feat: T04 fixes - i18n, auth tests, contact/vehicle test cleanup, status updates

.a0/worklog.md

@@ -93,3 +93,53 @@
 - Backend: 73/73 pytest passed, 91% coverage on contact modules (service 99%, ust_validation 94%, models 93%, schemas 94%, router 67%)
 - Frontend: 20/20 vitest passed
 - test_report.md updated
+
+---
+## T01 Re-Implementation (2026-07-14)
+
+### Backend
+- app/config.py: Pydantic BaseSettings with DATABASE_URL, REDIS_URL, JWT_SECRET, JWT_ALGORITHM, JWT_ACCESS_TTL_MINUTES=15, JWT_REFRESH_TTL_DAYS=7, CORS_ORIGINS, UPLOAD_DIR
+- app/database.py: Async SQLAlchemy engine, session factory, Base declarative, get_db dependency, init_db/drop_db helpers
+- app/models/user.py: User model with UUID PK, email(unique), password_hash, full_name, role(enum admin/verkaeufer/buchhaltung), language(default de), is_active(default true), created_at, updated_at
+- app/schemas/user.py: LoginRequest, TokenResponse, RefreshRequest, UserBase/Create/Update/Response/ListResponse, ErrorResponse, HealthResponse
+- app/utils/jwt.py: create_access_token, create_refresh_token, decode_token, verify_access_token, verify_refresh_token (HS256, type claim separation)
+- app/services/auth_service.py: hash_password (bcrypt), verify_password, get_user_by_email/id, authenticate_user, generate_token_pair, refresh_access_token, create_user, list_users (paginated), update_user, deactivate_user (soft delete)
+- app/dependencies.py: get_pagination, get_current_user (JWT bearer extraction), require_role (RBAC factory)
+- app/routers/auth.py: POST /login, POST /refresh, GET /me
+- app/routers/users.py: GET / (admin only, paginated), POST / (admin only), PUT /:id (admin only), DELETE /:id (admin only, soft delete)
+- app/main.py: FastAPI app with CORS, /api/v1 prefix, health endpoint, router registration
+- tests/conftest.py: Function-scoped async engine, session, admin/verkaeufer/inactive user fixtures, token fixtures, HTTP client fixtures
+- tests/test_health.py: 3 tests
+- tests/test_auth.py: 12 tests (login valid/invalid/inactive/nonexistent/email-format, refresh valid/invalid/access-rejected, me with/without/invalid/refresh token)
+- tests/test_users.py: 15 tests (list admin/non-admin/no-auth, pagination, create admin/non-admin/duplicate/short-pw, update admin/nonexistent, delete soft/nonexistent/non-admin, password hash exclusion)
+- tests/test_auth_service.py: 20 direct service unit tests
+- .env.example: All required env vars documented
+- requirements.txt: fastapi, uvicorn, sqlalchemy[asyncio], asyncpg, pydantic-settings, python-jose, passlib[bcrypt], redis, python-multipart, pytest, pytest-asyncio, httpx, pytest-cov
+
+### Frontend
+- package.json: Next.js 14, React 18, next-intl, Tailwind, Vitest, Testing Library
+- tsconfig.json, next.config.js, tailwind.config.ts, postcss.config.js, vitest.config.ts
+- app/globals.css: Design tokens as CSS vars (primary, secondary, background, surface, text, error, success, border)
+- app/layout.tsx: Root layout
+- app/page.tsx: Redirect to /login
+- app/(auth)/login/page.tsx: Login form with email/password, validation, Toast on error, i18n integration
+- lib/api.ts: Fetch wrapper with auth header injection, token refresh, login, getCurrentUser, listUsers, createUser, deleteUser, healthCheck
+- lib/auth.ts: useAuth hook (login, logout, fetchUser), useRequireAuth hook
+- lib/i18n.tsx: I18nProvider, useI18n hook, locale switching, parameter interpolation
+- components/ui/Button.tsx: Primary/secondary/danger/ghost variants, loading spinner
+- components/ui/Input.tsx: Label, error display, forwardRef
+- components/ui/Card.tsx: Title + children container
+- components/ui/Table.tsx: Generic table with columns + data
+- components/ui/Modal.tsx: Overlay modal with close button
+- components/ui/Toast.tsx: ToastProvider, useToast hook, success/error/info/warning types
+- messages/de.json: 28 keys (login, nav, common, user.role)
+- messages/en.json: 28 keys (matching de.json)
+- tests/setup.ts: localStorage mock, next/navigation mock
+- tests/auth.test.tsx: 10 tests (Button, Input, Card, Toast, i18n DE/EN/switch)
+- tests/i18n.test.tsx: 6 tests (key count ≥20, matching keys, translation, interpolation, fallback)
+
+### Test Results
+- Backend: 50/50 pytest passed, 93% total coverage (auth_service 95%, routers 98%)
+- Frontend: 16/16 vitest passed
+- TypeScript: tsc --noEmit exit 0
+- test_report.md created