fix: замена malloc на u_strdup в channelSelected — u_free падал на чужой памяти

tools/chatgui/src/mainwindow.cpp

@@ -181,9 +181,8 @@ MainWindow::MainWindow(QWidget *parent, DbManager* db, const QString& cfgPath,
                     m_accountList->setChannel(channelId);
 
                     QByteArray cidBA = channelId.toUtf8();
-                    char* cid = (char*)malloc(cidBA.size() + 1);
-                    if (cid) { memcpy(cid, cidBA.constData(), cidBA.size()); cid[cidBA.size()] = '\0';
-                        gui_bridge_post_uasync_fn(chat_core_connect_channel_trampoline, cid); }
+                    char* cid = u_strdup(cidBA.constData());
+                    if (cid) gui_bridge_post_uasync_fn(chat_core_connect_channel_trampoline, cid);
                 });
 
         connect(m_channelList, &ChannelList::inviteRequested,