feat(T02): vehicle management + mobile.de push + vehicle UI

- Vehicle model: 25+ fields, 5 vehicle types, soft-delete
- Vehicle CRUD: 7 API endpoints with JWT auth, filter/sort/paginate
- mobile.de: push/update/delete listings, field mapping, retry logic
- MobileDeListing model for sync status tracking
- Frontend: VehicleList, VehicleForm, VehicleDetail, MobileDeStatus
- 73 backend tests (82% coverage), 16 frontend tests

.a0/worklog.md

@@ -45,3 +45,26 @@
 - Backend: 50/50 passed, 88% total coverage
 - Frontend: 12/12 passed, Next.js build success
 - test_report.md erstellt
+
+## T02 – Vehicle Management + mobile.de Push + Vehicle UI (2026-07-14)
+
+### Backend
+- models/vehicle.py: Vehicle + MobileDeListing models with UUID PK, soft-delete, all fields per spec
+- schemas/vehicle.py: VehicleCreate/Update/Response/ListResponse, MobileDeStatusResponse, MobileDePushResponse with auto-compute power_hp
+- utils/mobilede_mapping.py: map_fields() converts Vehicle to mobile.de Ad format
+- services/vehicle_service.py: CRUD with pagination, filtering, sorting, soft-delete
+- services/mobilede_service.py: push/update/delete listing, get status, retry (max 3)
+- routers/vehicles.py: 7 endpoints (list, create, detail, update, delete, mobile-de push, mobile-de status)
+- config.py: Added MOBILE_DE_API_KEY, MOBILE_DE_SELLER_ID
+- main.py: Registered vehicles router
+
+### Frontend
+- lib/vehicles.ts: Full API client with typed interfaces
+- components/vehicles/: VehicleList, VehicleForm, VehicleDetail, MobileDeStatus
+- app/[locale]/fahrzeuge/: list page, neu (create) page, [id] detail page
+- tests/vehicles.test.tsx: 16 tests
+
+### Test Results
+- Backend: 73/73 pytest passed, 82% total coverage
+- Frontend: 16/16 vitest passed
+- test_report.md updated