v0.3.4 — CP priority over steps

v0.3.4 — Constant Pressure priority over steps

When Constant Pressure and Steps Mode are both active on the same axis, CP now suppresses steps for any direction where a CP key is assigned. If the CP key for a direction is empty, steps fire as normal.

Example (SubwaySim throttle/brake on a single lever)

Direction	CP key	Steps key	Behaviour
Up (throttle)	A	—	Holds A while stick is forward
Down (brake)	(empty)	D	Fires D once per step as normal

Previously both modes would always run independently. Now CP takes priority per direction, enabling mixed setups on a single axis.