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/sprintf-js/demo/angular.html

@@ -0,0 +1,20 @@
+<!doctype html>
+<html ng-app="app">
+<head>
+    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0-rc.3/angular.min.js"></script>
+    <script src="../src/sprintf.js"></script>
+    <script src="../src/angular-sprintf.js"></script>
+</head>
+<body>
+    <pre>{{ "%+010d"|sprintf:-123 }}</pre>
+    <pre>{{ "%+010d"|vsprintf:[-123] }}</pre>
+    <pre>{{ "%+010d"|fmt:-123 }}</pre>
+    <pre>{{ "%+010d"|vfmt:[-123] }}</pre>
+    <pre>{{ "I've got %2$d apples and %1$d oranges."|fmt:4:2 }}</pre>
+    <pre>{{ "I've got %(apples)d apples and %(oranges)d oranges."|fmt:{apples: 2, oranges: 4} }}</pre>
+
+    <script>
+        angular.module("app", ["sprintf"])
+    </script>
+</body>
+</html>