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/svg/SVGAnimatedLength.d.ts

@@ -0,0 +1,53 @@
+import * as PropertySymbol from '../PropertySymbol.js';
+import SVGLength from './SVGLength.js';
+import BrowserWindow from '../window/BrowserWindow.js';
+/**
+ * SVG Animated Length.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/SVGAnimatedLength
+ */
+export default class SVGAnimatedLength {
+    [PropertySymbol.window]: BrowserWindow;
+    [PropertySymbol.getAttribute]: () => string;
+    [PropertySymbol.setAttribute]: (value: string) => void;
+    [PropertySymbol.baseVal]: SVGLength | null;
+    [PropertySymbol.animVal]: SVGLength | null;
+    /**
+     * Constructor.
+     *
+     * @param illegalConstructorSymbol Illegal constructor symbol.
+     * @param window Window.
+     * @param options Options.
+     * @param options.getAttribute Get attribute.
+     * @param options.setAttribute Set attribute.
+     */
+    constructor(illegalConstructorSymbol: symbol, window: BrowserWindow, options: {
+        getAttribute: () => string | null;
+        setAttribute: (value: string) => void;
+    });
+    /**
+     * Returns animated value.
+     *
+     * @returns Animated value.
+     */
+    get animVal(): SVGLength;
+    /**
+     * Returns animated value.
+     *
+     * @param value Animated value.
+     */
+    set animVal(_value: SVGLength);
+    /**
+     * Returns base value.
+     *
+     * @returns Base value.
+     */
+    get baseVal(): SVGLength;
+    /**
+     * Returns base value.
+     *
+     * @param value Base value.
+     */
+    set baseVal(_value: SVGLength);
+}
+//# sourceMappingURL=SVGAnimatedLength.d.ts.map