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/date-fns/_lib/addLeadingZeros/index.js

@@ -0,0 +1,19 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = addLeadingZeros;
+
+function addLeadingZeros(number, targetLength) {
+  var sign = number < 0 ? '-' : '';
+  var output = Math.abs(number).toString();
+
+  while (output.length < targetLength) {
+    output = '0' + output;
+  }
+
+  return sign + output;
+}
+
+module.exports = exports.default;