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/lib/nodes/svg-animation-element/SVGAnimationElement.d.ts

@@ -0,0 +1,38 @@
+import SVGElement from '../svg-element/SVGElement.js';
+import SVGStringList from '../../svg/SVGStringList.js';
+import * as PropertySymbol from '../../PropertySymbol.js';
+import Event from '../../event/Event.js';
+/**
+ * SVG Animation Element.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/SVGAnimationElement
+ */
+export default class SVGAnimationElement extends SVGElement {
+    [PropertySymbol.requiredExtensions]: SVGStringList | null;
+    [PropertySymbol.systemLanguage]: SVGStringList | null;
+    get onbegin(): ((event: Event) => void) | null;
+    set onbegin(value: ((event: Event) => void) | null);
+    get onend(): ((event: Event) => void) | null;
+    set onend(value: ((event: Event) => void) | null);
+    get onrepeat(): ((event: Event) => void) | null;
+    set onrepeat(value: ((event: Event) => void) | null);
+    /**
+     * Returns required extensions.
+     *
+     * @returns Required extensions.
+     */
+    get requiredExtensions(): SVGStringList;
+    /**
+     * Returns system language.
+     *
+     * @returns System language.
+     */
+    get systemLanguage(): SVGStringList;
+    /**
+     * Returns target element.
+     *
+     * @returns Target element.
+     */
+    get targetElement(): SVGElement | null;
+}
+//# sourceMappingURL=SVGAnimationElement.d.ts.map