There is an issue with the NotificationAppService.GetListAsync method in version 3.1.0

The PR has not taken effect
[fix: Add category filter to list count](https://github.com/EasyAbp/PrivateMessaging/commit/0888b85edf4ba12a53baa3d3cdf093173dde3ad2)

<img width="796" height="305" alt="Image" src="https://github.com/user-attachments/assets/253349eb-f7b1-4935-a916-9321bd3ce367" />