Add generation button for saved exports and improve UI flow

Introduce a Vue.js component to handle the generation of saved exports directly via a new button. Adjust related API endpoints, improve status handling, and remove redundant backend logic. Minor UI enhancements and translation updates included.

src/Bundle/ChillMainBundle/Controller/ExportGenerationController.php

@@ -53,10 +53,6 @@ final readonly class ExportGenerationController
             throw new AccessDeniedHttpException('Only users can download an export');
         }
 
-        if (StoredObject::STATUS_PENDING === $exportGeneration->getStoredObject()->getStatus()) {
-            return new JsonResponse(['status' => 'pending']);
-        }
-
         return new JsonResponse(
             $this->serializer->serialize(
                 $exportGeneration,