Index: frontend/src/pages/UserDetail.tsx
===================================================================
--- frontend/src/pages/UserDetail.tsx	(revision ce45c7a7871379455b3a3c55a48f767ca2e0e739)
+++ frontend/src/pages/UserDetail.tsx	(revision 947fcaadc3ddb75ae7bee1ae398ae0f43c988c1e)
@@ -259,5 +259,5 @@
 
             {/* Follow button - hidden on own profile */}
-            {!isOwnProfile && (
+            {currentUser && !isOwnProfile && (
               <div className="mt-4">
                 <button