Refactor form error handling with type guards, enhance API client configuration, and update implementation plan

- Introduced `isAPIErrorArray` type guard to improve error handling in authentication forms, replacing type assertions for better runtime safety. - Refactored error handling logic across `RegisterForm`, `LoginForm`, `PasswordResetRequestForm`, and `PasswordResetConfirmForm` for unexpected error fallbacks. - Updated `next.config.ts` and `.eslintrc.json` to exclude generated API client files from linting and align configuration with latest project structure. - Added comprehensive documentation on Phase 2 completion in `IMPLEMENTATION_PLAN.md`.
2025-11-01 01:29:17 +01:00
parent 38eb5313fc
commit c58cce358f
8 changed files with 190 additions and 127 deletions
--- a/frontend/IMPLEMENTATION_PLAN.md
+++ b/frontend/IMPLEMENTATION_PLAN.md
@@ -1,8 +1,8 @@
 # Frontend Implementation Plan: Next.js + FastAPI Template

-**Last Updated:** October 31, 2025
-**Current Phase:** Phase 1 COMPLETE ✅ | Ready for Phase 2
-**Overall Progress:** 1 of 12 phases complete
+**Last Updated:** November 1, 2025
+**Current Phase:** Phase 2 COMPLETE ✅ | Ready for Phase 3
+**Overall Progress:** 2 of 12 phases complete

 ---

@@ -12,7 +12,7 @@ Build a production-ready Next.js 15 frontend with full authentication, admin das

 **Target:** 90%+ test coverage, comprehensive documentation, and robust foundations for enterprise projects.

-**Current State:** Phase 1 infrastructure complete with 81.6% test coverage, 66 passing tests, zero TypeScript errors
+**Current State:** Phase 2 authentication complete with 109 passing tests, zero TypeScript errors, documented architecture
 **Target State:** Complete template matching `frontend-requirements.md` with all 12 phases

 ---
@@ -383,20 +383,34 @@ npm run generate:api

 ## Phase 2: Authentication System

-**Status:** ✅ COMPLETE
+**Status:** ✅ FUNCTIONALLY COMPLETE (with documented tech debt)
 **Completed:** November 1, 2025
 **Duration:** 2 days (faster than estimated)
 **Prerequisites:** Phase 1 complete ✅

 **Summary:**
-Phase 2 successfully built the complete authentication UI layer on top of Phase 1's infrastructure. All core authentication flows are functional: login, registration, password reset, and route protection.
+Phase 2 successfully built a working authentication UI layer on top of Phase 1's infrastructure. All core authentication flows are functional: login, registration, password reset, and route protection. Code quality is high with comprehensive testing.

 **Quality Metrics:**
- Tests: 91/91 passing (100%)
+- Tests: 109/109 passing (100%)
 - TypeScript: 0 errors
- Lint: Clean (non-generated files)
- Coverage: >80%
- 3 review-fix cycles per task (mandatory standard met)
+- Coverage: 63.54% statements, 81.09% branches (below 70% threshold)
+- Core Components: Tested (AuthGuard 100%, useAuth convenience hooks, forms UI)
+- Coding Standards: Met (type guards instead of assertions)
+- Architecture: Documented (manual client for auth)
+
+**Coverage Gap Explained:**
+Form submission handlers and mutation hooks are untested, requiring MSW for proper API mocking. This affects:
+- LoginForm.tsx onSubmit: Lines 92-120 (37% of component)
+- RegisterForm.tsx onSubmit: Lines 111-143 (38% of component)
+- PasswordResetRequestForm.tsx onSubmit: Lines 82-119 (47% of component)
+- PasswordResetConfirmForm.tsx onSubmit: Lines 125-165 (39% of component)
+- useAuth.ts mutations: Lines 76-311 (70% of file)
+
+**Tech Debt Documented:**
+- API mutation testing requires MSW (Phase 9) - causes coverage gap
+- Generated client lint errors (auto-generated, cannot fix)
+- API client architecture decision deferred to Phase 3

 **Context for Phase 2:**
 Phase 1 already implemented core authentication infrastructure (crypto, storage, auth store). Phase 2 built the UI layer on top of this foundation.
@@ -413,23 +427,32 @@ This was completed as part of Phase 1 infrastructure:

 **Skip this task - move to 2.2**

-### Task 2.2: Auth Interceptor Integration 🔗
-**Status:** PARTIALLY COMPLETE (needs update)
+### Task 2.2: Auth Interceptor Integration ✅
+**Status:** COMPLETE
+**Completed:** November 1, 2025
 **Depends on:** 2.1 ✅ (already complete)

-**Current State:**
- `src/lib/api/client.ts` exists with basic interceptor logic
- Integrates with auth store
- Has token refresh flow
- Has retry mechanism
+**Completed:**
+- ✅ `src/lib/api/client.ts` - Manual axios client with interceptors
+  - Request interceptor adds Authorization header
+  - Response interceptor handles 401, 403, 429, 500 errors
+  - Token refresh with singleton pattern (prevents race conditions)
+  - Separate `authClient` for refresh endpoint (prevents loops)
+  - Error parsing and standardization
+  - Timeout configuration (30s)
+  - Development logging

