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/dom/dom-matrix/IDOMMatrixCompatibleObject.d.ts

@@ -0,0 +1,25 @@
+export default interface IDOMMatrixCompatibleObject {
+    a?: number;
+    b?: number;
+    c?: number;
+    d?: number;
+    e?: number;
+    f?: number;
+    m11?: number;
+    m12?: number;
+    m13?: number;
+    m14?: number;
+    m21?: number;
+    m22?: number;
+    m23?: number;
+    m24?: number;
+    m31?: number;
+    m32?: number;
+    m33?: number;
+    m34?: number;
+    m41?: number;
+    m42?: number;
+    m43?: number;
+    m44?: number;
+}
+//# sourceMappingURL=IDOMMatrixCompatibleObject.d.ts.map