Prevent Ai chats from step settings to appear in Ai Assistant (#1622)

Fixes OPS-3058.
Deployed to UX

## Additional Notes

Author: ravikiranvm

packages/react-ui/src/app/features/ai/lib/assistant-ui-chat-hook.ts

@@ -232,6 +232,10 @@ export const useAssistantChat = ({
       toast(errorToast);
     },
     onFinish: async () => {
+      if (chatMode !== ChatMode.Agent) {
+        return;
+      }
+
       if (!chatId || hasAttemptedNameGenerationRef.current[chatId]) {
         return;
       }