feat: Reinitialize frontend with SvelteKit and TypeScript

- Delete old Vite+Svelte frontend
- Initialize new SvelteKit project with TypeScript
- Configure Tailwind CSS v4 + DaisyUI
- Implement JWT authentication with auto-refresh
- Create login page with form validation (Zod)
- Add protected route guards
- Update Docker configuration for single-stage build
- Add E2E tests with Playwright (6/11 passing)
- Fix Svelte 5 reactivity with $state() runes

Known issues:
- 5 E2E tests failing (timing/async issues)
- Token refresh implementation needs debugging
- Validation error display timing

frontend/node_modules/happy-dom/cjs/nodes/svg-polyline-element/SVGPolylineElement.d.ts

@@ -0,0 +1,25 @@
+import SVGGeometryElement from '../svg-geometry-element/SVGGeometryElement.cjs';
+import * as PropertySymbol from '../../PropertySymbol.cjs';
+import SVGPointList from '../../svg/SVGPointList.cjs';
+/**
+ * SVG Polyline Element.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/SVGPolylineElement
+ */
+export default class SVGPolylineElement extends SVGGeometryElement {
+    [PropertySymbol.animatedPoints]: SVGPointList | null;
+    [PropertySymbol.points]: SVGPointList | null;
+    /**
+     * Returns animated points.
+     *
+     * @returns Animated points.
+     */
+    get animatedPoints(): SVGPointList;
+    /**
+     * Returns points.
+     *
+     * @returns Points.
+     */
+    get points(): SVGPointList;
+}
+//# sourceMappingURL=SVGPolylineElement.d.ts.map