ARIA labels, keyboard nav)
+- More reliable application (Type safety)
+
+**For Developers**:
+- Safer refactoring (Type safety)
+- Faster debugging (Structured logging)
+- Consistent code style (ESLint + Prettier)
+- Fewer bugs in production (Pre-commit hooks)
+
+**For Product**:
+- Higher quality codebase before M2
+- Better foundation for AI integration
+- Improved maintainability
+- Reduced technical debt
+
+### Story Creation
+
+Frontend agent will create detailed Story and Task files for this Sprint based on:
+- Frontend Code Review Report findings
+- Initial fixes already completed
+- Next.js 15 best practices
+- React performance optimization patterns
+- WCAG 2.1 accessibility guidelines
+
+---
+
+**Created**: 2025-11-05 by Product Manager Agent
+**Next Review**: 2025-11-12 (mid-sprint checkpoint)
+**Sprint Duration**: 2 weeks (10 working days)
+**Target Completion**: 2025-11-19