Function detect_long_press 

pub fn detect_long_press(
    cfg: Res<'_, PressConfig>,
    anim: Option<Res<'_, AnimationsActive>>,
    q: Query<'_, '_, (Entity, &mut PressStartedAt), With<Pressed>>,
    events: MessageWriter<'_, LongPressEvent>,
)

Emit LongPressEvent for entities pressed past the threshold. Once per press cycle (gated by PressStartedAt::long_fired).