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/node_modules/axios/lib/helpers/isURLSameOrigin.js

@@ -0,0 +1,16 @@
+import platform from '../platform/index.js';
+
+export default platform.hasStandardBrowserEnv
+  ? ((origin, isMSIE) => (url) => {
+      url = new URL(url, platform.origin);
+
+      return (
+        origin.protocol === url.protocol &&
+        origin.host === url.host &&
+        (isMSIE || origin.port === url.port)
+      );
+    })(
+      new URL(platform.origin),
+      platform.navigator && /(msie|trident)/i.test(platform.navigator.userAgent)
+    )
+  : () => true;