CLI registry URL doesn't follow redirects for auth

[crtahlin]

Description

clawhub.ai redirects to www.clawhub.ai (HTTP 307), but the CLI doesn't follow this redirect for authentication requests, causing "Unauthorized" errors.

Steps to Reproduce

npx molthub@latest login --token "valid_token" --no-browser
# Result: Unauthorized

npx molthub@latest login --token "valid_token" --no-browser --registry "https://www.clawhub.ai"
# Result: Success

Root Cause

curl -I https://clawhub.ai/api/v1/me
# HTTP/2 307 → Location: https://www.clawhub.ai/api/v1/me

The CLI doesn't follow this redirect for auth verification.

Impact

Users get confusing "Unauthorized" errors with valid tokens. Must manually specify --registry flag.

Suggested Fix

Either:

1. Follow redirects for all requests including auth
2. Default to www.clawhub.ai
3. Provide clearer error: "Registry redirected to X, retry with --registry X"

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Found during seller flow UX testing