add set media fields

backend/app/Controllers/SetController.php

@@ -25,13 +25,20 @@ class SetController
     }
 
     /**
-     * @return array{id: int, name: string}
+     * @return array{
+     *     id: int,
+     *     name: string,
+     *     description: string,
+     *     iconImageUrl: string
+     * }
      */
     private function buildSetPayload(DomainSet $set): array
     {
         return [
             'id' => $set->getId(),
             'name' => $set->getName(),
+            'description' => $set->getDescription(),
+            'iconImageUrl' => $set->getIconImageUrl(),
         ];
     }
 }