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

Conflicts:
- `app/controllers/home_controller.rb`:
  Upstream made it so `/web` is available to non-logged-in users
  and `/` redirects to `/web` instead of `/about`.
  Kept our version since glitch-soc's WebUI doesn't have what's
  needed yet and I think /about is still a much better landing
  page anyway.
- `app/models/form/admin_settings.rb`:
  Upstream added new settings, and glitch-soc had an extra setting.
  Not really a conflict.
  Added upstream's new settings.
- `app/serializers/initial_state_serializer.rb`:
  Upstream added a new `server` initial state object.
  Not really a conflict.
  Merged upstream's changes.
- `app/views/admin/settings/edit.html.haml`:
  Upstream added new settings.
  Not really a conflict.
  Merged upstream's changes.
- `app/workers/scheduler/feed_cleanup_scheduler.rb`:
  Upstream refactored that part and removed the file.
  Ported our relevant changes into `app/lib/vacuum/feeds_vacuum.rb`
- `config/settings.yml`:
  Upstream added new settings.
  Not a real conflict.
  Added upstream's new settings.

app/serializers/rest/admin/account_serializer.rb

@@ -77,6 +77,6 @@ class REST::Admin::AccountSerializer < ActiveModel::Serializer
   end
 
   def ip
-    ips&.first
+    ips&.first&.ip
   end
 end

app/serializers/rest/relationship_serializer.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 class REST::RelationshipSerializer < ActiveModel::Serializer
-  attributes :id, :following, :showing_reblogs, :notifying, :followed_by,
+  attributes :id, :following, :showing_reblogs, :notifying, :languages, :followed_by,
              :blocking, :blocked_by, :muting, :muting_notifications, :requested,
              :domain_blocking, :endorsed, :note
 
@@ -25,6 +25,11 @@ class REST::RelationshipSerializer < ActiveModel::Serializer
       false
   end
 
+  def languages
+    (instance_options[:relationships].following[object.id] || {})[:languages] ||
+      (instance_options[:relationships].requested[object.id] || {})[:languages]
+  end
+
   def followed_by
     instance_options[:relationships].followed_by[object.id] || false
   end

app/serializers/rest/translation_serializer.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class REST::TranslationSerializer < ActiveModel::Serializer
+  attributes :content, :detected_source_language
+
+  def content
+    object.text
+  end
+end