[ps2]

Current Setup always showed "–" for Insulin per Day since the change.

SetupComparison only counts insulin when the dose history reaches the end of the period (end <= history.end). The history ends when it was loaded. The comparison was then made with a fresh now() a moment later, so the "since change" period always ran past the history's end.

CurrentSetupViewModel now takes the time once in load(), before the data loads, and compares against that, also when another change is selected later.

New test testCurrentSetupShowsInsulinPerDaySinceTheChange runs the view model with a clock that moves on with every reading:

• Without the fix, Insulin per Day is empty.
• With it, Insulin per Day is 24 U/day.

The existing SetupComparison tests passed a fixed now, so they didn't catch this.

SetupComparisonTests pass, run on the Loop that LoopWorkspace next-dev pins (29928c1) with this commit on top. Loop's next-dev tip needs a G7SensorKit change the workspace doesn't have yet.

Before the change, from when the dose records start

The second commit stops "Before" being blank whenever the dose records start a few days into the 3 weeks before the change. The average now runs from when the records start, as long as that leaves at least 2 weeks. A note under the row says from when.

On a phone whose records start around Oct 5, a change on Oct 24 needs records from Oct 3, so "Before" was blank. It now shows about 19 days' average.

Two new tests:

• Records starting 18 days before the change average over those 18 days and give their start date.
• Records starting 10 days before the change still give nothing.

SetupComparisonTests (11) pass.