for now hide the fork button in langflow mode

frontend/src/app/chat/page.tsx

@@ -1463,6 +1463,7 @@ function ChatPage() {
                           {renderFunctionCalls(message.functionCalls || [], index)}
                           <p className="text-foreground whitespace-pre-wrap break-words overflow-wrap-anywhere">{message.content}</p>
                         </div>
+                        {endpoint === 'chat' && (
                           <div className="flex-shrink-0 ml-2">
                             <button
                               onClick={(e) => handleForkConversation(index, e)}
@@ -1472,6 +1473,7 @@ function ChatPage() {
                               <GitBranch className="h-3 w-3" />
                             </button>
                           </div>
+                        )}
                       </div>
                     )}
                   </div>