Fix ios stats

ios/Runner/Handlers/StatsEventHandler.swift

@@ -28,7 +28,7 @@ public class StatsEventHandler: NSObject, FlutterPlugin, FlutterStreamHandler, L
         self.events = events
         let opts = LibboxCommandClientOptions()
         opts.command = LibboxCommandStatus
-        opts.statusInterval = 300
+        opts.statusInterval = Int64(NSEC_PER_SEC)
         commandClient = LibboxCommandClient(self, options: opts)
         try? commandClient?.connect()
         return nil
@@ -51,11 +51,7 @@ public class StatsEventHandler: NSObject, FlutterPlugin, FlutterStreamHandler, L
             "uplink-total": message.uplinkTotal,
             "downlink-total": message.downlinkTotal
         ] as [String:Any]
-        guard
-            let json = try? JSONSerialization.data(withJSONObject: data),
-            let json = String(data: json, encoding: .utf8)
-        else { return }
-        events?(json)
+        events?(data)
     }
 }
 

lib/singbox/service/platform_singbox_service.dart

@@ -194,7 +194,9 @@ class PlatformSingboxService with InfraLogger implements SingboxService {
         if (event case Map<String, dynamic> _) {
           return SingboxStats.fromJson(event);
         }
-        loggy.error("[stats client] unexpected type, msg: $event");
+        loggy.error(
+          "[stats client] unexpected type(${event.runtimeType}), msg: $event",
+        );
         throw "invalid type";
       },
     );