Cheapest reference uses chosen miles radius (same pool as list) in app + widget; header shows 'within N miles'

FuelBoard/ContentView.swift

@@ -21,15 +21,15 @@ struct ContentView: View {
     @State private var locationManager = LocationManager()
     @StateObject private var monitor = ProximityMonitor()
 
-    /// Stations within the alert trigger radius of the current location — used
-    /// ONLY as the "cheapest" reference (RAG, TOP, deltas), so the cheapest
-    /// label matches what alerts would flag. The list itself shows the full
-    /// fetch so the count picker works. Falls back to the full fetch when
-    /// location is unknown or the radius pool is empty.
+    /// Stations within the CHOSEN search radius (miles) of the current location
+    /// — the same pool the list shows, so "cheapest" (RAG, TOP, deltas) matches
+    /// exactly what's on screen. Falls back to the full fetch when location is
+    /// unknown or the radius pool is empty.
     private var radiusScopedStations: [FuelStation] {
         guard let location else { return stations }
+        let radiusKM = Double(stationLimit) * 1.60934  // chosen miles → km
         let within = stations.filter {
-            $0.distanceKM(to: location.lat, lng2: location.lng) <= alertsRadius
+            $0.distanceKM(to: location.lat, lng2: location.lng) <= radiusKM
         }
         return within.isEmpty ? stations : within
     }
@@ -102,7 +102,6 @@ struct ContentView: View {
                 stationLimit: $stationLimit,
                 cheapestPrice: cheapestPrice,
                 location: location,
-                radiusKM: alertsRadius,
                 favouriteIDs: favouriteIDs,
                 onToggleFavourite: toggleFavourite,
                 onRefresh: { await refresh(force: true) }