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

Conflicts:
- `README.md`:
  Upstream changed their README, we have our own.
  Kept ours.
- `app/helpers/application_helper.rb`:
  Minor code style fix upstream, on a line that is different in glitch-soc
  due to the different theming system.
  Applied the code style fix to our own code.
- `app/views/settings/preferences/appearance/show.html.haml`:
  Code style fix on a line next to lines exclusive to glitch-soc.
  Applied upstream changes.
- `yarn.lock`:
  Upstream updated a dependency textually close to a glitch-soc-only
  dependency.
  Updated the dependency like upstream did.

app/models/backup.rb

@@ -18,6 +18,6 @@
 class Backup < ApplicationRecord
   belongs_to :user, inverse_of: :backups
 
-  has_attached_file :dump
+  has_attached_file :dump, s3_permissions: 'private'
   validates_attachment_content_type :dump, content_type: /\Aapplication/
 end

app/models/status.rb

@@ -237,16 +237,6 @@ class Status < ApplicationRecord
     public_visibility? || unlisted_visibility?
   end
 
-  def translatable?
-    translate_target_locale = I18n.locale.to_s.split(/[_-]/).first
-
-    distributable? &&
-      content.present? &&
-      language != translate_target_locale &&
-      TranslationService.configured? &&
-      TranslationService.configured.supported?(language, translate_target_locale)
-  end
-
   alias sign? distributable?
 
   def with_media?