perf(editor): optimize the search for the closest element

[fundon]

Closes: BS-2275

[fundon]

• perf(editor): optimize the search for the closest element #9587 👈 (View in Graphite)
• canary

---

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[codecov]

Codecov Report

Attention: Patch coverage is 45.94595% with 60 lines in your changes missing coverage. Please review.

Project coverage is 52.74%. Comparing base (5ff2254) to head (2950926).
Report is 10 commits behind head on canary.

Files with missing lines	Patch %	Lines
...components/src/drag-indicator/file-drop-manager.ts	48.64%	38 Missing ⚠️
...te/affine/shared/src/utils/dnd/calc-drop-target.ts	0.00%	12 Missing ⚠️
...suite/affine/widget-drag-handle/src/drag-handle.ts	62.50%	6 Missing ⚠️
...uite/affine/shared/src/utils/dom/point-to-block.ts	60.00%	2 Missing ⚠️
...ksuite/affine/block-database/src/database-block.ts	0.00%	1 Missing ⚠️
...get-drag-handle/src/watchers/drag-event-watcher.ts	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           canary    #9587      +/-   ##
==========================================
+ Coverage   52.69%   52.74%   +0.05%     
==========================================
  Files        2176     2176              
  Lines       97595    97591       -4     
  Branches    16619    16621       +2     
==========================================
+ Hits        51427    51476      +49     
+ Misses      44723    44664      -59     
- Partials     1445     1451       +6     

Flag	Coverage Δ
server-test	78.02% <ø> (ø)
unittest	32.41% <15.31%> (+0.07%)	⬆️

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