Tokken validierung

frontend/src/services/api.js

@@ -4,7 +4,8 @@ const instance = axios.create({
   baseURL: import.meta.env.VITE_API_URL,
 });
 
-instance.interceptors.request.use(config => {
+// 🔐 1. Token automatisch mitsenden (Request-Interceptor)
+instance.interceptors.request.use((config) => {
   const token = localStorage.getItem('token');
   if (token) {
     config.headers.Authorization = `Bearer ${token}`;
@@ -12,4 +13,16 @@ instance.interceptors.request.use(config => {
   return config;
 });
 
+// 🔁 2. Fehler automatisch behandeln (Response-Interceptor)
+instance.interceptors.response.use(
+  response => response,
+  error => {
+    if (error.response && error.response.status === 401) {
+      localStorage.clear();
+      window.location.href = '/login'; // automatisch ausloggen
+    }
+    return Promise.reject(error);
+  }
+);
+
 export default instance;