fix(pro:search): remove name input min-width

[sallerli1]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added/updated or not needed
• Docs and demo have been added/updated or not needed

What is the current behavior?

复合搜索的搜索项名称选择占用了一个min-width

What is the new behavior?

去掉min-width，跟随输入内容变化而变化

Other information

1. 原写法segmentInput 的 class没有生效，做修改，此改动和组件使用无关
2. 搜索项名称的选择浮层下keydown的触发拦截条件改为过滤出的搜索项名称是否为空
3. 阻止segment的点击事件冒泡，防止对上层容器事件监听的影响

[idux-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #1551 (f794c8a) into main (05fdb30) will not change coverage.
The diff coverage is n/a.

❗ Current head f794c8a differs from pull request most recent head 2a54dda. Consider uploading reports for the commit 2a54dda to get more accurate results

@@           Coverage Diff           @@
##             main    #1551   +/-   ##
=======================================
  Coverage   92.78%   92.78%           
=======================================
  Files         331      331           
  Lines       30676    30676           
  Branches     3508     3508           
=======================================
  Hits        28462    28462           
  Misses       2214     2214