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

frontend/lib/api.ts

@@ -59,7 +59,7 @@ export function isAuthenticated(): boolean {
   return getAuthToken() !== null;
 }
 
-async function apiFetch<T>(
+export async function apiFetch<T>(
   path: string,
   options: RequestInit = {}
 ): Promise<T> {

frontend/lib/i18n.tsx

@@ -1,5 +1,4 @@
 'use client';
-
 import { createContext, useContext, useState, useCallback, type ReactNode } from 'react';
 import deMessages from '@/messages/de.json';
 import enMessages from '@/messages/en.json';