feat(thread-comment): didn't show tips on merge-cell comment

[weird94]

close https://github.com/dream-num/univer-pro/issues/2707

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

 17 passed

Details

 17 tests across 8 suites
 4 minutes, 9 seconds
 7286646
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Codecov Report

Attention: Patch coverage is 0% with 10 lines in your changes missing coverage. Please review.

Project coverage is 32.04%. Comparing base (192da79) to head (7286646).
Report is 8 commits behind head on dev.

Files with missing lines	Patch %	Lines
...trollers/sheets-thread-comment-popup.controller.ts	0.00%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #3819      +/-   ##
==========================================
- Coverage   32.06%   32.04%   -0.03%     
==========================================
  Files        2322     2322              
  Lines      120245   120275      +30     
  Branches    26608    26623      +15     
==========================================
- Hits        38562    38537      -25     
- Misses      81683    81738      +55     

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[wzhudev]

This if-return should comes before L66. BTW, can a selection has no range?