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

Conflicts:
- `README.md`:
  Discarded upstream changes: we have our own README
- `app/controllers/follower_accounts_controller.rb`:
  Port upstream's minor refactoring

app/serializers/initial_state_serializer.rb

@@ -30,7 +30,7 @@ class InitialStateSerializer < ActiveModel::Serializer
       streaming_api_base_url: Rails.configuration.x.streaming_api_base_url,
       access_token: object.token,
       locale: I18n.locale,
-      domain: instance_presenter.domain,
+      domain: Addressable::IDNA.to_unicode(instance_presenter.domain),
       title: instance_presenter.title,
       admin: object.admin&.id&.to_s,
       search_enabled: Chewy.enabled?,