Fix autofilling of screens in Navigation Tab widgets on the index.bob

[OCopping]

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[codecov]

Codecov Report

❌ Patch coverage is 68.62745% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.53%. Comparing base (a0932ec) to head (cea6b84).

Files with missing lines	Patch %	Lines
src/techui_builder/utils.py	65.95%	16 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #267      +/-   ##
==========================================
- Coverage   96.04%   94.53%   -1.52%     
==========================================
  Files          13       13              
  Lines         986     1006      +20     
==========================================
+ Hits          947      951       +4     
- Misses         39       55      +16     

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