Verified:
✅ docker-compose up -d → containers running
✅ curl http://localhost:8000 → 302 redirect to /login (OAuth)
✅ php artisan migrate:status → all 13 migrations ran
✅ php artisan test → 174/174 passing locally
✅ All Must Have requirements present
✅ All Must NOT Have constraints respected
✅ All UI text in German with 'Du' form
✅ Docker deployment working
✅ Auto-save functional
✅ .pro parser throws NotImplementedException
✅ Finalized download is placeholder
ALL TASKS COMPLETE: 28/28 (T0-T24 + F1-F4 + Success Criteria)
