fix pip screen bugs

iosApp/iosApp/AppDelegate.swift

@@ -1,3 +1,4 @@
+import AVFoundation
 import UIKit
 import WidgetKit
 
@@ -93,9 +94,39 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
             guard let message = notification.userInfo?["message"] as? String else { return }
             HostBridge.shared.showToast(message)
         }
+        NotificationCenter.default.addObserver(
+            forName: Notification.Name("llmpPrepareAudioSession"),
+            object: nil,
+            queue: .main
+        ) { [weak self] _ in
+            self?.activatePlaybackSession()
+        }
         QqShareHost.shared.prepare()
     }
 
+    /// iOS 27 起主线程同步 setActive 会报 Hang Risk，改走异步激活。
+    private func activatePlaybackSession() {
+        let session = AVAudioSession.sharedInstance()
+        try? session.setCategory(.playback)
+        if #available(iOS 27.0, *) {
+            session.activate(options: []) { activated, error in
+                DispatchQueue.main.async {
+                    NotificationCenter.default.post(
+                        name: Notification.Name("llmpAudioSessionReady"),
+                        object: nil,
+                        userInfo: ["ok": activated && error == nil]
+                    )
+                }
+            }
+        } else {
+            try? session.setActive(true)
+            NotificationCenter.default.post(
+                name: Notification.Name("llmpAudioSessionReady"),
+                object: nil
+            )
+        }
+    }
+
     func application(
         _ app: UIApplication,
         open url: URL,