feat: station tap action toggle (open map vs more info)

Settings → Units gains a Tap station picker: Open map (default,
historic behaviour — tap opens Apple Maps directions) or More info
(tap shows a detail sheet with name, address, distance from current
location, and a Directions button). Applies to Stations and
Favourites tabs; persisted keychain-first as
fuelboard.stationTapAction. Stations footer hint follows the setting.

FuelBoard/ContentView.swift

@@ -21,6 +21,7 @@ struct ContentView: View {
     @State private var stationLimit: Int = FuelStore.loadStationLimit()
     @State private var distanceUnit: DistanceUnit = FuelStore.loadDistanceUnit()
     @State private var priceDisplayStyle: PriceDisplayStyle = FuelStore.loadPriceDisplayStyle()
+    @State private var stationTapAction: StationTapAction = FuelStore.loadStationTapAction()
     @State private var favourites: [FavouriteEntry] = FuelStore.loadFavourites()
     @State private var alertsEnabled: Bool = FuelStore.loadAlertsEnabled()
     @State private var alertsRadius: Double = FuelStore.loadAlertsRadius()
@@ -742,6 +743,7 @@ struct ContentView: View {
             topStationID: topStationID,
             location: location,
             favouriteIDs: favouriteIDs,
+            stationTapAction: stationTapAction,
             onToggleFavourite: toggleFavourite,
             onRefresh: { await refresh(force: true) }
         )
@@ -756,6 +758,7 @@ struct ContentView: View {
             location: location,
             distanceUnit: distanceUnit,
             priceDisplayStyle: priceDisplayStyle,
+            stationTapAction: stationTapAction,
             onToggleFavourite: toggleFavourite,
             onReorder: reorderFavourites,
             onHistoryUnavailable: { if dataStatus == .live { dataStatus = .connectionProblem } },
@@ -794,6 +797,7 @@ struct ContentView: View {
             tipStore: tipStore,
             distanceUnit: $distanceUnit,
             priceDisplayStyle: $priceDisplayStyle,
+            stationTapAction: $stationTapAction,
             dataRefreshMode: $dataRefreshMode,
             alertsFuel: alertsFuel,
             alertsRadiusKM: alertsRadius,
@@ -931,7 +935,9 @@ struct StationRow: View {
     let baselinePrice: Double?
     let isTopResult: Bool
     let isFavourite: Bool
+    var tapAction: StationTapAction = .openMap
     var onToggleFavourite: () -> Void = {}
+    var onShowDetails: (FuelStation) -> Void = { _ in }
 
     private var ragColor: Color {
         guard let price = station.prices[fuel], let baselinePrice else { return .gray }
@@ -1030,9 +1036,14 @@ struct StationRow: View {
         }
         .contentShape(Rectangle())
         .onTapGesture {
+            switch tapAction {
+            case .openMap:
                 if let url = station.mapsDirectionsURL {
                     UIApplication.shared.open(url)
                 }
+            case .showDetails:
+                onShowDetails(station)
+            }
         }
     }
 }

FuelBoard/FavouritesView.swift

@@ -14,6 +14,7 @@ struct FavouritesView: View {
     let location: Coordinate?
     let distanceUnit: DistanceUnit
     let priceDisplayStyle: PriceDisplayStyle
+    let stationTapAction: StationTapAction
     var onToggleFavourite: (FuelStation, FuelType) -> Void = { _, _ in }
     /// Persists a reordered favourites array (after drag-and-drop).
     var onReorder: ([FavouriteEntry]) -> Void = { _ in }
@@ -37,6 +38,9 @@ struct FavouritesView: View {
     /// Trends sheet (price history chart) presentation state.
     @State private var showTrends = false
 
+    /// Station picked for the More-info sheet (tap action = showDetails).
+    @State private var detailStation: FuelStation?
+
     private var activeFuel: FuelType {
         availableFuels.contains(fuel) ? fuel : (availableFuels.first ?? .e10)
     }
@@ -65,6 +69,7 @@ struct FavouritesView: View {
          location: Coordinate?,
          distanceUnit: DistanceUnit,
          priceDisplayStyle: PriceDisplayStyle,
+         stationTapAction: StationTapAction,
          onToggleFavourite: @escaping (FuelStation, FuelType) -> Void = { _, _ in },
          onReorder: @escaping ([FavouriteEntry]) -> Void = { _ in },
          onHistoryUnavailable: (() -> Void)? = nil,
@@ -74,6 +79,7 @@ struct FavouritesView: View {
         self.location = location
         self.distanceUnit = distanceUnit
         self.priceDisplayStyle = priceDisplayStyle
+        self.stationTapAction = stationTapAction
         self.onToggleFavourite = onToggleFavourite
         self.onReorder = onReorder
         self.onHistoryUnavailable = onHistoryUnavailable
@@ -129,7 +135,9 @@ struct FavouritesView: View {
                                 baselinePrice: cheapestPrice,
                                 isTopResult: index == 0,
                                 isFavourite: activeFuelFavouriteIDs.contains(station.id),
-                                onToggleFavourite: { onToggleFavourite(station, activeFuel) }
+                                tapAction: stationTapAction,
+                                onToggleFavourite: { onToggleFavourite(station, activeFuel) },
+                                onShowDetails: { detailStation = $0 }
                             )
                         }
                         .onMove(perform: moveFavourite)
@@ -171,6 +179,13 @@ struct FavouritesView: View {
                     onHistoryRecovered: onHistoryRecovered
                 )
             }
+            .sheet(item: $detailStation) { station in
+                StationDetailView(
+                    station: station,
+                    location: location,
+                    distanceUnit: distanceUnit
+                )
+            }
             .onAppear {
 #if DEBUG
                 // QA hook: launch with `-showTrends` to open the sheet

