ToggleGroupSimple/ToggleGroup (single) has no way to prevent deselecting the active item

[aks07]

With type="single", clicking the already-selected item deselects it and fires onChange('') (Radix onItemDeactivate → setValue('')). For a segmented control / view switcher, exactly one option must always remain selected, but there's no prop to enforce this. Consumers have to guard onChange against'.

Expected: a required / disableDeselect option (single mode) that keeps one item always selected.
Workaround: ignore the empty value in onChange.

Screen.Recording.2026-07-02.at.4.15.06.PM.mov