curl --request PUT \
  --url https://api.agentixx.io/api/settings/ai \
  --header 'Content-Type: application/json' \
  --header 'x-tenant-id: <api-key>' \
  --cookie better-auth.session_token= \
  --data '
{
  "defaultProvider": "openai",
  "defaultModel": "gpt-4.1-mini",
  "temperature": 0.7
}
'

{
  "ok": true
}