[Copilot]

When Blendkit-Client cannot start its local TCP server, the generic network error gives users little help diagnosing the failure.

• Diagnostics: For startup exit code 41, describe possible localhost restrictions or unavailable ports, suggest checking firewall permissions and trying another port, and point to the Client log.
• Regression coverage: Check that the message includes troubleshooting guidance and the log path.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 35.21%. Comparing base (dc3c4cf) to head (1e20e8f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2344      +/-   ##
==========================================
+ Coverage   35.19%   35.21%   +0.02%     
==========================================
  Files          87       87              
  Lines       27798    27806       +8     
==========================================
+ Hits         9784     9793       +9     
+ Misses      18014    18013       -1     

Flag	Coverage Δ
python	35.21% <100.00%> (+0.02%)	⬆️

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Files with missing lines	Coverage Δ
client_lib.py	60.08% <100.00%> (+0.21%)	⬆️
tests/test_client_lib.py	97.01% <100.00%> (+0.06%)	⬆️

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