fix: 修复多图片上传组件JS出错的bug

src/components/Upload/MultiUpload.vue

@@ -64,6 +64,11 @@ watch(
       return;
     }
 
+    if (newVal.length <= 0) {
+      fileList.value = [];
+      return;
+    }
+
     fileList.value = newVal.map((filePath) => {
       return { url: filePath } as UploadUserFile;
     });