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-report-system/node_modules/luxon/src/errors.js

@@ -0,0 +1,61 @@
+// these aren't really private, but nor are they really useful to document
+
+/**
+ * @private
+ */
+class LuxonError extends Error {}
+
+/**
+ * @private
+ */
+export class InvalidDateTimeError extends LuxonError {
+  constructor(reason) {
+    super(`Invalid DateTime: ${reason.toMessage()}`);
+  }
+}
+
+/**
+ * @private
+ */
+export class InvalidIntervalError extends LuxonError {
+  constructor(reason) {
+    super(`Invalid Interval: ${reason.toMessage()}`);
+  }
+}
+
+/**
+ * @private
+ */
+export class InvalidDurationError extends LuxonError {
+  constructor(reason) {
+    super(`Invalid Duration: ${reason.toMessage()}`);
+  }
+}
+
+/**
+ * @private
+ */
+export class ConflictingSpecificationError extends LuxonError {}
+
+/**
+ * @private
+ */
+export class InvalidUnitError extends LuxonError {
+  constructor(unit) {
+    super(`Invalid unit ${unit}`);
+  }
+}
+
+/**
+ * @private
+ */
+export class InvalidArgumentError extends LuxonError {}
+
+/**
+ * @private
+ */
+export class ZoneIsAbstractError extends LuxonError {
+  constructor() {
+    super("Zone is an abstract class");
+  }
+}