* refactor(cli): remove Vertex AI auth step and add gcloud project listing retry
The Vertex AI auth step only offered one option (use existing ADC credentials)
making it a redundant click. Remove it and go straight to project selection.
When gcloud project listing fails (e.g. expired credentials), show a
diagnostic message and offer a "Retry" option instead of silently falling
back to an empty list.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* refactor(cli): show gcloud project listing errors inline in the prompt
Move the gcloud failure message into the select prompt instead of writing
it to stdout separately, and highlight it with yellow ANSI coloring so
users notice the remediation steps.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Instead of spawning an interactive gcloud login flow, tell users to run
gcloud auth application-default login themselves before continuing. Also
adds a Vertex-specific model list and spinner progress for LLM health
checks.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Update every setup step to write completed_steps to .ktx/setup/state.json
instead of ktx.yaml, stripping legacy entries from config on write.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
