feat: add GOV.UK report issue action

FuelBoard/StationDetailView.swift

@@ -11,6 +11,9 @@ struct StationDetailView: View {
     let location: Coordinate?
     let distanceUnit: DistanceUnit
     @Environment(\.dismiss) private var dismiss
+    @State private var showingReportIssueConfirmation = false
+
+    private let reportIssueURL = URL(string: "https://www.gov.uk/guidance/report-an-error-in-fuel-prices-or-forecourt-details")!
 
     private var stationCoordinate: CLLocationCoordinate2D {
         CLLocationCoordinate2D(latitude: station.lat, longitude: station.lng)
@@ -51,10 +54,23 @@ struct StationDetailView: View {
                     } label: {
                         Label("Directions", systemImage: "arrow.triangle.turn.up.right.diamond.fill")
                     }
+                    Button(role: .destructive) {
+                        showingReportIssueConfirmation = true
+                    } label: {
+                        Label("Report issue", systemImage: "exclamationmark.bubble.fill")
+                    }
                 }
             }
             .navigationTitle(station.name)
             .navigationBarTitleDisplayMode(.inline)
+            .alert("Report an error?", isPresented: $showingReportIssueConfirmation) {
+                Button("Cancel", role: .cancel) { }
+                Button("Open GOV.UK") {
+                    UIApplication.shared.open(reportIssueURL)
+                }
+            } message: {
+                Text("Are you sure you want to report an error in fuel prices or forecourt details? This will open in your chosen browser.")
+            }
             .toolbar {
                 ToolbarItem(placement: .cancellationAction) {
                     Button("Done") { dismiss() }