fix type

src/modules/admin/contest/check/components/ReportDialog.vue

@@ -16,8 +16,8 @@ onMounted(() => {
   fetchReport()
 })
 // office文件
-const getUrl = (url) => {
-  const fileExtensionName = url.split('.').pop()
+const getUrl = (url: string) => {
+  const fileExtensionName = url.split('.').pop() || ''
   return ['pptx', 'doc', 'docx', 'xls', 'xlsx'].includes(fileExtensionName)
     ? `https://view.officeapps.live.com/op/view.aspx?src=${url}`
     : url