fix(ios): read notification permission without sending UNNotificationSettings

apps/ios/Feature/Shared/AppPermissionCenter.swift

@@ -41,8 +41,18 @@ enum AppPermissionCenter {
 
   @MainActor
   static func notificationStatus() async -> AppPermissionStatus {
-    let settings = await UNUserNotificationCenter.current().notificationSettings()
-    return mapNotificationSettings(settings)
+    await currentNotificationStatus()
+  }
+
+  /// Maps inside the callback so only the Sendable status crosses actors. Xcode 16's SDK
+  /// doesn't mark `UNNotificationSettings` Sendable, so awaiting `notificationSettings()` from
+  /// the main actor fails the Swift 6 build there.
+  private static func currentNotificationStatus() async -> AppPermissionStatus {
+    await withCheckedContinuation { continuation in
+      UNUserNotificationCenter.current().getNotificationSettings { settings in
+        continuation.resume(returning: mapNotificationSettings(settings))
+      }
+    }
   }
 
   @MainActor
@@ -102,8 +112,7 @@ enum AppPermissionCenter {
       }
 
     case .notifications:
-      let settings = await UNUserNotificationCenter.current().notificationSettings()
-      switch mapNotificationSettings(settings) {
+      switch await currentNotificationStatus() {
       case .authorized, .limited:
         return .granted
       case .denied, .restricted:

apps/ios/Platform/Notifications/NotificationScheduler.swift

@@ -19,10 +19,7 @@ actor NotificationScheduler {
     permissionStatus: AppPermissionStatus
   ) async throws {
     let knownMealIdentifiers = NotificationRuleKind.orderedMealKinds.map(\.notificationIdentifier)
-    let pending = await center.pendingNotificationRequests()
-    let staleFreshnessIdentifiers =
-      pending
-      .map(\.identifier)
+    let staleFreshnessIdentifiers = await center.pendingNotificationIdentifiers()
       .filter { $0.hasPrefix("freshness.") }
 
     await center.removePendingNotificationRequests(

apps/ios/Platform/Notifications/UserNotificationCenterClient.swift

@@ -1,15 +1,21 @@
 import Foundation
 import UserNotifications
 
+/// Returns pending identifiers rather than `UNNotificationRequest`s: Xcode 16's SDK doesn't
+/// mark the requests Sendable, so returning them to the scheduler actor fails the Swift 6 build.
 protocol UserNotificationCenterClient: Sendable {
-  func pendingNotificationRequests() async -> [UNNotificationRequest]
+  func pendingNotificationIdentifiers() async -> [String]
   func add(_ request: UNNotificationRequest) async throws
   func removePendingNotificationRequests(withIdentifiers identifiers: [String]) async
 }
 
 struct SystemUserNotificationCenterClient: UserNotificationCenterClient {
-  func pendingNotificationRequests() async -> [UNNotificationRequest] {
-    await UNUserNotificationCenter.current().pendingNotificationRequests()
+  func pendingNotificationIdentifiers() async -> [String] {
+    await withCheckedContinuation { continuation in
+      UNUserNotificationCenter.current().getPendingNotificationRequests { requests in
+        continuation.resume(returning: requests.map(\.identifier))
+      }
+    }
   }
 
   func add(_ request: UNNotificationRequest) async throws {

apps/ios/Tests/NotificationSchedulerTests.swift

@@ -127,8 +127,8 @@ final class MockNotificationCenter: @unchecked Sendable, UserNotificationCenterC
     self.pendingRequests = pendingRequests
   }
 
-  func pendingNotificationRequests() async -> [UNNotificationRequest] {
-    pendingRequests
+  func pendingNotificationIdentifiers() async -> [String] {
+    pendingRequests.map(\.identifier)
   }
 
   func add(_ request: UNNotificationRequest) async throws {