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/lib/feed_manager_spec.rb

@@ -134,6 +134,18 @@ RSpec.describe FeedManager do
         reblog = Fabricate(:status, reblog: status, account: jeff)
         expect(FeedManager.instance.filter?(:home, reblog, alice)).to be true
       end
+
+      it 'returns true for German post when follow is set to English only' do
+        alice.follow!(bob, languages: %w(en))
+        status = Fabricate(:status, text: 'Hallo Welt', account: bob, language: 'de')
+        expect(FeedManager.instance.filter?(:home, status, alice)).to be true
+      end
+
+      it 'returns false for German post when follow is set to German' do
+        alice.follow!(bob, languages: %w(de))
+        status = Fabricate(:status, text: 'Hallo Welt', account: bob, language: 'de')
+        expect(FeedManager.instance.filter?(:home, status, alice)).to be false
+      end
     end
 
     context 'for mentions feed' do