fix, flutter, peer info event may be changed accidentally

Signed-off-by: fufesou <shuanglongchen@yeah.net>

flutter/lib/models/model.dart

@@ -628,7 +628,9 @@ class FfiModel with ChangeNotifier {
 
   /// Handle the peer info event based on [evt].
   handlePeerInfo(Map<String, dynamic> evt, String peerId, bool isCache) async {
-    cachedPeerData.peerInfo = evt;
+    // Map clone is required here, otherwise "evt" may be changed by other threads through the reference.
+    // Because this function is asynchronous, there's an "await" in this function.
+    cachedPeerData.peerInfo = {...evt};
 
     // recent peer updated by handle_peer_info(ui_session_interface.rs) --> handle_peer_info(client.rs) --> save_config(client.rs)
     bind.mainLoadRecentPeers();