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/libphonenumber-js/source/helpers/matchesEntirely.test.js

@@ -0,0 +1,11 @@
+import matchesEntirely from './matchesEntirely.js'
+
+describe('matchesEntirely', () => {
+	it('should work in edge cases', () => {
+		// No text.
+		expect(matchesEntirely(undefined, '')).to.equal(true)
+
+		// "OR" in regexp.
+		expect(matchesEntirely('911231231', '4\d{8}|[1-9]\d{7}')).to.equal(false)
+	})
+})