上传前端对批量上传的优化建议

### Please make sure of the following things

- [x] I have read the [documentation](https://alist.nn.ci).
- [x] I'm sure there are no duplicate issues or discussions.
- [x] I'm sure this feature is not implemented.
- [x] I'm sure it's a reasonable and popular requirement.

### Description of the feature / 需求描述

当前批量上传前端显示并不够友好，关掉窗口后无法再次打开

建议优化上传提示

### Suggested solution / 实现思路

1. 在有上传任务进行时添加一个悬浮窗以便随时打开查看上传进度
2. 上传完成的文件默认折叠

### Additional context / 附件

_No response_