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-script-element/SVGScriptElement.d.ts

@@ -0,0 +1,30 @@
+import * as PropertySymbol from '../../PropertySymbol.js';
+import SVGAnimatedString from '../../svg/SVGAnimatedString.js';
+import SVGGraphicsElement from '../svg-graphics-element/SVGGraphicsElement.js';
+/**
+ * SVG Script Element.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/SVGScriptElement
+ */
+export default class SVGScriptElement extends SVGGraphicsElement {
+    [PropertySymbol.href]: SVGAnimatedString | null;
+    /**
+     * Returns href.
+     *
+     * @returns Href.
+     */
+    get href(): SVGAnimatedString;
+    /**
+     * Returns type.
+     *
+     * @returns Type.
+     */
+    get type(): string;
+    /**
+     * Sets type.
+     *
+     * @param value New value.
+     */
+    set type(value: string);
+}
+//# sourceMappingURL=SVGScriptElement.d.ts.map