perf: 补充注释

src/utils/auth.ts

@@ -35,7 +35,7 @@ export function getToken(): DataInfo<number> {
 export function setToken(data: DataInfo<Date>) {
   let expires = 0;
   const { accessToken, refreshToken } = data;
-  expires = new Date(data.expires).getTime();
+  expires = new Date(data.expires).getTime(); // 如果后端直接设置时间戳，将此处代码改为expires = data.expires，然后把上面的DataInfo<Date>改成DataInfo<number>即可
   const cookieString = JSON.stringify({ accessToken, expires });
 
   expires > 0