fix: update thumbnail URL handling to support webp format

[Tweekazoid]

• wire frame thumbnails had issues loading

[codecov]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 34.19%. Comparing base (fb61521) to head (90c9817).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
ui.py	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2313      +/-   ##
==========================================
- Coverage   34.19%   34.19%   -0.01%     
==========================================
  Files          87       87              
  Lines       27601    27604       +3     
==========================================
  Hits         9438     9438              
- Misses      18163    18166       +3     

Flag	Coverage Δ
python	34.19% <0.00%> (-0.01%)	⬇️

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Files with missing lines	Coverage Δ
ui.py	26.61% <0.00%> (-0.31%)	⬇️

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