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/es6/helpers/getPossibleCountriesForNumber.js

@@ -0,0 +1,28 @@
+import Metadata from '../metadata.js';
+
+/**
+ * Returns a list of countries that the phone number could potentially belong to.
+ * @param  {string} callingCode — Calling code.
+ * @param  {string} nationalNumber — National (significant) number.
+ * @param  {object} metadata — Metadata.
+ * @return {string[]} A list of possible countries.
+ */
+export default function getPossibleCountriesForNumber(callingCode, nationalNumber, metadata) {
+  var _metadata = new Metadata(metadata);
+  var possibleCountries = _metadata.getCountryCodesForCallingCode(callingCode);
+  if (!possibleCountries) {
+    return [];
+  }
+  return possibleCountries.filter(function (country) {
+    return couldNationalNumberBelongToCountry(nationalNumber, country, metadata);
+  });
+}
+function couldNationalNumberBelongToCountry(nationalNumber, country, metadata) {
+  var _metadata = new Metadata(metadata);
+  _metadata.selectNumberingPlan(country);
+  if (_metadata.numberingPlan.possibleLengths().indexOf(nationalNumber.length) >= 0) {
+    return true;
+  }
+  return false;
+}
+//# sourceMappingURL=getPossibleCountriesForNumber.js.map