fix(ui): optimize resize observer and update toolbar item structure of Ribbon

[jikkai]

close #xxx

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).

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Playwright test results

 24 passed

Details

 24 tests across 11 suites
 5 minutes, 31 seconds
 d572a84
 For more information, see full report

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 13 lines in your changes missing coverage. Please review.

Project coverage is 32.69%. Comparing base (0a0aafe) to head (d572a84).
Report is 1 commits behind head on dev.

Files with missing lines	Patch %	Lines
packages/ui/src/views/components/ribbon/Ribbon.tsx	0.00%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #4644      +/-   ##
==========================================
- Coverage   32.71%   32.69%   -0.02%     
==========================================
  Files        2604     2604              
  Lines      135575   135576       +1     
  Branches    30157    30157              
==========================================
- Hits        44348    44327      -21     
- Misses      91227    91249      +22     

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