options := []ziva.Item{
    {Key: "option1", Name: "Option 1", Description: "First environment"},
    {Key: "option2", Name: "Option 2", Description: "Second environment"},
    {Key: "option3", Name: "Option 3"},
}
task := ziva.NewSingleSelectTask("Title", options)

task := ziva.NewSingleSelectTask("Environment Selection", environments).
    WithDefaultItem("staging").                    // default by key
    WithTimeout(10*time.Second, "production").     // timeout with fallback
    WithViewport(5, true).                         // limit visible items
    WithItemsDisabled([]string{"maintenance"})     // disable by key

// After task execution
selected := task.GetSelected()      // string - selected key
index := task.GetSelectedIndex()    // int - selected item index

options := []ziva.Item{
    {Key: "dev", Name: "Development", Description: "Non-production sandbox"},
    {Key: "staging", Name: "Staging", Description: "Pre-production tests"},
    {Key: "prod", Name: "Production"},
}