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/theme/nord/index.js

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

frontend/node_modules/daisyui/theme/nord/object.js

@@ -0,0 +1 @@
+export default {"color-scheme":"light","--color-base-100":"oklch(95.127% 0.007 260.731)","--color-base-200":"oklch(93.299% 0.01 261.788)","--color-base-300":"oklch(89.925% 0.016 262.749)","--color-base-content":"oklch(32.437% 0.022 264.182)","--color-primary":"oklch(59.435% 0.077 254.027)","--color-primary-content":"oklch(11.887% 0.015 254.027)","--color-secondary":"oklch(69.651% 0.059 248.687)","--color-secondary-content":"oklch(13.93% 0.011 248.687)","--color-accent":"oklch(77.464% 0.062 217.469)","--color-accent-content":"oklch(15.492% 0.012 217.469)","--color-neutral":"oklch(45.229% 0.035 264.131)","--color-neutral-content":"oklch(89.925% 0.016 262.749)","--color-info":"oklch(69.207% 0.062 332.664)","--color-info-content":"oklch(13.841% 0.012 332.664)","--color-success":"oklch(76.827% 0.074 131.063)","--color-success-content":"oklch(15.365% 0.014 131.063)","--color-warning":"oklch(85.486% 0.089 84.093)","--color-warning-content":"oklch(17.097% 0.017 84.093)","--color-error":"oklch(60.61% 0.12 15.341)","--color-error-content":"oklch(12.122% 0.024 15.341)","--radius-selector":"1rem","--radius-field":"0.25rem","--radius-box":"0.5rem","--size-selector":"0.25rem","--size-field":"0.25rem","--border":"1px","--depth":"0","--noise":"0"};