[nstepien]

Stacked on #3967.

Cell events inherit from React's event, but React's stopPropagation() and preventDefault() store their state on the object they're called on. When called on a cell event, they updated the cell event instead of React's event, so:

• stopPropagation() in onCellClick, onCellKeyDown, or another cell event handler didn't stop React from calling parent handlers.
• After preventDefault(), parent handlers saw isDefaultPrevented() return false.

The native event was still updated, so the browser's default action was prevented.

This predates #3967: cell events used to copy React's event, with the same result.

Cell events now call these two methods on React's event. The two new tests failed in all three browsers before the fix.

🤖 Generated with Claude Code

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.36%. Comparing base (6f1f5cf) to head (2e39b26).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4217   +/-   ##
=======================================
  Coverage   98.35%   98.36%           
=======================================
  Files          45       45           
  Lines        1951     1955    +4     
  Branches      727      727           
=======================================
+ Hits         1919     1923    +4     
  Misses         32       32           

Files with missing lines	Coverage Δ
src/utils/eventUtils.ts	100.00% <100.00%> (ø)

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[amanmahajan7]

Nice catch!