一、火山RTC引擎集成时，设置CB
1、统一设置
void NRTCEngine::SetByteRtcCBS() {UserPublishStreamCallback callback = [this](const std::string& roomId, const std::string& uid, bytertc::MediaStreamType type) {this->OnSigUserPublishStream(roomId, uid, type);};m_roomHandler->setUserPublishStreamCallback(callback);UserJoinedCallback joinCB = [this](const bytertc::UserInfo& user_info, int elapsed) {if (pChatForm){bytertc::UserInfo copy = user_info; // 显式拷贝auto task = [this, copy, elapsed]() {pChatForm->OnUserJoined_ByterRTC(copy, elapsed);};Post2UI(task);}};m_roomHandler->setUserJoinedCallback(joinCB);UserLeaveCallback leaveCB =
