Output real error instead of generic Gemini CLI stderr was not valid JSON #489

TL;DR

when Gemini API or anything else fails error is generic and not user friendly

Warning: Gemini CLI stderr was not valid JSON
Warning: Gemini CLI stdout was not valid JSON

would be great to see real stderr/stdout instead of generic errors
while there is possible to enable debugging, but with large logs over 30MB (zipped) github doesn't allow to download them (fails in middle)

Detailed design

No response

Additional information

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