use SystemTime;
use Result;
use cratePack;
use crateSceneState;
/// Anything that can paint a `SceneState` for a user. Real renderers
/// (terminal half-block, web canvas, PNG, GIF) all need scene + pack +
/// clock; layout is intentionally NOT in the trait — the half-block TUI
/// recomputes layout per frame from terminal size, and fixed-canvas
/// renderers compute theirs once at construction. Forcing layout through
/// the trait would mean every caller carries a value half the impls
/// ignore.