Fix undefined apiBase reference in viewer.html

frontend/viewer.html

@@ -1593,8 +1593,7 @@
                                 const resData = job.result;
                                 const modelUrl = resData ? (resData.gltfUrl || resData.glbUrl) : null;
                                 if (modelUrl) {
-                                    const absoluteUrl = modelUrl.startsWith('http') ? modelUrl : `${apiBase}${modelUrl}`;
-                                    loadModelInViewer(absoluteUrl);
+                                    loadModelInViewer(modelUrl);
                                 } else {
                                     alert('¡Modelo 3D creado con éxito! Se ha añadido a tu biblioteca.');
                                 }