Live Activity: own fuel + distance config, independent of Stations tab

- Settings → Live Activity now has Fuel and Distance pickers (5/10/15,
  unit-aware) stored under fuelboard.liveActivityFuel / liveActivityRadiusMiles
- LiveActivityManager uses these instead of the Stations-tab selectedFuel /
  stationLimit; Stations changes no longer re-target the pill
- Fuel moved from Activity attributes into ContentState so changing fuel in
  Settings updates the RUNNING activity in place (no end+restart needed)
- Stations tab stays a pure data-interrogation + favourites surface

FuelBoard/ContentView.swift

@@ -15,6 +15,8 @@ struct ContentView: View {
     @State private var alertsRadius: Double = FuelStore.loadAlertsRadius()
     @State private var alertsFuel: FuelType = FuelStore.loadAlertsFuel()
     @State private var liveActivityEnabled: Bool = FuelStore.loadLiveActivityEnabled()
+    @State private var liveActivityFuel: FuelType = FuelStore.loadLiveActivityFuel()
+    @State private var liveActivityRadiusMiles: Int = FuelStore.loadLiveActivityRadiusMiles()
     @State private var location: Coordinate? = {
         if let loc = FuelStore.loadLocation() { return Coordinate(lat: loc.lat, lng: loc.lng) }
         return nil
@@ -251,7 +253,6 @@ struct ContentView: View {
         .onChange(of: selectedFuel) { _, _ in
             // No re-fetch needed — one response carries E5/E10/DIESEL prices.
             WidgetCenter.shared.reloadAllTimelines()
-            updateLiveActivity()
         }
         .onChange(of: stationLimit) { _, newValue in
             // Distance filter is LOCAL math now — the cache holds the full-UK
@@ -260,7 +261,6 @@ struct ContentView: View {
             // next render.
             FuelStore.saveStationLimit(newValue)
             WidgetCenter.shared.reloadAllTimelines()
-            updateLiveActivity()
         }
         .onChange(of: alertsEnabled) { _, newValue in
             FuelStore.saveAlertsEnabled(newValue)
@@ -289,6 +289,16 @@ struct ContentView: View {
             FuelStore.saveLiveActivityEnabled(newValue)
             updateLiveActivity()
         }
+        .onChange(of: liveActivityFuel) { _, newValue in
+            // The pill tracks its OWN fuel — independent of the Stations tab.
+            FuelStore.saveLiveActivityFuel(newValue)
+            updateLiveActivity()
+        }
+        .onChange(of: liveActivityRadiusMiles) { _, newValue in
+            // Same for its own radius (miles, converted at use).
+            FuelStore.saveLiveActivityRadiusMiles(newValue)
+            updateLiveActivity()
+        }
         .onChange(of: distanceUnit) { _, _ in
             // Distance unit changes the radius — mirror the new radius in the
             // Live Activity immediately.
@@ -298,13 +308,13 @@ struct ContentView: View {
 
     /// Pushes the current best-in-radius station into the Live Activity.
     /// No-op (or ends the activity) when the toggle is off or there's no
-    /// location/data yet. Mirrors the app list's TOP badge: selected fuel +
-    /// chosen distance radius, cheapest then nearest on ties.
+    /// location/data yet. Uses the Live Activity's OWN fuel + radius (set in
+    /// Settings) — independent of the Stations-tab fuel/distance.
     private func updateLiveActivity() {
         LiveActivityManager.update(
             stations: stations,
-            fuel: selectedFuel,
-            radiusKM: distanceUnit.toKM(Double(stationLimit)),
+            fuel: liveActivityFuel,
+            radiusKM: distanceUnit.toKM(Double(liveActivityRadiusMiles)),
             location: location,
             enabled: liveActivityEnabled
         )
@@ -316,6 +326,8 @@ struct ContentView: View {
         SettingsView(
             distanceUnit: $distanceUnit,
             liveActivityEnabled: $liveActivityEnabled,
+            liveActivityFuel: $liveActivityFuel,
+            liveActivityRadiusMiles: $liveActivityRadiusMiles,
             alertsFuel: alertsFuel,
             alertsRadiusKM: alertsRadius,
             testAlertResult: monitor.lastTestResult,

FuelBoard/LiveActivityManager.swift

@@ -48,6 +48,7 @@ enum LiveActivityManager {
         }
 
         let state = FuelBoardLiveActivityAttributes.ContentState(
+            fuel: fuel,
             stationID: best.id,
             stationName: best.name,
             brand: best.brand,
@@ -57,7 +58,7 @@ enum LiveActivityManager {
             lng: best.lng,
             updatedAt: Date()
         )
-        let attributes = FuelBoardLiveActivityAttributes(fuel: fuel)
+        let attributes = FuelBoardLiveActivityAttributes()
 
         if let current {
             // Near the 8 h cap? End and re-request so the pill keeps living.

FuelBoard/SettingsView.swift

@@ -13,9 +13,13 @@ import WidgetKit
 struct SettingsView: View {
     @Binding var distanceUnit: DistanceUnit
     /// Whether the "cheapest nearby" Live Activity is shown on the Lock Screen
-    /// / Dynamic Island. Mirrors the app list's TOP badge (selected fuel +
-    /// distance radius) and re-updates as the user drives.
+    /// / Dynamic Island. Tracks its OWN fuel + radius (below) — independent of
+    /// the Stations tab.
     @Binding var liveActivityEnabled: Bool
+    /// Fuel the Live Activity tracks (independent of the Stations tab).
+    @Binding var liveActivityFuel: FuelType
+    /// Search radius (miles, 5/10/15) the Live Activity uses.
+    @Binding var liveActivityRadiusMiles: Int
     /// The fuel + radius currently configured for alerts (mirrors the Alerts
     /// tab) so the test notification matches what real alerts will say.
     var alertsFuel: FuelType = .e10
@@ -72,10 +76,26 @@ struct SettingsView: View {
 
                 Section {
                     Toggle("Live Activity", isOn: $liveActivityEnabled)
+                    Picker("Fuel", selection: $liveActivityFuel) {
+                        ForEach(FuelType.allCases) { fuel in
+                            Text(fuel.displayName).tag(fuel)
+                        }
+                    }
+                    .onChange(of: liveActivityFuel) { _, newValue in
+                        FuelStore.saveLiveActivityFuel(newValue)
+                    }
+                    Picker("Distance", selection: $liveActivityRadiusMiles) {
+                        ForEach(FuelStore.stationRadiusOptions, id: \.self) { miles in
+                            Text("\(miles) \(distanceUnit.label)").tag(miles)
+                        }
+                    }
+                    .onChange(of: liveActivityRadiusMiles) { _, newValue in
+                        FuelStore.saveLiveActivityRadiusMiles(newValue)
+                    }
                 } header: {
                     Text("Live Activity")
                 } footer: {
-                    Text("Shows the cheapest station for your selected fuel within your chosen distance on the Lock Screen and Dynamic Island. Updates as you drive; tap to open directions. Live Activities can be disabled in System Settings → Live Activities.")
+                    Text("Shows the cheapest station for the fuel and distance you pick here on the Lock Screen and Dynamic Island — independent of the Stations tab. Updates as you drive; tap to open directions. Live Activities can be disabled in System Settings → Live Activities.")
                 }
                 .onChange(of: liveActivityEnabled) { _, newValue in
                     FuelStore.saveLiveActivityEnabled(newValue)