feat: Passwordless cross-device authentication

- Arkitektur: docs/auth/passwordless-architecture.md
- Backend: iom/quixzoom-auth-service/ (FastAPI + Redis)
- Webb: quixzoom-market-pages/se/login/ (QR-kod + polling)
- App: iom/quixzoom-app/src/features/auth/ (push + deep links)

Flöde: QR-kod → app-godkännande → webb-inloggad

landvex-report-system/.env.example

@@ -0,0 +1,28 @@
+# Database
+DB_HOST=localhost
+DB_PORT=5432
+DB_NAME=landvex_reports
+DB_USER=postgres
+DB_PASSWORD=your_password
+
+# Redis
+REDIS_URL=redis://localhost:6379
+
+# OpenAI
+OPENAI_API_KEY=sk-your-openai-key
+
+# Email (SMTP)
+SMTP_HOST=smtp.gmail.com
+SMTP_PORT=587
+SMTP_USER=your-email@gmail.com
+SMTP_PASS=your-app-password
+
+# Server
+PORT=3000
+NODE_ENV=development
+JWT_SECRET=your-jwt-secret-key-change-in-production
+
+# AWS (for production)
+AWS_REGION=eu-north-1
+AWS_ACCESS_KEY_ID=
+AWS_SECRET_ACCESS_KEY=