hiccup-xu

Results 2 issues of hiccup-xu

测试时发现,多个文件同时下载,前两个文件会把带宽用完,导致第三个以后的文件速度直接为零 ![VeryCapture_20231017155027](https://github.com/eyebluecn/tank/assets/75781702/da8b8629-2390-4696-adfb-0a0e469f79e1) ![VeryCapture_20231017154913](https://github.com/eyebluecn/tank/assets/75781702/96fb7335-8ee4-4cf8-98e7-19acc542c4bc)

![VeryCapture_20231105231523](https://github.com/qiniu/kodo-browser/assets/75781702/4c310f47-c6a6-4c20-97c5-ec5b07172aef) 别家早实现了缩略图功能 ![VeryCapture_20231105231742](https://github.com/qiniu/kodo-browser/assets/75781702/b53feeb0-ef45-42af-af93-175056a174a2)

enhancement