BINDINGS: list[BindingType] = [Binding(
'escape',
'cancel',
'Cancel',
show=False), Binding(Key bindings for the selector.
Esc dismisses without switching agents. Arrow keys, Enter, and letter
navigation are handled natively by the embedded OptionList; Tab /
Shift+Tab are bound here to advance the cursor for consistency with
other selector screens. Ctrl+S toggles the highlighted agent as the
persisted default.