Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- app/controllers/admin/base_controller.rb
- app/controllers/filters_controller.rb
- app/controllers/invites_controller.rb
- app/controllers/settings/deletes_controller.rb
- app/controllers/settings/exports_controller.rb
- app/controllers/settings/follower_domains_controller.rb
- app/controllers/settings/migrations_controller.rb
- app/controllers/settings/notifications_controller.rb
- app/controllers/settings/preferences_controller.rb
- app/controllers/settings/two_factor_authentication/recovery_codes_controller.rb
- app/javascript/packs/public.js
- app/views/settings/profiles/show.html.haml

Conflicts were mostly due to the addition of body classes to the settings page,
this was caused by rejecting upstream changes for most of those files and
modifying Settings::BaseController instead.

Another cause of conflicts was the deletion of client-side checking of
display name / bio length, this was modified in app/javascript/core/settings.js
instead.

app/lib/activitypub/activity/create.rb

@@ -81,11 +81,22 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
       @mentions << Mention.new(account: account, silent: true)
 
       # If there is at least one silent mention, then the status can be considered
-      # as a limited-audience status, and not strictly a direct message
+      # as a limited-audience status, and not strictly a direct message, but only
+      # if we considered a direct message in the first place
       next unless @params[:visibility] == :direct
 
       @params[:visibility] = :limited
     end
+
+    # If the payload was delivered to a specific inbox, the inbox owner must have
+    # access to it, unless they already have access to it anyway
+    return if @options[:delivered_to_account_id].nil? || @mentions.any? { |mention| mention.account_id == @options[:delivered_to_account_id] }
+
+    @mentions << Mention.new(account_id: @options[:delivered_to_account_id], silent: true)
+
+    return unless @params[:visibility] == :direct
+
+    @params[:visibility] = :limited
   end
 
   def attach_tags(status)