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.

spec/controllers/api/v1/accounts_controller_spec.rb

@@ -145,6 +145,17 @@ RSpec.describe Api::V1::AccountsController, type: :controller do
         expect(json[:showing_reblogs]).to be false
         expect(json[:notifying]).to be true
       end
+
+      it 'changes languages option' do
+        post :follow, params: { id: other_account.id, languages: %w(en es) }
+
+        json = body_as_json
+
+        expect(json[:following]).to be true
+        expect(json[:showing_reblogs]).to be false
+        expect(json[:notifying]).to be false
+        expect(json[:languages]).to match_array %w(en es)
+      end
     end
   end