Test alert uses real data: actual cheapest station within radius

The first Settings test button no longer sends a hardcoded placeholder —
it runs the same criteria as a live alert (monitored fuel, alert radius,
current location) against the loaded stations and sends the REAL station
name, brand and price. Result line shown under the button; graceful
message when no stations or no sellers within radius.

FuelBoard/SettingsView.swift

@@ -3,14 +3,21 @@ import StoreKit
 import UserNotifications
 import WidgetKit
 
-/// Settings tab — distance units, onboarding replay, a tip jar, and a
-/// test-alert button that previews what a real price notification looks like.
+/// Settings tab — distance units, onboarding replay, a tip jar, and
+/// test-alert buttons. The first test button uses REAL data (the actual
+/// cheapest station for the monitored fuel within the radius, exactly like a
+/// live alert) via `onTestAlert`; the second fires with no criteria at all.
 struct SettingsView: View {
     @Binding var distanceUnit: DistanceUnit
     /// 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
     var alertsRadiusKM: Double = 3.0
+    /// Result line from the last real-data test alert (what it picked).
+    var testAlertResult: String?
+    /// Drives the real-data test — ContentView routes this to the live
+    /// ProximityMonitor so the test uses its actual stations/fuel/radius.
+    var onTestAlert: () -> Void = {}
     var onShowOnboarding: () -> Void = {}
 
     @StateObject private var tipStore = TipStore()
@@ -52,13 +59,18 @@ struct SettingsView: View {
                     Button {
                         sendTestAlert()
                     } label: {
-                        Label("Test alert notification", systemImage: "bell.badge.fill")
+                        Label("Test alert notification (real data)", systemImage: "bell.badge.fill")
                     }
                     if let testAlertMessage {
                         Text(testAlertMessage)
                             .font(.footnote)
                             .foregroundStyle(.secondary)
                     }
+                    if let testAlertResult {
+                        Label(testAlertResult, systemImage: "checkmark.circle.fill")
+                            .font(.footnote)
+                            .foregroundStyle(.green)
+                    }
                     Button {
                         ProximityMonitor.sendPlainTestNotification()
                     } label: {
@@ -67,7 +79,7 @@ struct SettingsView: View {
                 } header: {
                     Text("Alerts")
                 } footer: {
-                    Text("The first button sends a notification shaped like a real price alert for \(alertsFuel.displayName.lowercased()) within \(distanceUnit.format(alertsRadiusKM)). The second fires with no criteria at all — no geofence, no cheapest check — just to verify a notification appears and tapping it opens FuelBoard.")
+                    Text("The first button applies the real criteria — cheapest \(alertsFuel.displayName.lowercased()) station within \(distanceUnit.format(alertsRadiusKM)) of you — and sends the actual station's name and price. The second fires with no criteria at all, just to verify a notification appears and tapping it opens FuelBoard.")
                 }
 
                 Section {
@@ -110,8 +122,7 @@ struct SettingsView: View {
             Task { @MainActor in
                 switch settings.authorizationStatus {
                 case .authorized, .provisional, .ephemeral:
-                    ProximityMonitor.sendTestNotification(fuel: alertsFuel, radiusKM: alertsRadiusKM)
-                    testAlertMessage = "Test alert sent — check your notification centre."
+                    onTestAlert()
                 case .denied:
                     testAlertMessage = "Notifications are turned off for FuelBoard. Enable them in Settings → Notifications → FuelBoard, then try again."
                 default:
@@ -119,8 +130,7 @@ struct SettingsView: View {
                     UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { granted, _ in
                         Task { @MainActor in
                             if granted {
-                                ProximityMonitor.sendTestNotification(fuel: alertsFuel, radiusKM: alertsRadiusKM)
-                                testAlertMessage = "Test alert sent — check your notification centre."
+                                onTestAlert()
                             } else {
                                 testAlertMessage = "Notifications weren't allowed, so no test alert was sent."
                             }