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
         }