fix(core): harden settlement and wallet integration

app/Events/BalanceUpdateBroadcast.php

@@ -2,8 +2,8 @@
 
 namespace App\Events;
 
-use Illuminate\Broadcasting\Channel;
 use Illuminate\Queue\SerializesModels;
+use Illuminate\Broadcasting\PrivateChannel;
 use Illuminate\Foundation\Events\Dispatchable;
 use Illuminate\Broadcasting\InteractsWithSockets;
 use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
@@ -53,11 +53,11 @@ final class BalanceUpdateBroadcast implements ShouldBroadcast
     /**
      * 使用私有频道，只有指定玩家能收到自己的余额变动。
      *
-     * @return array<int, Channel>
+     * @return array<int, PrivateChannel>
      */
     public function broadcastOn(): array
     {
-        return [new Channel('player.'.$this->playerId)];
+        return [new PrivateChannel('player.'.$this->playerId)];
     }
 
     public function broadcastAs(): string