修改下载报告拼接名字为undefined的问题

src/views/performance/assetssMag.vue

@@ -600,10 +600,11 @@ export default {
           console.log(itemField, "itemField");
         }
 
+        const tempLargeFileBase =
+          itemField.fieldEngineName || itemField.engineTypeCode;
         const objectname =
           itemAnalysis.analysisTypeCode === "temperature_large_components"
-            ? filterAnalysis.filterFileAddr + "/" + itemField.fieldEngineName ||
-              itemField.engineTypeCode + ".jpg"
+            ? `${filterAnalysis.filterFileAddr}/${tempLargeFileBase}.jpg`
             : itemField.engineTypeCode
             ? urlType + itemField.engineTypeCode + ".jpg"
             : urlType + itemField.fieldEngineName + ".jpg";