Clarify fuel savings comparison labels

FuelBoard/FavouritesView.swift

@@ -24,7 +24,6 @@ struct FavouritesView: View {
     /// Estimated saving for a favourite, against the nearest eligible station —
     /// 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).
@@ -84,7 +83,6 @@ struct FavouritesView: View {
          fuelSavingsSettings: FuelSavingsSettings = .defaults,
          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 },
@@ -99,7 +97,6 @@ struct FavouritesView: View {
         self.fuelSavingsSettings = fuelSavingsSettings
         _fuelSavingsAmount = fuelSavingsAmount
         self.savingsForStation = savingsForStation
-        self.savingsBaselineStationName = savingsBaselineStationName
         self.journeyDiagnosticsForStation = journeyDiagnosticsForStation
         self.onToggleFavourite = onToggleFavourite
         self.onReorder = onReorder
@@ -221,7 +218,6 @@ struct FavouritesView: View {
                     distanceUnit: distanceUnit,
                     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.