style: adjust z-index values for layout components

[erha19]

Types

• 💄 Style Changes

Background or solution

不应该硬编码层级关系，将层级关系由子组件自行控制

Changelog

adjust z-index values for layout components

[railway-app]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 55.33%. Comparing base (30f81b6) to head (19820bc).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3769   +/-   ##
=======================================
  Coverage   55.32%   55.33%           
=======================================
  Files        1540     1540           
  Lines       93915    93915           
  Branches    19282    19290    +8     
=======================================
+ Hits        51960    51967    +7     
+ Misses      34811    34805    -6     
+ Partials     7144     7143    -1     

Flag	Coverage Δ
jsdom	50.79% <ø> (+<0.01%)	⬆️
node	15.56% <ø> (ø)

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