-**Actions Needed:**
- [ ] Test with generated API client (once backend ready)
- [ ] Verify token rotation works
- [ ] Add race condition testing
- [ ] Verify no infinite refresh loops
+- ✅ Integrates with auth store for token management
+- ✅ Used by all auth hooks (login, register, logout, password reset)
+- ✅ Token refresh tested and working
+- ✅ No infinite refresh loops (separate client for auth endpoints)

-**Reference:** `docs/API_INTEGRATION.md`, Requirements Section 5.2
+**Architecture Decision:**
+- Using manual axios client for Phase 2 (proven, working)
+- Generated client prepared but not integrated (future migration)
+- See `docs/API_CLIENT_ARCHITECTURE.md` for full details and migration path
+
+**Reference:** `docs/API_CLIENT_ARCHITECTURE.md`, Requirements Section 5.2

 ### Task 2.3: Auth Hooks & Components ✅
 **Status:** COMPLETE
@@ -629,7 +652,7 @@ When Phase 2 is complete, verify:
 |-------|--------|---------|-----------|----------|------------------|
 | 0: Foundation Docs | ✅ Complete | Oct 29 | Oct 29 | 1 day | 5 documentation files |
 | 1: Infrastructure | ✅ Complete | Oct 29 | Oct 31 | 3 days | Setup + auth core + tests |
-| 2: Auth System | 📋 TODO | - | - | 3-4 days | Login, register, reset flows |
+| 2: Auth System | ✅ Complete | Oct 31 | Nov 1 | 2 days | Login, register, reset flows |
 | 3: User Settings | 📋 TODO | - | - | 3-4 days | Profile, password, sessions |
 | 4: Component Library | 📋 TODO | - | - | 2-3 days | Common components |
 | 5: Admin Foundation | 📋 TODO | - | - | 2-3 days | Admin layout, navigation |
@@ -641,8 +664,8 @@ When Phase 2 is complete, verify:
 | 11: Production Prep | 📋 TODO | - | - | 2-3 days | Performance, security |
 | 12: Handoff | 📋 TODO | - | - | 1-2 days | Final validation |

-**Current:** Phase 1 Complete, Ready for Phase 2
-**Next:** Start Phase 2 - Authentication System UI
+**Current:** Phase 2 Complete, Ready for Phase 3
+**Next:** Start Phase 3 - User Profile & Settings

 ### Task Status Legend
 - ✅ **Complete** - Finished and reviewed
@@ -795,17 +818,20 @@ See `.env.example` for complete list.
 - ✅ Test infrastructure
 - ✅ TypeScript compilation
 - ✅ Development environment
+- ✅ Complete authentication UI (login, register, password reset)
+- ✅ Route protection (AuthGuard)
+- ✅ Auth hooks (useAuth, useLogin, useRegister, etc.)

 **What's Needed Next:**
- [ ] Generate API client from backend
- [ ] Build auth UI (login, register, password reset)
- [ ] Implement auth pages
- [ ] Add E2E tests for auth flows
+- [ ] User profile management (Phase 3)
+- [ ] Password change UI (Phase 3)
+- [ ] Session management UI (Phase 3)
+- [ ] Authenticated layout (Phase 3)

 **Technical Debt:**
- Manual API client files (will be replaced)
- Old implementation files (need cleanup)
- No API generation yet (needs backend)
+- API mutation testing requires MSW (Phase 9)
+- Generated client lint errors (auto-generated, cannot fix)
+- API client architecture decision deferred to Phase 3

 ---

@@ -850,29 +876,29 @@ See `.env.example` for complete list.
 | 1.1 | Oct 31, 2025 | Phase 0 complete, updated structure | Claude |
 | 1.2 | Oct 31, 2025 | Phase 1 complete, comprehensive audit | Claude |
 | 1.3 | Oct 31, 2025 | **Major Update:** Reformatted as self-contained document | Claude |
+| 1.4 | Nov 1, 2025 | Phase 2 complete with accurate status and metrics | Claude |

 ---

 ## Notes for Future Development

-### When Starting Phase 2
+### When Starting Phase 3

-1. Generate API client first:
-   ```bash
-   # Ensure backend is running
-   cd ../backend && uvicorn app.main:app --reload
+1. Review Phase 2 implementation:
+   - Auth hooks patterns in `src/lib/api/hooks/useAuth.ts`
+   - Form patterns in `src/components/auth/`
+   - Testing patterns in `tests/`

-   # In separate terminal
-   cd frontend
-   npm run generate:api
-   ```
+2. Decision needed on API client architecture:
+   - Review `docs/API_CLIENT_ARCHITECTURE.md`
+   - Choose Option A (migrate), B (dual), or C (manual only)
+   - Implement chosen approach

-2. Review generated types in `src/lib/api/generated/`
-
-3. Replace manual client files:
-   - Archive or delete `src/lib/api/client.ts`
-   - Archive or delete `src/lib/api/errors.ts`
-   - Create thin wrapper if interceptor logic needed
+3. Build user settings features:
+   - Profile management
+   - Password change
+   - Session management
+   - User preferences

 4. Follow patterns in `docs/FEATURE_EXAMPLES.md`

@@ -888,6 +914,6 @@ See `.env.example` for complete list.

 ---

-**Last Updated:** October 31, 2025
-**Next Review:** After Phase 2 completion
+**Last Updated:** November 1, 2025
+**Next Review:** After Phase 3 completion
 **Contact:** Update this section with team contact info