Function apply_disabled_bindings 

pub fn apply_disabled_bindings(
    store: Res<'_, PropertyStore>,
    commands: Commands<'_, '_>,
    q: Query<'_, '_, (Entity, &BindDisabled, Has<Disabled>)>,
    new_binds: Query<'_, '_, (), Added<BindDisabled>>,
)

Copies PropertyStore[Global(name)] into the presence of the Disabled marker for every BindDisabled entity: truthy inserts, falsy removes. Recognises Bool plus the canonical "true" / "1" string aliases via get_global_bool. A missing signal leaves the entity untouched (its spawn-time disabled attribute keeps authority until the signal exists).

Downstream reactions - stripping Hovered / Pressed / focus and the :disabled style swap - key off the marker add/remove (lumen_primitives::eject_interaction_on_disable and apply_state_visuals).