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/html-image-element/Image.js

@@ -0,0 +1,30 @@
+import HTMLImageElement from './HTMLImageElement.js';
+import * as PropertySymbol from '../../PropertySymbol.js';
+import NamespaceURI from '../../config/NamespaceURI.js';
+/**
+ * Image as constructor.
+ *
+ * Reference:
+ * https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement/Image.
+ */
+export default class Image extends HTMLImageElement {
+    [PropertySymbol.tagName] = 'IMG';
+    [PropertySymbol.localName] = 'img';
+    [PropertySymbol.namespaceURI] = NamespaceURI.html;
+    /**
+     * Constructor.
+     *
+     * @param [width] Width.
+     * @param [height] Height.
+     */
+    constructor(width = null, height = null) {
+        super();
+        if (width !== null) {
+            this.width = width;
+        }
+        if (height !== null) {
+            this.height = height;
+        }
+    }
+}
+//# sourceMappingURL=Image.js.map