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/chart.js/dist/helpers/helpers.curve.d.ts

@@ -0,0 +1,17 @@
+import type { ChartArea } from '../types/index.js';
+import type { SplinePoint } from '../types/geometric.js';
+export declare function splineCurve(firstPoint: SplinePoint, middlePoint: SplinePoint, afterPoint: SplinePoint, t: number): {
+    previous: SplinePoint;
+    next: SplinePoint;
+};
+/**
+ * This function calculates Bézier control points in a similar way than |splineCurve|,
+ * but preserves monotonicity of the provided data and ensures no local extremums are added
+ * between the dataset discrete points due to the interpolation.
+ * See : https://en.wikipedia.org/wiki/Monotone_cubic_interpolation
+ */
+export declare function splineCurveMonotone(points: SplinePoint[], indexAxis?: 'x' | 'y'): void;
+/**
+ * @private
+ */
+export declare function _updateBezierControlPoints(points: SplinePoint[], options: any, area: ChartArea, loop: boolean, indexAxis: 'x' | 'y'): void;