Allowed values for the inactiveEffect slot in window.backdropPolicy.*.
'inherit' (the host default) keeps the resolved activeEffect while the
window is unfocused and lets DWM apply its own inactive dimming, so a
theme does not have to re-apply the backdrop on every focus change.
'system' hands the inactive frame back to the platform backdrop.
Allowed values for the
inactiveEffectslot inwindow.backdropPolicy.*.'inherit'(the host default) keeps the resolvedactiveEffectwhile the window is unfocused and lets DWM apply its own inactive dimming, so a theme does not have to re-apply the backdrop on every focus change.'system'hands the inactive frame back to the platform backdrop.