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/views/home/index.html.haml

@@ -1,10 +1,14 @@
 - content_for :header_tags do
-  = preload_pack_asset 'features/getting_started.js', crossorigin: 'anonymous'
-  = preload_pack_asset 'features/compose.js', crossorigin: 'anonymous'
-  = preload_pack_asset 'features/home_timeline.js', crossorigin: 'anonymous'
-  = preload_pack_asset 'features/notifications.js', crossorigin: 'anonymous'
+  - if user_signed_in?
+    = preload_pack_asset 'features/getting_started.js', crossorigin: 'anonymous'
+    = preload_pack_asset 'features/compose.js', crossorigin: 'anonymous'
+    = preload_pack_asset 'features/home_timeline.js', crossorigin: 'anonymous'
+    = preload_pack_asset 'features/notifications.js', crossorigin: 'anonymous'
+
+  = render partial: 'shared/og'
 
   %meta{name: 'applicationServerKey', content: Rails.configuration.x.vapid_public_key}
+
   = render_initial_state
 
 .notranslate.app-holder#mastodon{ data: { props: Oj.dump(default_props) } }