Arterial line waveform

Add a continuous arterial blood pressure waveform as a simple toggle. Our regular blood pressure reading only updates when the cuff cycles, but this would show a live pressure trace that moves with every heartbeat.

We tested this on a competitor app. It is just a single on or off switch with no extra setup. When turned on, a red waveform appears along with a number that matches the actual systolic and diastolic values already set, plus the calculated mean arterial pressure. When turned off, the waveform and number both disappear.

This would help in advanced or critical care scenarios where students need to read blood pressure continuously instead of waiting for the cuff to cycle. It should be a fairly easy build since we already have similar waveforms for pleth and capnography. We would just need to keep the reading tied to the live systolic and diastolic sliders.