Restore predicted carb-effect line on ICE and food-insight charts

The carb-effect chart on the Carb Absorption screen and the Favorite Foods
insights screen lost their predicted carb-effect line in the Tidepool
stateless-algorithm refactor. `dynamicGlucoseEffects(from: end, ...)`
generated effects only from now+1h forward, but the chart's visible window
ends at roughly now+1h — so the two ranges only touched at a single point
and nothing rendered.

Widen the output sampling window to `from: start` at both call sites
(carb-absorption review and historical-charts data). The carb-absorption
model itself is unchanged; only the sample window grows to span the chart.

No dosing-path impact: the main Loop algorithm runs through LoopAlgorithm
(SPM), not these UI-only helpers.

Reported by @marionbarker in LoopKit/LoopWorkspace#213.

Author: Pete Schwamb

Loop/Managers/LoopDataManager+CarbAbsorption.swift

@@ -86,7 +86,7 @@ extension LoopDataManager {
         )
 
         let carbEffects = carbStatus.dynamicGlucoseEffects(
-            from: end,
+            from: start,
             to: end.addingTimeInterval(InsulinMath.defaultInsulinActivityDuration),
             carbRatios: carbRatioWithOverrides,
             insulinSensitivities: sensitivityWithOverrides,

Loop/Managers/LoopDataManager.swift

@@ -1507,7 +1507,7 @@ extension LoopDataManager: FavoriteFoodInsightsViewModelDelegate {
         )
 
         let carbEffects = carbStatus.dynamicGlucoseEffects(
-            from: end,
+            from: start,
             to: end.addingTimeInterval(InsulinMath.defaultInsulinActivityDuration),
             carbRatios: carbRatioWithOverrides,
             insulinSensitivities: sensitivityWithOverrides,