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

Conflicts:
- `app/controllers/statuses_controller.rb`:
  Minor conflict due to theming system

app/policies/announcement_policy.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class AnnouncementPolicy < ApplicationPolicy
+  def index?
+    staff?
+  end
+
+  def create?
+    admin?
+  end
+
+  def update?
+    admin?
+  end
+
+  def destroy?
+    admin?
+  end
+end