fix(pro:search): segment input width measure is incorrect

[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?

搜索项的input宽度计算不准确

What is the new behavior?

修复以上问题

Other information

计算的时候使用了input元素的父元素的样式，实际上应该使用input元素的样式进行计算

[idux-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.87%. Comparing base (76feba4) to head (34359b1).

Additional details and impacted files

@@            Coverage Diff            @@
##             main    #1985     +/-   ##
=========================================
  Coverage   90.87%   90.87%             
=========================================
  Files         358      358             
  Lines       35826    35826             
  Branches     3901     2872   -1029     
=========================================
  Hits        32558    32558             
  Misses       3268     3268             

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.