Delete user's message from the server when they leave the server. Currently it shows Unknown for a person that leaves and their message <img width="187" height="99" alt="Image" src="https://github.com/user-attachments/assets/9e10d51f-a752-4f2d-aad3-36f8db00a66f" />
Delete user's message from the server when they leave the server. Currently it shows Unknown for a person that leaves and their message