TabRe Follow

Members follow each other: a Follow/Unfollow button on every profile, a /following page, and a notification when
someone you follow starts a new topic.

Where it shows up

• a Follow / Unfollow button in the member action row on profiles and member cards (region.member.actions);
• /following: the members you follow, newest first, paginated, each with an Unfollow button;
• a Following link in the user menu (region.header.user_menu);
• notifications: started following you (kind tabre_follow) and started a new topic (kind tabre_follow_topic),
  rendered through the core notification list.

Rules

• You must be signed in; you cannot follow yourself and you cannot follow an inactive member.
• The button is a POST to /follow/{id} with the CSRF token; the back field is limited to a local path.
• A new follower notifies the member once per pair: follow → unfollow → follow does not ring the bell again.
• A new topic notifies every follower of its author in one batch (notify_many()), and only for new topics, not for
  replies or edits. Review-held topics notify when they go public.
• The notification preference of each member is honoured by the core; notifications can be switched off entirely in the
  plugin settings.

Settings

Data and uninstall

One row per edge in plugin_tabre_follow (follower, followee, created_at), unique on the pair, indexed by followee.
Uninstalling drops the table; the notification rows written earlier stay in the core and their links still work.

The manifest uses region.member.actions, region.header.user_menu, topic.after_save, notification.kinds and the
routes /follow/{id} and /following.