FuelBoard/SettingsView.swift

@@ -18,6 +18,7 @@ struct SettingsView: View {
     @ObservedObject var tipStore: TipStore
     @Binding var distanceUnit: DistanceUnit
     @Binding var priceDisplayStyle: PriceDisplayStyle
+    @Binding var stationTapAction: StationTapAction
     @Binding var dataRefreshMode: DataRefreshMode
     /// The fuel + radius currently configured for alerts (mirrors the Alerts
     /// tab) so the test notification matches what real alerts will say.
@@ -117,10 +118,19 @@ struct SettingsView: View {
                         WidgetCenter.shared.reloadAllTimelines()
                         WatchSyncManager.shared.pushSnapshot()
                     }
+                    Picker("Tap station", selection: $stationTapAction) {
+                        ForEach(StationTapAction.allCases) { action in
+                            Text(action.displayName).tag(action)
+                        }
+                    }
+                    .pickerStyle(.segmented)
+                    .onChange(of: stationTapAction) { _, newValue in
+                        FuelStore.saveStationTapAction(newValue)
+                    }
                 } header: {
                     Text("Units")
                 } footer: {
-                    Text("Distances and search radii across the app, widget and alerts are shown in this unit. Prices can be shown as on a station sign (129.9) or in pounds and pence (£1.29⁹/L).")
+                    Text("Distances and search radii across the app, widget and alerts are shown in this unit. Prices can be shown as on a station sign (129.9) or in pounds and pence (£1.29⁹/L). Tapping a station either opens directions straight away or shows its details first.")
                 }
 
                 Section {

FuelBoard/StationDetailView.swift

@@ -0,0 +1,47 @@
+import SwiftUI
+import UIKit
+
+/// Detail sheet for a tapped station (when Settings → Tap station = More info).
+/// Shows the station name, address, distance from the current location, and a
+/// Directions button that opens Apple Maps — the same destination a direct tap
+/// would have opened.
+struct StationDetailView: View {
+    let station: FuelStation
+    let location: Coordinate?
+    let distanceUnit: DistanceUnit
+    @Environment(\.dismiss) private var dismiss
+
+    var body: some View {
+        NavigationStack {
+            List {
+                Section {
+                    LabeledContent("Name", value: station.name)
+                    LabeledContent("Address", value: "\(station.address), \(station.postcode)")
+                    if let location {
+                        let km = FuelStore.displayDistanceKM(
+                            station: station, userLat: location.lat, userLng: location.lng
+                        )
+                        LabeledContent("Distance", value: distanceUnit.format(km))
+                            .monospacedDigit()
+                    }
+                }
+                Section {
+                    Button {
+                        if let url = station.mapsDirectionsURL {
+                            UIApplication.shared.open(url)
+                        }
+                    } label: {
+                        Label("Directions", systemImage: "arrow.triangle.turn.up.right.diamond.fill")
+                    }
+                }
+            }
+            .navigationTitle(station.name)
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbar {
+                ToolbarItem(placement: .cancellationAction) {
+                    Button("Done") { dismiss() }
+                }
+            }
+        }
+    }
+}

FuelBoard/StationsView.swift

@@ -15,6 +15,7 @@ struct StationsView: View {
     let topStationID: String?
     let location: Coordinate?
     let favouriteIDs: Set<String>
+    let stationTapAction: StationTapAction
     var onToggleFavourite: (FuelStation, FuelType) -> Void = { _, _ in }
     var onRefresh: () async -> Void = {}
 
@@ -29,6 +30,9 @@ struct StationsView: View {
     /// info button in the header — keeps the list focused on stations.
     @State private var showKey = false
 
