Live Activity Content Density

Nucleic-Session: B3643133-163C-4C5D-BE20-1A6B7FB83DA9
Co-authored-by: Nucleic <[email protected]>

NucleicRemote/NucleicRemote/LiveActivityManager.swift

@@ -28,6 +28,14 @@ final class LiveActivityManager {
     private var pendingState: NucleicSessionAttributes.ContentState?
     private var updateTask: Task<Void, Never>?
 
+    /// Set by `RemoteStore` to ship the activity's APNS push token to the paired Macs (and to tell
+    /// them it ended). The Macs use the token to keep this glance fresh over APNs while the phone
+    /// is backgrounded and its sync socket is suspended (UX_IOS §5.3).
+    var onPushToken: ((_ token: String, _ activityID: String) -> Void)?
+    var onActivityEnded: ((_ activityID: String) -> Void)?
+    /// Streams the activity's per-activity APNS update token (it can rotate); cancelled on end.
+    private var tokenObservation: Task<Void, Never>?
+
     /// Reconcile the Activity with the current session set.
     func sync(hostName: String, sessions: [WireSessionSummary]) {
         guard ActivityAuthorizationInfo().areActivitiesEnabled else { return }