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-admin-v2/nginx-admin.conf

@@ -0,0 +1,22 @@
+# LandveX Admin v2 — Nginx config
+# Lägg till i /etc/nginx/conf.d/ eller inkludera
+
+server {
+    listen 80;
+    server_name admin.landvex.com;
+
+    # API — proxy till admin-backend
+    location /api/ {
+        proxy_pass http://localhost:3456;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+    }
+
+    # Static files — serve UI
+    location / {
+        root /home/bernt/.openclaw/workspace/landvex-admin-v2/ui;
+        index index.html;
+        try_files $uri $uri/ /index.html;
+    }
+}