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/svg/SVGNumber.d.ts

@@ -0,0 +1,42 @@
+import * as PropertySymbol from '../PropertySymbol.cjs';
+import BrowserWindow from '../window/BrowserWindow.cjs';
+/**
+ * SVG number.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/SVGNumber
+ */
+export default class SVGNumber {
+    [PropertySymbol.window]: BrowserWindow;
+    [PropertySymbol.getAttribute]: (() => string | null) | null;
+    [PropertySymbol.setAttribute]: ((value: string) => void) | null;
+    [PropertySymbol.attributeValue]: string | null;
+    [PropertySymbol.readOnly]: boolean;
+    /**
+     * Constructor.
+     *
+     * @param illegalConstructorSymbol Illegal constructor symbol.
+     * @param window Window.
+     * @param [options] Options.
+     * @param [options.readOnly] Read only.
+     * @param [options.getAttribute] Get attribute.
+     * @param [options.setAttribute] Set attribute
+     */
+    constructor(illegalConstructorSymbol: symbol, window: BrowserWindow, options?: {
+        readOnly?: boolean;
+        getAttribute?: () => string | null;
+        setAttribute?: (value: string) => void;
+    });
+    /**
+     * Returns value.
+     *
+     * @returns Value.
+     */
+    get value(): number;
+    /**
+     * Sets value.
+     *
+     * @param value Value.
+     */
+    set value(value: number);
+}
+//# sourceMappingURL=SVGNumber.d.ts.map