feat: T04 fixes - i18n, auth tests, contact/vehicle test cleanup, status updates

frontend/tests/setup.ts

@@ -1,15 +1,25 @@
 import '@testing-library/jest-dom';
 import { vi } from 'vitest';
 
-// Mock next/navigation globally
+// Mock localStorage
+const localStorageMock = (() => {
+  let store: Record<string, string> = {};
+  return {
+    getItem: (key: string) => store[key] || null,
+    setItem: (key: string, value: string) => { store[key] = value; },
+    removeItem: (key: string) => { delete store[key]; },
+    clear: () => { store = {}; },
+  };
+})();
+Object.defineProperty(window, 'localStorage', { value: localStorageMock });
+
+// Mock next/navigation
 vi.mock('next/navigation', () => ({
   useRouter: () => ({
     push: vi.fn(),
     replace: vi.fn(),
     back: vi.fn(),
-    refresh: vi.fn(),
   }),
-  redirect: vi.fn(),
-  usePathname: () => '/login',
+  usePathname: () => '/',
   useSearchParams: () => new URLSearchParams(),
 }));