feat: honour Tap station action in widgets

Small widgetURL and medium list Links route through
StationTapAction via FuelStation.tapDestinationURL: Open map
keeps the Maps URL, More info uses a fuelboard://station
deep link (stationID plus coordinate/name fallback).

Deep link carries fallback coords; ContentView presents the
detail sheet when the station is cached, else the map sheet.
Live Activity detailURL upgraded to the same rich link.

FuelBoard/ContentView.swift

@@ -243,9 +243,21 @@ struct ContentView: View {
                     )
                 }
                 .onReceive(NotificationCenter.default.publisher(for: .fuelBoardShowStationDetail)) { note in
-                    guard let id = note.userInfo?["stationID"] as? String,
-                          let station = stations.first(where: { $0.id == id }) else { return }
-                    monitor.pendingDetailStation = station
+                    let info = note.userInfo ?? [:]
+                    if let id = info["stationID"] as? String,
+                       let station = stations.first(where: { $0.id == id }) {
+                        monitor.pendingDetailStation = station
+                        return
+                    }
+                    // Station left the cache — fall back to the map sheet so
+                    // the tap still shows something.
+                    if let lat = info["stationLat"] as? Double,
+                       let lng = info["stationLng"] as? Double {
+                        let name = info["stationName"] as? String ?? "Station"
+                        monitor.pendingStationMap = StationMapRequest(
+                            name: name, latitude: lat, longitude: lng
+                        )
+                    }
                 }
         )
     }

FuelBoard/FuelBoardApp.swift

@@ -69,20 +69,35 @@ struct FuelBoardApp: App {
     /// `http://maps.apple.com` form is also handled, from very old timelines.
     /// In CarPlay the widget uses the same `maps://` URL, which routes to
     /// Apple Maps without ever launching this app.
-    /// A `fuelboard://station?stationID=…` link (from a Live Activity tap when
-    /// Settings → Tap station = More info) posts a notification that
-    /// ContentView observes to present the detail sheet.
+    /// A `fuelboard://station?stationID=…&lat=…&lng=…&name=…` link (from a
+    /// widget or Live Activity tap when Settings → Tap station = More info)
+    /// posts a notification that ContentView observes to present the detail
+    /// sheet (falling back to the map sheet when the station has left
+    /// the cache).
     private func handleOpenURL(_ url: URL) {
         guard let components = URLComponents(url: url, resolvingAgainstBaseURL: false)
         else { return }
 
         if components.scheme == "fuelboard",
-           components.host == "station",
-           let id = components.queryItems?.first(where: { $0.name == "stationID" })?.value {
+           components.host == "station" {
+            let items = components.queryItems ?? []
+            var userInfo: [String: Any] = [:]
+            if let id = items.first(where: { $0.name == "stationID" })?.value {
+                userInfo["stationID"] = id
+            }
+            if let lat = items.first(where: { $0.name == "lat" })?.value.flatMap(Double.init) {
+                userInfo["stationLat"] = lat
+            }
+            if let lng = items.first(where: { $0.name == "lng" })?.value.flatMap(Double.init) {
+                userInfo["stationLng"] = lng
+            }
+            if let name = items.first(where: { $0.name == "name" })?.value {
+                userInfo["stationName"] = name
+            }
             NotificationCenter.default.post(
                 name: .fuelBoardShowStationDetail,
                 object: nil,
-                userInfo: ["stationID": id]
+                userInfo: userInfo
             )
             return
         }

FuelBoardWidgets/FuelBoardLiveActivityView.swift

@@ -2,7 +2,8 @@
 //
 // Lives in the widget extension (the standard host for ActivityConfiguration).
 // Shows the cheapest station for the pinned fuel within the app's chosen
-// radius. Tapping anywhere opens Apple Maps directions to that station.
+// radius. Tapping honours Settings → Tap station: Open map opens Apple Maps
+// directions to that station, More info opens the detail sheet in the app.
 //
 // ADAPTIVE LAYOUT: the Lock Screen body provides two layouts and lets
 // ViewThatFits pick by available width, but the narrow `.small` family is NOT
@@ -254,8 +255,19 @@ extension FuelBoardLiveActivityAttributes.ContentState {
     }
 
