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-canvas-element/ImageBitmap.js

@@ -0,0 +1,26 @@
+/**
+ * Image Bitmap.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/ImageBitmap
+ */
+export default class ImageBitmap {
+    height;
+    width;
+    /**
+     * Constructor.
+     *
+     * @param width Width.
+     * @param height Height.
+     */
+    constructor(width, height) {
+        this.width = width;
+        this.height = height;
+    }
+    /**
+     * Disposes of all graphical resources associated with an ImageBitmap.
+     */
+    close() {
+        // TODO: Not implemented.
+    }
+}
+//# sourceMappingURL=ImageBitmap.js.map