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/bindings.js

@@ -0,0 +1,43 @@
+'use strict'
+
+const bindings = require('../build/Release/canvas.node')
+
+module.exports = bindings
+
+Object.defineProperty(bindings.Canvas.prototype, Symbol.toStringTag, {
+  value: 'HTMLCanvasElement',
+  configurable: true
+})
+
+Object.defineProperty(bindings.Image.prototype, Symbol.toStringTag, {
+  value: 'HTMLImageElement',
+  configurable: true
+})
+
+bindings.ImageData.prototype.toString = function () {
+	return '[object ImageData]'
+}
+
+Object.defineProperty(bindings.ImageData.prototype, Symbol.toStringTag, {
+  value: 'ImageData',
+  configurable: true
+})
+
+bindings.CanvasGradient.prototype.toString = function () {
+	return '[object CanvasGradient]'
+}
+
+Object.defineProperty(bindings.CanvasGradient.prototype, Symbol.toStringTag, {
+  value: 'CanvasGradient',
+  configurable: true
+})
+
+Object.defineProperty(bindings.CanvasPattern.prototype, Symbol.toStringTag, {
+  value: 'CanvasPattern',
+  configurable: true
+})
+
+Object.defineProperty(bindings.CanvasRenderingContext2d.prototype, Symbol.toStringTag, {
+  value: 'CanvasRenderingContext2d',
+  configurable: true
+})