fix: pointer always pops up when sending and receiving messages

[hfdem]

The "New Messages" pointer pops up both when sending messages continuously and receiving messages. #77 (comment)

This patch fix it. But when sending and receiving messages very quickly, issues may still occur.

Changing scroll-behavior: smooth; to scroll-behavior: auto; in client/src/components/Messaging/styles/ScrollWrapper.module.css can significantly alleviate the problem.

However, considering the smoothness of the scrolling experience and the fact that only a few users will send or receive messages at such a high speed, no changes are made at this time.

[hfdem]

  useEffect(() => {
    if (!isAtBottom && messageCount > 0) {
      setShowPopup(true);
    }
  }, [messageCount]);

[eslint] 
src/components/Messaging/ScrollWrapper.tsx
  Line [43](https://github.com/muke1908/chat-e2ee/actions/runs/10326709544/job/28590689666?pr=360#step:5:44):6:  React Hook useEffect has a missing dependency: 'isAtBottom'. Either include it or remove the dependency array  react-hooks/exhaustive-deps

This syntax is valid, and it’s intentionally designed with this logic, so there’s no issue.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud