refactor(core): remove dndkit in split view

[pengx17]

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[pengx17]

• refactor(core): remove dndkit in split view #9487 👈 (View in Graphite)
• canary

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[codecov]

Codecov Report

Attention: Patch coverage is 3.50877% with 55 lines in your changes missing coverage. Please review.

Project coverage is 52.87%. Comparing base (4457cb7) to head (3094aa8).

Files with missing lines	Patch %	Lines
...kages/frontend/component/src/ui/dnd/drop-target.ts	3.22%	30 Missing ⚠️
...ages/frontend/component/src/utils/shallow-equal.ts	0.00%	14 Missing ⚠️
packages/frontend/component/src/ui/dnd/monitor.tsx	8.33%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           canary    #9487      +/-   ##
==========================================
- Coverage   52.91%   52.87%   -0.05%     
==========================================
  Files        2151     2153       +2     
  Lines       96989    97026      +37     
  Branches    16154    16165      +11     
==========================================
- Hits        51322    51302      -20     
- Misses      44300    44324      +24     
- Partials     1367     1400      +33     

Flag	Coverage Δ
server-test	78.07% <ø> (-0.07%)	⬇️
unittest	32.48% <3.50%> (-0.02%)	⬇️

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