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/node_modules/canvas/lib/pattern.js

@@ -0,0 +1,15 @@
+'use strict'
+
+/*!
+ * Canvas - CanvasPattern
+ * Copyright (c) 2010 LearnBoost <tj@learnboost.com>
+ * MIT Licensed
+ */
+
+const bindings = require('./bindings')
+
+module.exports = bindings.CanvasPattern
+
+bindings.CanvasPattern.prototype.toString = function () {
+	return '[object CanvasPattern]'
+}