chore: 修改默认返回值类型

src/utils/index.tsx

@@ -522,7 +522,7 @@ export interface FileData {
 export function normalizeFiledata(url: string): FileData
 export function normalizeFiledata(url: any): any {
   if (!url) {
-    return url;
+    return {};
   }
   const splited = url.split('/');
   const fileName = splited && splited.length ? splited[splited.length - 1] : '';