Feature: Mention Users in Comments & Send Email Notifications

[Phuldev]

Describe the feature you'd like

I have added a new feature to the BookStack project that allows users to mention other users in the comment box using the @username format.
When a user is mentioned, they will automatically receive an email notification.

Describe the benefits this would bring to existing BookStack users

Feature Details

• Users can type @username in the comment box.
• The system automatically detects the mentioned username.
• It fetches the corresponding user's email address from the database.
• An email notification is sent to the mentioned user, containing:

The comment text
The name of the commenter
A direct link to the related BookStack page

Can the goal of this request already be achieved via other means?

No, currently BookStack does not provide any built-in feature to mention users in comments or send email notifications when they are tagged. The existing comment system only allows adding text, and users are not notified when someone mentions them.

This feature request introduces:

1. @username detection in comments
2. Automatic email notifications to mentioned users

There’s no alternative or existing method to achieve this functionality without modifying the core code.

Have you searched for an existing open/closed issue?

• I have searched for existing issues and none cover my fundamental request

How long have you been using BookStack?

Under 3 months

Additional context

[ssddanbrown]

Hi @Phuldev,
There's already a feature request for this kind of thing via #560.

If this was supposed to be a PR, feel free to open a PR but it may be closed, especially if the implementation is relatively minimal (basic core implementation without addressing the more complex challenges).