Redmine

I propose a feature enhancement for better visibility regarding user permissions and mention notifications. Currently, when a user who does not have the permission to view a particular issue is mentioned, they do not receive a mention notification email. However, this is not visually apparent since the mention link looks identical to others, potentially leading to confusion over whether a notification was sent.

To improve clarity, I suggest altering the background color of mention links for users who cannot view the issue. This visual cue would instantly inform others that the mentioned individual may not be notified due to permission restrictions.