     /// In-app deep link to the station's detail sheet, used when
-    /// Settings → Tap station = More info.
+    /// Settings → Tap station = More info. Carries coordinate/name fallback
+    /// so the app can still show the map sheet when the station has left
+    /// the cache.
     var detailURL: URL {
-        URL(string: "fuelboard://station?stationID=\(stationID)")!
+        var components = URLComponents()
+        components.scheme = "fuelboard"
+        components.host = "station"
+        components.queryItems = [
+            URLQueryItem(name: "stationID", value: stationID),
+            URLQueryItem(name: "lat", value: String(lat)),
+            URLQueryItem(name: "lng", value: String(lng)),
+            URLQueryItem(name: "name", value: stationName),
+        ]
+        return components.url!
     }
 }

Shared/FuelBoardLiveActivity.swift

@@ -9,7 +9,9 @@
 // in Settings → Live Activity (INDEPENDENT of the Stations-tab selection).
 // Everything dynamic lives in ContentState so updates — including a fuel
 // change — apply to the running activity without needing to restart it.
-// Tapping the activity opens Apple Maps driving directions (maps://).
+// Tapping the activity honours Settings → Tap station: Open map opens Apple
+// Maps driving directions (maps://), More info opens the detail sheet in
+// the app (fuelboard://station).
 
 import ActivityKit
 import Foundation

Shared/FuelPriceWidgetViews.swift

@@ -99,7 +99,7 @@ struct FuelPriceWidgetContent: View {
             }
         }
         .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .leading)
-        .modifier(WidgetURLModifier(url: isWidget ? station.widgetDirectionsURL : nil))
+        .modifier(WidgetURLModifier(url: isWidget ? station.tapDestinationURL : nil))
     }
 
     /// How many station rows each family can fit: medium widgets are short
@@ -129,7 +129,7 @@ struct FuelPriceWidgetContent: View {
             }
             ForEach(entry.stations.prefix(maxRows)) { station in
                 if isWidget {
-                    Link(destination: station.widgetDirectionsURL ?? URL(string: "maps://")!) {
+                    Link(destination: station.tapDestinationURL ?? URL(string: "maps://")!) {
                         row(station, cheapest: cheapest)
                     }
                     .buttonStyle(.plain)

Shared/FuelStore.swift

@@ -271,6 +271,30 @@ struct FuelStation: Identifiable, Codable, Equatable {
         URL(string: "maps://?daddr=\(lat),\(lng)&t=d")
     }
 
+    /// In-app deep link to this station's More info sheet. Carries the
+    /// stationID plus coordinate/name fallback so the app can still show the
+    /// map sheet when the station has left the cache.
+    var detailDeepLinkURL: URL? {
+        var components = URLComponents()
+        components.scheme = "fuelboard"
+        components.host = "station"
+        components.queryItems = [
+            URLQueryItem(name: "stationID", value: id),
+            URLQueryItem(name: "lat", value: String(lat)),
+            URLQueryItem(name: "lng", value: String(lng)),
+            URLQueryItem(name: "name", value: name),
+        ]
+        return components.url
+    }
+
+    /// Widget/Live Activity tap destination honouring Settings → Tap station:
+    /// Open map → Apple Maps directions; More info → in-app detail deep link.
+    var tapDestinationURL: URL? {
+        FuelStore.loadStationTapAction() == .showDetails
+            ? detailDeepLinkURL
+            : widgetDirectionsURL
+    }
+
     /// Name of the bundled brand logo asset, or nil if unknown.
     /// Normalizes messy raw brand strings ("SHELL LEEDS ROAD" → "shell").
     var brandImageName: String? {