Access the enclosing reference-mode bus — the point/show dimension, the sibling of
useEditMode. Reading re-renders on change; writing goes through the returned setMode (which
targets the same resolved store — never the module-level setReferenceMode from a component,
which always hits the default store).
The reference layer renders whenever a state is present, regardless of mode or activeInput; point
gestures route to ReferenceModeState.activeInput when non-null.
Access the enclosing reference-mode bus — the point/show dimension, the sibling of
useEditMode. Reading re-renders on change; writing goes through the returnedsetMode(which targets the same resolved store — never the module-level setReferenceMode from a component, which always hits the default store).