BINDINGS: list[BindingType] = [Binding(
'escape',
'cancel',
'Cancel',
show=False), Binding('tab'Key bindings for the selector.
Esc dismisses and restores the original theme. Arrow keys and Enter are
handled natively by the embedded OptionList; Tab / Shift+Tab are bound
here to advance the option list cursor for consistency with other
selector screens (where Tab cycles focus across multiple widgets).