fix(devtools): modernize MouseEvent initialization

[NaokiHaba]

resolve #xxx

Description

Replaced deprecated initMouseEvent method with modern MouseEvent constructor for better compatibility and future-proofing

The initMouseEvent method has been officially deprecated in favor of the more modern MouseEvent constructor. This change:

References:

• https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/MouseEvent
• https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/initMouseEvent

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[pkg-pr-new]

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commit: c24a17d

[posva]

Seems good to me!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.34%. Comparing base (3b21e08) to head (c24a17d).
Report is 9 commits behind head on v3.

Additional details and impacted files

@@            Coverage Diff             @@
##               v3    #2930      +/-   ##
==========================================
+ Coverage   91.23%   91.34%   +0.10%     
==========================================
  Files          17       17              
  Lines        1381     1398      +17     
  Branches      211      211              
==========================================
+ Hits         1260     1277      +17     
  Misses        120      120              
  Partials        1        1              

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[NaokiHaba]

Seems good to me!

Thank you! I appreciate your review. I'm glad to have your approval.