Add in-app notifications for moderation actions/warnings (#30065)

app/serializers/rest/account_warning_serializer.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+class REST::AccountWarningSerializer < ActiveModel::Serializer
+  attributes :id, :action, :text, :status_ids, :created_at
+
+  has_one :target_account, serializer: REST::AccountSerializer
+  has_one :appeal, serializer: REST::AppealSerializer
+
+  def id
+    object.id.to_s
+  end
+
+  def status_ids
+    object&.status_ids&.map(&:to_s)
+  end
+end