Clarify Best Value route confidence

FuelBoard/FavouritesView.swift

@@ -25,6 +25,7 @@ struct FavouritesView: View {
     /// the same baseline and definition the Stations list uses.
     var savingsForStation: (FuelStation) -> FuelSavingsAvailability? = { _ in nil }
     var savingsBaselineStationName: String?
+    var journeyDiagnosticsForStation: (FuelStation) -> FuelSavingsJourneyDiagnostics? = { _ in nil }
     var onToggleFavourite: (FuelStation, FuelType) -> Void = { _, _ in }
     /// Persists a reordered favourites array (after drag-and-drop).
     var onReorder: ([FavouriteEntry]) -> Void = { _ in }
@@ -84,6 +85,7 @@ struct FavouritesView: View {
          fuelSavingsAmount: Binding<FuelSavingsFillAmount>,
          savingsForStation: @escaping (FuelStation) -> FuelSavingsAvailability? = { _ in nil },
          savingsBaselineStationName: String? = nil,
+         journeyDiagnosticsForStation: @escaping (FuelStation) -> FuelSavingsJourneyDiagnostics? = { _ in nil },
          onToggleFavourite: @escaping (FuelStation, FuelType) -> Void = { _, _ in },
          onReorder: @escaping ([FavouriteEntry]) -> Void = { _ in },
          onHistoryUnavailable: (() -> Void)? = nil,
@@ -98,6 +100,7 @@ struct FavouritesView: View {
         _fuelSavingsAmount = fuelSavingsAmount
         self.savingsForStation = savingsForStation
         self.savingsBaselineStationName = savingsBaselineStationName
+        self.journeyDiagnosticsForStation = journeyDiagnosticsForStation
         self.onToggleFavourite = onToggleFavourite
         self.onReorder = onReorder
         self.onHistoryUnavailable = onHistoryUnavailable
@@ -219,6 +222,7 @@ struct FavouritesView: View {
                     fuelSavings: savingsForStation(station),
                     fuelSavingsAmount: fuelSavingsAmount,
                     savingsBaselineStationName: savingsBaselineStationName,
+                    journeyDiagnostics: journeyDiagnosticsForStation(station),
                     // Every station listed here IS a favourite for the tab's
                     // fuel, so the star starts filled; tapping it unstars.
                     isFavourite: true,