Move favourite room ids out of the useBetween navigator store into a
dedicated Zustand store. useNavigatorFavourite(roomId) subscribes only
to s.ids.has(roomId) (a boolean), so a FavouriteChangedEvent for one
room no longer re-renders every favourite-aware view. apply() returns
the same state reference when membership is unchanged.
simoleo89
e610cfeef4