bugfix: invitation link copy option disapearing fixed. route problem for unauthorizrd users opening invitation link fixed.

frontend/src/lib/api/client.ts

@@ -15,6 +15,17 @@ export const apiClient = axios.create({
   timeout: 10000,
 });
 
+/** Invitation preview/accept must work with no cookies (public API, no JWT). */
+function isPublicInvitationRequest(url: string | undefined): boolean {
+  if (!url) return false;
+  return (
+    url.includes('/staff/invitations/preview') ||
+    url.includes('/staff/invitations/accept') ||
+    url.includes('/organizations/invitations/preview') ||
+    url.includes('/organizations/invitations/accept')
+  );
+}
+
 // ❌ REMOVE request interceptor completely (no Authorization header)
 
 // ✅ Response interceptor
@@ -23,7 +34,11 @@ apiClient.interceptors.response.use(
   async (error: AxiosError) => {
     const originalRequest = error.config as CustomAxiosRequestConfig;
 
-    if (error.response?.status === 401 && !originalRequest._retry) {
+    if (
+      error.response?.status === 401 &&
+      !originalRequest._retry &&
+      !isPublicInvitationRequest(originalRequest.url)
+    ) {
       originalRequest._retry = true;
 
       try {