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

Conflicts:
- `app/views/admin/tags/index.html.haml`:
  Removed upstream while it had changes in glitch-soc to accomodate for the
  theming system.

Additional changes to accomodate for the theming system:
- `app/views/admin/trends/links/preview_card_providers/index.html.haml`
- `app/views/admin/trends/links/index.html.haml`
- `app/views/admin/trends/tags/index.html.haml`
- `app/views/admin/tags/show.html.haml`

app/policies/preview_card_policy.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class PreviewCardPolicy < ApplicationPolicy
+  def index?
+    staff?
+  end
+
+  def update?
+    staff?
+  end
+end

app/policies/preview_card_provider_policy.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class PreviewCardProviderPolicy < ApplicationPolicy
+  def index?
+    staff?
+  end
+
+  def update?
+    staff?
+  end
+end