fix(core): redudant drop target register

[pengx17]

fix the following issue.
root cause is that options.element is being reused when cleaning up, but if its value comes from a ref, it might be null at that point.

[pengx17]

• fix(core): redudant drop target register #9177 👈 (View in Graphite)
• canary

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[nx-cloud]

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 65.46%. Comparing base (2f79104) to head (7b03875).
Report is 1 commits behind head on canary.

Files with missing lines	Patch %	Lines
...kages/frontend/component/src/ui/dnd/drop-target.ts	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           canary    #9177      +/-   ##
==========================================
- Coverage   65.47%   65.46%   -0.01%     
==========================================
  Files         721      721              
  Lines       41157    41160       +3     
  Branches     4032     4033       +1     
==========================================
- Hits        26947    26945       -2     
- Misses      13781    13786       +5     
  Partials      429      429              

Flag	Coverage Δ
server-test	77.80% <ø> (ø)
unittest	35.74% <0.00%> (-0.01%)	⬇️

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[graphite-app]

Merge activity

• Dec 16, 5:37 AM EST: A user merged this pull request with the Graphite merge queue.