fix: don't make requests for empty list of llm models

[Strum355]

No description provided.

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.00%. Comparing base (e89b140) to head (8cadbd6).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/extension.ts	0.00%	2 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #842      +/-   ##
==========================================
- Coverage   64.09%   64.00%   -0.10%     
==========================================
  Files          32       32              
  Lines        1398     1400       +2     
  Branches      233      234       +1     
==========================================
  Hits          896      896              
- Misses        488      490       +2     
  Partials       14       14              

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