UI/UX 过滤器设置

我注意到双重border, padding缺失，圆角接圆角的问题

建议参考 https://element-plus.org/en-US/component/input.html#mixed-input

（上面的结果需要直接写css而不是用component）

The issue identifies double borders, missing padding, and adjacent rounded corners in the filter UI, and points to Element Plus's mixed-input example. No source file, entry point, or test is named, so first locate the filter UI styles and compare them with the reference. Done means the filter controls match the intended border, padding, and corner treatment.

Written by the indexing model from the issue text.