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/build/helpers/mergeArrays.test.js

@@ -0,0 +1,10 @@
+"use strict";
+
+var _mergeArrays = _interopRequireDefault(require("./mergeArrays.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { "default": e }; }
+describe('mergeArrays', function () {
+  it('should merge arrays', function () {
+    expect((0, _mergeArrays["default"])([1, 2], [2, 3])).to.deep.equal([1, 2, 3]);
+  });
+});
+//# sourceMappingURL=mergeArrays.test.js.map