fix(facade): insert empty text error

[weird94]

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

 23 passed

Details

 23 tests across 10 suites
 5 minutes, 14 seconds
 fc67e64
 For more information, see full report

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 32.60%. Comparing base (fcf5bbf) to head (fc67e64).
Report is 1 commits behind head on dev.

Files with missing lines	Patch %	Lines
...ages/core/src/docs/data-model/rich-text-builder.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #4465      +/-   ##
==========================================
- Coverage   32.61%   32.60%   -0.01%     
==========================================
  Files        2575     2575              
  Lines      133707   133708       +1     
  Branches    29740    29741       +1     
==========================================
  Hits        43602    43602              
- Misses      90105    90106       +1     

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