Results filter is now search radius in miles (5/10/15); relay fetch scoped to radius, limit 500; changing miles re-fetches; caption shows stations within N miles

FuelBoard/ContentView.swift

@@ -39,7 +39,9 @@ struct ContentView: View {
     }
 
     private var displayedStations: [FuelStation] {
-        Array(sortedStations.prefix(stationLimit))
+        // Relay already returns every station within the selected miles radius
+        // (sorted nearest-first); no local cap needed.
+        sortedStations
     }
 
     private var sortedStations: [FuelStation] {
@@ -145,6 +147,10 @@ struct ContentView: View {
             // No re-fetch needed — one response carries E5/E10/DIESEL prices.
             WidgetCenter.shared.reloadAllTimelines()
         }
+        .onChange(of: stationLimit) { _, _ in
+            // Search radius changed (miles) — cached stations may not cover it.
+            Task { await refresh(force: true) }
+        }
         .onChange(of: alertsEnabled) { _, newValue in
             FuelStore.saveAlertsEnabled(newValue)
             monitor.setEnabled(newValue)
@@ -182,7 +188,11 @@ struct ContentView: View {
         isLoading = true
         defer { isLoading = false }
         do {
-            let fetched = try await FuelPriceProvider.active.fetchStations(near: location?.lat, lng: location?.lng, fuel: selectedFuel)
+            let fetched = try await FuelPriceProvider.active.fetchStations(
+                near: location?.lat, lng: location?.lng,
+                fuel: selectedFuel,
+                radiusKM: Double(stationLimit) * 1.60934  // miles → km
+            )
             stations = fetched
             FuelStore.saveStations(fetched)
             FuelStore.saveLastRefresh()

FuelBoard/StationsView.swift

@@ -80,9 +80,9 @@ struct StationsView: View {
 
                     if !stations.isEmpty {
                         Divider()
-                        Picker("Show", selection: $stationLimit) {
-                            ForEach([10, 25, 50, 75, 100], id: \.self) { count in
-                                Text("\(count)").tag(count)
+                        Picker("Within", selection: $stationLimit) {
+                            ForEach(FuelStore.stationRadiusOptions, id: \.self) { miles in
+                                Text("\(miles) miles").tag(miles)
                             }
                         }
                         .pickerStyle(.segmented)
@@ -90,7 +90,7 @@ struct StationsView: View {
                             FuelStore.saveStationLimit(newValue)
                         }
                         .padding(.vertical, 2)
-                        Text("Showing \(stations.count) of \(totalCount) stations")
+                        Text("\(totalCount) stations within \(stationLimit) miles")
                             .font(.caption2)
                             .foregroundStyle(.secondary)
                     }

Shared/FuelPriceProvider.swift

@@ -13,8 +13,9 @@ import Foundation
 
 protocol FuelPriceProviding {
     /// Fetch stations with prices. `location` may be nil (sort by price only).
-    /// Throws on failure so callers can fall back to cached/sample data.
-    func fetchStations(near lat: Double?, lng: Double?, fuel: FuelType) async throws -> [FuelStation]
+    /// `radiusKM` bounds the search area (used by the relay). Throws on failure
+    /// so callers can fall back to cached/sample data.
+    func fetchStations(near lat: Double?, lng: Double?, fuel: FuelType, radiusKM: Double) async throws -> [FuelStation]
 }
 
 enum FuelPriceProvider {
@@ -31,15 +32,15 @@ enum FuelPriceProvider {
 struct RelayFuelProvider: FuelPriceProviding {
     var baseURL = URL(string: "http://192.168.1.131:8788")!
 
-    func fetchStations(near lat: Double?, lng: Double?, fuel: FuelType) async throws -> [FuelStation] {
+    func fetchStations(near lat: Double?, lng: Double?, fuel: FuelType, radiusKM: Double) async throws -> [FuelStation] {
         var components = URLComponents(url: baseURL.appendingPathComponent("api/v1/stations"), resolvingAgainstBaseURL: false)!
         var query: [URLQueryItem] = [URLQueryItem(name: "fuel", value: fuel.rawValue)]
         if let lat, let lng {
             query.append(URLQueryItem(name: "lat", value: String(lat)))
             query.append(URLQueryItem(name: "lng", value: String(lng)))
-            query.append(URLQueryItem(name: "radius", value: "50"))
+            query.append(URLQueryItem(name: "radius", value: String(radiusKM)))
         }
-        query.append(URLQueryItem(name: "limit", value: "100"))
+        query.append(URLQueryItem(name: "limit", value: "500"))
         components.queryItems = query
 
         let (data, response) = try await URLSession.shared.data(from: components.url!)
@@ -106,7 +107,7 @@ private struct RelayResponse: Codable {
 /// Real England-wide data comes from the relay (full-UK Fuel Finder CSV/API).
 /// Prices in pence/litre.
 struct SampleFuelProvider: FuelPriceProviding {
-    func fetchStations(near lat: Double?, lng: Double?, fuel: FuelType) async throws -> [FuelStation] {
+    func fetchStations(near lat: Double?, lng: Double?, fuel: FuelType, radiusKM: Double) async throws -> [FuelStation] {
         try await Task.sleep(nanoseconds: 300_000_000) // simulate fetch
         return Self.sampleStations
     }
@@ -200,7 +201,7 @@ struct FuelFinderProvider: FuelPriceProviding {
     let clientID: String
     let clientSecret: String
 
-    func fetchStations(near lat: Double?, lng: Double?, fuel: FuelType) async throws -> [FuelStation] {
+    func fetchStations(near lat: Double?, lng: Double?, fuel: FuelType, radiusKM: Double) async throws -> [FuelStation] {
         // TODO: OAuth token → GET /v1/prices → map to FuelStation.
         // The live API requires authentication; see notes above.
         throw FuelProviderError.notImplemented

Shared/FuelStore.swift

@@ -140,7 +140,7 @@ struct FuelStore {
     static let locationKey = "fuelboard.lastLocation"  // "lat,lng,timestamp"
     static let fuelKey = "fuelboard.selectedFuel"      // FuelType raw value
     static let sortModeKey = "fuelboard.sortMode"      // SortMode raw value
-    static let stationLimitKey = "fuelboard.stationLimit" // Int (10/25/50/75/100)
+    static let stationLimitKey = "fuelboard.stationLimitMiles" // Int miles (5/10/15)
     static let favouritesKey = "fuelboard.favourites"      // [FuelStation] JSON
     static let alertsEnabledKey = "fuelboard.alertsEnabled" // Bool
     static let alertsRadiusKey = "fuelboard.alertsRadius"   // Double km
@@ -209,17 +209,21 @@ struct FuelStore {
         saveString(mode.rawValue, service: sortModeKey)
     }
 
-    // MARK: Station count limit
+    // MARK: Station search radius (miles)
+
+    /// Search radius options — the results filter shows stations within this
+    /// many miles of the current location.
+    static let stationRadiusOptions = [5, 10, 15]
 
     static func loadStationLimit() -> Int {
-        if let raw = loadString(service: stationLimitKey), let value = Int(raw), [10, 25, 50, 75, 100].contains(value) {
+        if let raw = loadString(service: stationLimitKey), let value = Int(raw), stationRadiusOptions.contains(value) {
             return value
         }
-        return 25
+        return 5
     }
 
-    static func saveStationLimit(_ limit: Int) {
-        saveString(String(limit), service: stationLimitKey)
+    static func saveStationLimit(_ miles: Int) {
+        saveString(String(miles), service: stationLimitKey)
     }
 
     // MARK: Favourites