Refine trends and debug harness; clean up warnings

FuelBoard/OnboardingView.swift

@@ -329,7 +329,7 @@ struct OnboardingView: View {
 /// Owns the system permission requests during onboarding and publishes
 /// their outcomes so the pages can reflect them live.
 @MainActor
-final class OnboardingPermissionPrompter: NSObject, ObservableObject, @preconcurrency CLLocationManagerDelegate {
+final class OnboardingPermissionPrompter: NSObject, ObservableObject, CLLocationManagerDelegate {
     @Published private(set) var locationGranted = false
     @Published private(set) var locationDenied = false
     @Published private(set) var notificationsGranted = false
@@ -358,11 +358,14 @@ final class OnboardingPermissionPrompter: NSObject, ObservableObject, @preconcur
             Task { @MainActor in
                 switch settings.authorizationStatus {
                 case .notDetermined:
-                    UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { granted, _ in
-                        Task { @MainActor in
-                            self.notificationsGranted = granted
-                            self.notificationsDenied = !granted
-                        }
+                    do {
+                        let granted = try await UNUserNotificationCenter.current()
+                            .requestAuthorization(options: [.alert, .sound, .badge])
+                        self.notificationsGranted = granted
+                        self.notificationsDenied = !granted
+                    } catch {
+                        self.notificationsGranted = false
+                        self.notificationsDenied = true
                     }
                 case .authorized:
                     self.notificationsGranted = true