Improve empty trashcan btn opensight

[daniele-mng]

What

• Added confirmation dialog for emptying out the trashcan with a small delay.

Why

• User have no feedback if emptying out the trashcan was successful.

References

GEA-664

Checklist

• Tests

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Snapshot Warnings

⚠️: No snapshots were found for the head SHA 4d67f0a.

Ensure that dependencies are being submitted on PR branches and consider enabling retry-on-snapshot-warnings. See the documentation for more information and troubleshooting advice.

OpenSSF Scorecard

Package	Version	Score	Details

Scanned Manifest Files

[github-actions]

Conventional Commits Report

Type	Number
Changed	1

🚀 Conventional commits found.

[codecov]

Codecov Report

Attention: Patch coverage is 98.36066% with 1 line in your changes missing coverage. Please review.

Project coverage is 64.34%. Comparing base (40e19d4) to head (4d67f0a).
Report is 2 commits behind head on opensight-ui.

Files with missing lines	Patch %	Lines
src/web/pages/extras/trashcanpage.jsx	98.14%	1 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           opensight-ui    #4165      +/-   ##
================================================
+ Coverage         63.34%   64.34%   +1.00%     
================================================
  Files              1107     1107              
  Lines            103441   103485      +44     
  Branches           6421     6457      +36     
================================================
+ Hits              65522    66592    +1070     
+ Misses            37753    36753    -1000     
+ Partials            166      140      -26     

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