curl -X POST "https://app.talkover.ai/api/v1/calendars" \
  -H "Authorization: Bearer talq_your_environment_token_here" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Sales Demo Calendar",
    "timezone": "America/Sao_Paulo",
    "owner_id": "user-uuid-1"
  }'

{
  "success": true,
  "data": {
    "id": "calendar-uuid-1",
    "name": "Sales Demo Calendar",
    "timezone": "America/Sao_Paulo",
    "owner_id": "user-uuid-1",
    "created_at": "2024-01-15T18:00:00Z"
  }
}