Module focus 

Keyboard focus management — framework-agnostic.

FocusManager maintains an ordered list of focusable component IDs (collected via depth-first traversal of the component tree) and provides Tab / Shift-Tab cycling. It depends only on core types, so every backend (ratatui, Slint, …) shares a single implementation.

Backends with native focus (e.g. Slint) may still use this to reproduce the ratatui Tab order in tests, or to drive focus when native focus is disabled.

Structs

FocusManager

Manages keyboard focus across interactive components.

Constants

FOCUSABLE_TYPES

Component types that can receive keyboard focus.