Launch Activity Logic

Nucleic-Session: EBB24271-3AB2-4CBD-A47A-59FC73500371
Co-authored-by: Nucleic <[email protected]>

NucleicRemote/NucleicRemote/PushRegistrar.swift

@@ -46,15 +46,28 @@ final class PushAppDelegate: NSObject, UIApplicationDelegate {
         // Best-effort: no token → the phone still works on LAN, just no remote wake.
     }
 
-    /// Silent pushes. The relay sends a content-free `clear` (content-available) to recall the
-    /// "waiting for your approval" tickle once the approval is resolved on another device — we
-    /// wake in the background just long enough to withdraw the stale notification. Other silent
-    /// pushes (e.g. the wake tickle itself, which is an alert) don't route here.
+    /// Silent pushes (content-available). Two kinds route here:
+    /// - `clear`: recall the "waiting for your approval" tickle once the approval is resolved on
+    ///   another device — wake briefly to withdraw the stale notification.
+    /// - `adopt`: a Mac push-started a Live Activity while the app was closed; come online long
+    ///   enough to harvest and register that activity's update token so live updates + a clean end
+    ///   resume without the user opening the app (UX_IOS §5.3). This one holds the completion handler
+    ///   until the token is registered (or the background window closes), so the process isn't
+    ///   suspended mid-connect.
+    /// Other pushes (e.g. the approval wake tickle, which is an alert) don't route here.
     func application(
         _ application: UIApplication,
         didReceiveRemoteNotification userInfo: [AnyHashable: Any],
         fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void
     ) {
+        if userInfo["adopt"] != nil {
+            // The store manages its own background-task assertion for this; report .newData once it
+            // has brought the connection up and registered the token (or given up).
+            Task { @MainActor in
+                RemoteStore.shared.handleLiveActivityAdoptWake { completionHandler(.newData) }
+            }
+            return
+        }
         if userInfo["clear"] != nil {
             // Fire-and-forget on the main actor (NotificationRouter is @MainActor); the removal is a
             // quick UNUserNotificationCenter call, so we can report .noData right away.