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/daisyui/base/rootscrollgutter/index.js

@@ -0,0 +1,7 @@
+import rootscrollgutter from './object.js';
+import { addPrefix } from '../../functions/addPrefix.js';
+
+export default ({ addBase, prefix = '' }) => {
+  const prefixedrootscrollgutter = addPrefix(rootscrollgutter, prefix);
+  addBase({ ...prefixedrootscrollgutter });
+};

frontend/node_modules/daisyui/base/rootscrollgutter/object.js

@@ -0,0 +1 @@
+export default {":root":{"background":"var(--page-scroll-bg, var(--root-bg))","--page-scroll-bg-on":"linear-gradient(var(--root-bg, #0000), var(--root-bg, #0000))\n    color-mix(in srgb, var(--root-bg, #0000), oklch(0% 0 0) calc(var(--page-has-backdrop, 0) * 40%))","--page-scroll-transition-on":"background-color 0.3s ease-out","transition":"var(--page-scroll-transition)","scrollbar-gutter":["var(--page-scroll-gutter, unset)","if(style(--page-has-scroll: 1): var(--page-scroll-gutter, unset) ; else: unset)"]},"@keyframes set-page-has-scroll":{"0%, to":{"--page-has-scroll":"1"}}};