+    /// Station picked for the More-info sheet (tap action = showDetails).
+    @State private var detailStation: FuelStation?
+
     /// Bottom-of-tab explainer (moved from the top 2026-08-16): mode/radius/
     /// directions context + "N/TOTAL stations updated". The numerator is the
     /// current list pool; the denominator is the full UK station total from
@@ -38,6 +42,9 @@ struct StationsView: View {
         let unit = distanceUnit.label(for: Double(miles))
         let fuel = selectedFuel.displayName
         let mode = sortMode == .closest ? "Closest" : "Cheapest"
+        let tapHint = stationTapAction == .openMap
+            ? "tap a station for directions."
+            : "tap a station for details."
         let ratio: String
         if let total = FuelStore.loadStationCount() {
             ratio = "\(totalCount)/\(total)"
@@ -48,9 +55,9 @@ struct StationsView: View {
             if sortMode == .closest {
                 return "\(mode) \(fuel) stations — nearest first, best value within \(miles) \(unit) · \(ratio) stations updated"
             }
-            return "\(mode) \(fuel) within \(miles) \(unit) — \(ratio) stations updated · tap a station for directions."
+            return "\(mode) \(fuel) within \(miles) \(unit) — \(ratio) stations updated · \(tapHint)"
         }
-        return "\(mode) \(fuel) — \(ratio) stations updated · tap a station for directions."
+        return "\(mode) \(fuel) — \(ratio) stations updated · \(tapHint)"
     }
 
     var body: some View {
@@ -126,7 +133,9 @@ struct StationsView: View {
                                 baselinePrice: baselinePrice,
                                 isTopResult: station.id == topStationID,
                                 isFavourite: favouriteIDs.contains(station.id),
-                                onToggleFavourite: { onToggleFavourite(station, selectedFuel) }
+                                tapAction: stationTapAction,
+                                onToggleFavourite: { onToggleFavourite(station, selectedFuel) },
+                                onShowDetails: { detailStation = $0 }
                             )
                         }
 
@@ -260,6 +269,13 @@ struct StationsView: View {
                 .presentationDetents([.fraction(0.6)])
                 .presentationBackground(Color(UIColor.systemGroupedBackground))
             }
+            .sheet(item: $detailStation) { station in
+                StationDetailView(
+                    station: station,
+                    location: location,
+                    distanceUnit: distanceUnit
+                )
+            }
         }
     }
 

FuelBoard/en.lproj/Localizable.strings

@@ -56,6 +56,13 @@
 "Units" = "Units";
 "Price display" = "Price display";
 "Distances and search radii across the app, widget and alerts are shown in this unit. Prices can be shown as on a station sign (129.9) or in pounds and pence (£1.29⁹/L)." = "Distances and search radii across the app, widget and alerts are shown in this unit. Prices can be shown as on a station sign (129.9) or in pounds and pence (£1.29⁹/L).";
+"Tap station" = "Tap station";
+"Open map" = "Open map";
+"More info" = "More info";
+"Name" = "Name";
+"Address" = "Address";
+"Distance" = "Distance";
+"Distances and search radii across the app, widget and alerts are shown in this unit. Prices can be shown as on a station sign (129.9) or in pounds and pence (£1.29⁹/L). Tapping a station either opens directions straight away or shows its details first." = "Distances and search radii across the app, widget and alerts are shown in this unit. Prices can be shown as on a station sign (129.9) or in pounds and pence (£1.29⁹/L). Tapping a station either opens directions straight away or shows its details first.";
 "Show introduction" = "Replay onboarding";
 "Replay the welcome screen, including the location and notification permission prompts." = "Replay the welcome screen, including the location and notification permission prompts.";
 "Test alert notification (real data)" = "Test alert notification (real data)";

Shared/FuelStore.swift

@@ -208,6 +208,25 @@ enum PriceDisplayStyle: String, Codable, CaseIterable, Identifiable {
     }
 }
 
+// MARK: - Station tap action
+
+/// What happens when a station row is tapped in the Stations/Favourites tabs:
+/// open Apple Maps directions immediately (historic behaviour, default), or
+/// show a detail sheet (name, address, distance, Directions button).
+enum StationTapAction: String, Codable, CaseIterable, Identifiable {
+    case openMap    // tap → Apple Maps directions straight away
+    case showDetails // tap → detail sheet, Directions button inside
+
+    var id: String { rawValue }
+
+    var displayName: String {
+        switch self {
+        case .openMap: return "Open map"
+        case .showDetails: return "More info"
+        }
+    }
+}
+
 // MARK: - Station model
 
 struct FuelStation: Identifiable, Codable, Equatable {
@@ -542,6 +561,22 @@ struct FuelStore {
         saveString(style.rawValue, service: priceDisplayStyleKey)
     }
 
+    // MARK: Station tap action — open map vs detail sheet. Stored raw value;
+    // default open map preserves the historic tap behaviour for existing installs.
+
+    static let stationTapActionKey = "fuelboard.stationTapAction"
+
+    static func loadStationTapAction() -> StationTapAction {
+        if let raw = loadString(service: stationTapActionKey), let action = StationTapAction(rawValue: raw) {
+            return action
+        }
+        return .openMap
+    }
+
+    static func saveStationTapAction(_ action: StationTapAction) {
+        saveString(action.rawValue, service: stationTapActionKey)
+    }
+
     /// Superscript digit glyphs for the pounds & pence format's small raised
     /// third digit (the forecourt style: "£1.29⁹").
     private static let superscriptDigits: [Character] = ["⁰", "¹", "²", "³", "⁴", "⁵", "⁶", "⁷", "⁸", "⁹"]