[Feature Request] Show BG prediction trend line in watch app

[Ailandini]

Is your feature request related to a problem? Please describe.
When bolusing in the watch app, there’s a great UI for setting a number of carbs and units of insulin, or just providing units of insulin, however, unlike the iOS app, there is no BG prediction line to show how the suggested or selected amount of insulin is going to effect my numbers. I generally use this prediction to decide whether to increase or decrease bolus size.

Describe the solution you'd like
it would be great to show the trend line, similar to how it’s displayed in the app, just above the amount of insulin. And to have that line update as the number of units is tweaked.

Describe alternatives you've considered
the only real alternative is to guess and then check the trend line on the watch home page, or to just give all boluses through the iOS app instead of on watch.

Additional context
I took a brief stab at implementing this and found it was a little more difficult than just pasting the prediction graph from the home interface onto the CarbAndBolusFlowController since the graph is written in SpriteKit and the CABFC is written in SwiftUI, but I’d be willing to take another stab at it if a dev was willing to pair on it with me. There were a number of not-so obvious nuances with the code.

Here is a crude screenshot of the desired feature, if it isn’t clear from my description: