//! Route-save decisions.
//!
//! A `/model` or `/provider` change is temporary by default. The explicit
//! persistence choices are offered as a NON-BLOCKING band in the status area
//! (u = update this Fleet, n = save as a new Fleet, d = remember as my
//! default, k = keep for this session only). Nothing is written until the
//! user presses one of those keys — a scripted or automated terminal is never
//! interrupted by a modal.
/// The explicit persistence choice.