Both test buttons carry real station coords; map status surfaced

- Plain test notification now picks the nearest station selling the
  monitored fuel and carries its real name, price, distance and
  coordinates (was a static no-station notification)
- addAlertRequest reports whether the map snapshot attached or why it
  failed, appended to the Settings result line instead of silently
  delivering a notification without the embedded map
- Settings routes both test buttons through the live monitor

FuelBoard/ProximityMonitor.swift

@@ -195,7 +195,13 @@ final class ProximityMonitor: NSObject, ObservableObject, @preconcurrency CLLoca
     /// station's coordinates ride in `userInfo` so the tap handler can route
     /// to Apple Maps (or an in-app fallback), and a map snapshot with a pin is
     /// attached so the expanded notification shows where the station is.
-    private func addAlertRequest(content: UNMutableNotificationContent, station: FuelStation) {
+    /// `mapStatus` reports whether the snapshot attached (or why not), so the
+    /// test UI can show it instead of failing silently.
+    private func addAlertRequest(
+        content: UNMutableNotificationContent,
+        station: FuelStation,
+        mapStatus: ((String) -> Void)? = nil
+    ) {
         content.userInfo = [
             "stationName": station.name,
             "stationLat": station.lat,
@@ -212,17 +218,20 @@ final class ProximityMonitor: NSObject, ObservableObject, @preconcurrency CLLoca
         snapshotter.start { [content] snapshot, error in
             Task { @MainActor in
                 let finalContent = content
+                var status = "map: no image"
                 if let snapshot, error == nil,
                    let image = Self.mapImage(snapshot: snapshot, station: station) {
                     let url = FileManager.default.temporaryDirectory
                         .appendingPathComponent("alert-map-\(UUID().uuidString).png")
-                    if let data = image.pngData() {
-                        try? data.write(to: url)
-                        if let attachment = try? UNNotificationAttachment(identifier: "map", url: url, options: nil) {
-                            finalContent.attachments = [attachment]
-                        }
+                    if let data = image.pngData(), (try? data.write(to: url)) != nil,
+                       let attachment = try? UNNotificationAttachment(identifier: "map", url: url, options: nil) {
+                        finalContent.attachments = [attachment]
+                        status = "map: attached"
                     }
+                } else if let error {
+                    status = "map: snapshot failed (\(error.localizedDescription))"
                 }
+                mapStatus?(status)
                 let request = UNNotificationRequest(identifier: UUID().uuidString, content: finalContent, trigger: nil)
                 UNUserNotificationCenter.current().add(request)
             }
@@ -272,8 +281,11 @@ final class ProximityMonitor: NSObject, ObservableObject, @preconcurrency CLLoca
             content.title = "Cheapest \(fuel.displayName) nearby: \(brand)"
             content.body = "\(candidate.name) · \(distanceText) away · \(String(format: "%.1fp", price)). Tap for directions."
             content.sound = .default
-            addAlertRequest(content: content, station: candidate)
-            lastTestResult = "\(fuel.displayName) · \(brand) · \(String(format: "%.1fp", price)) · \(distanceText) away · radius \(unit.format(radiusKM))"
+            let baseResult = "\(fuel.displayName) · \(brand) · \(String(format: "%.1fp", price)) · \(distanceText) away · radius \(unit.format(radiusKM))"
+            addAlertRequest(content: content, station: candidate) { status in
+                self.lastTestResult = "\(baseResult) · \(status)"
+            }
+            lastTestResult = baseResult
         } else {
             // No real candidate (no stations loaded yet, or none sell the
             // monitored fuel) — still fire so delivery is testable, but say
@@ -294,17 +306,39 @@ final class ProximityMonitor: NSObject, ObservableObject, @preconcurrency CLLoca
 
     /// Fires a notification with NO criteria checks at all — no geofence, no
     /// cheapest-within-radius, no dedup, no permission gate, no fuel/radius
-    /// coupling. Purely tests "does a notification appear, and does tapping
-    /// it open the app". If notifications are denied system-wide nothing can
-    /// display, but this fires regardless of every FuelBoard condition.
-    static func sendPlainTestNotification() {
-        let content = UNMutableNotificationContent()
-        content.title = "FuelBoard test notification"
-        content.body = "This is a plain test alert — no criteria were checked. Tap to open FuelBoard."
-        content.sound = .default
+    /// coupling. Still carries a REAL station (the nearest one selling the
+    /// monitored fuel) with its real name, price, distance and coordinates, so
+    /// the tap action — directions to that station — is testable regardless of
+    /// every alert condition. If notifications are denied system-wide nothing
+    /// can display, but this fires regardless of every FuelBoard condition.
+    func sendPlainTestNotification() {
+        let unit = FuelStore.loadDistanceUnit()
+        let location = FuelStore.loadLocation()
+        let sellers = stations.filter { $0.prices[fuel] != nil }
+        let nearest = sellers.min { lhs, rhs in
+            let ld = location.map { lhs.distanceKM(to: $0.lat, lng2: $0.lng) } ?? 0
+            let rd = location.map { rhs.distanceKM(to: $0.lat, lng2: $0.lng) } ?? 0
+            return ld < rd
+        }
 
-        let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: nil)
-        UNUserNotificationCenter.current().add(request)
+        let content = UNMutableNotificationContent()
+        if let nearest, let price = nearest.prices[fuel] {
+            let brand = nearest.brand.isEmpty ? nearest.name : nearest.brand
+            let distanceText: String = {
+                guard let location else { return unit.format(0) }
+                return unit.format(nearest.distanceKM(to: location.lat, lng2: location.lng))
+            }()
+            content.title = "\(brand) — plain test notification"
+            content.body = "\(nearest.name) · \(distanceText) away · \(String(format: "%.1fp", price)). Tap for directions."
+            content.sound = .default
+            addAlertRequest(content: content, station: nearest)
+        } else {
+            content.title = "FuelBoard test notification"
+            content.body = "No station data loaded yet — open the Stations tab first."
+            content.sound = .default
+            let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: nil)
+            UNUserNotificationCenter.current().add(request)
+        }
     }
 
     // MARK: - Notification presentation + tap