fix: Disable built-in ping/pong in OkHttpClient to implement custom heartbeat

app/src/main/java/com/rosetta/messenger/network/Protocol.kt

@@ -42,7 +42,8 @@ class Protocol(
     private val client = OkHttpClient.Builder()
         .readTimeout(0, TimeUnit.MILLISECONDS)
         .connectTimeout(10, TimeUnit.SECONDS)
-        .pingInterval(30, TimeUnit.SECONDS)  // Автоматический ping/pong для keep-alive
+        // Отключаем встроенный ping/pong - используем свой heartbeat
+        // .pingInterval(30, TimeUnit.SECONDS)
         .build()
     
     private var webSocket: WebSocket? = null