fix(editor): fix styles in editor tab extra

[mortalYoung]

简介

• 修复 tab 在某些情况下样式移位的问题

主要变更

• 优化 tabExtra 组件的 DOM 结构
• 优化样式

Related Issues

Closed #731

[codecov]

Codecov Report

Merging #736 (ec062ca) into main (61b1753) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #736   +/-   ##
=======================================
  Coverage   91.34%   91.34%           
=======================================
  Files         189      189           
  Lines        5947     5947           
  Branches     1426     1425    -1     
=======================================
  Hits         5432     5432           
  Misses        508      508           
  Partials        7        7           

Impacted Files	Coverage Δ
src/components/tabs/tabExtra.tsx	100.00% <ø> (ø)
src/components/tabs/tab.tsx	100.00% <100.00%> (ø)

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