fix(sheets-ui): handle floating object clipboard copy

[wpxp123456]

close #7588

Pull Request Checklist

• Related tickets or issues have been linked in the PR description (or missing issue).
• Naming convention is followed (do please check it especially when you created new plugins, commands and resources).
• Unit tests have been added for the changes (if applicable).
• Breaking changes have been documented (or no breaking changes introduced in this PR).

[github-actions]

Playwright test results

 12 passed

Details

 12 tests across 5 suites
 4 minutes, 41 seconds
 ebef742
 For more information, see full report and artifacts

[codecov]

Codecov Report

❌ Patch coverage is 78.88889% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.18%. Comparing base (e48e155) to head (ebef742).

Files with missing lines	Patch %	Lines
...controllers/sheet-drawing-copy-paste.controller.ts	81.81%	10 Missing ⚠️
...llers/sheet-drawing-group-copy-paste.controller.ts	0.00%	7 Missing ⚠️
...ets-ui/src/services/clipboard/clipboard.service.ts	92.85%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #7598      +/-   ##
==========================================
+ Coverage   81.17%   81.18%   +0.01%     
==========================================
  Files        2702     2702              
  Lines      169845   169885      +40     
  Branches    42030    41986      -44     
==========================================
+ Hits       137870   137921      +51     
+ Misses      31927    31916      -11     
  Partials       48       48              

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