diff --git a/tools/chatgui/src/mainwindow.cpp b/tools/chatgui/src/mainwindow.cpp
index 6c607479..b957f72c 100644
--- a/tools/chatgui/src/mainwindow.cpp
+++ b/tools/chatgui/src/mainwindow.cpp
@@ -30,7 +30,6 @@ extern "C" {
 #include <QStyle>
 #include <QMessageBox>
 #include <QDebug>
-#include <QSettings>
 #include <QFile>
 #include <QTextStream>
 #include <QDir>
@@ -48,6 +47,19 @@ void chat_core_save_ui_state_trampoline(void* arg);
 
 static MainWindow* s_mainWindow = nullptr;
 
+/* Сохранение last_channel_id в БД (ui_state), как все остальные UI-настройки.
+   Пишется из utun-потока через trampoline, чтобы не трогать sqlite из GUI-потока. */
+static void saveLastChannelId(const QString& channelId) {
+    const char key[] = "last_channel_id";
+    QByteArray val = channelId.toUtf8();
+    size_t klen = sizeof(key) - 1, vlen = (size_t)val.size(), total = klen + 1 + vlen + 1;
+    if (total > 256) return;
+    void* arg = u_malloc(total);
+    memcpy(arg, key, klen + 1);
+    memcpy((char*)arg + klen + 1, val.constData(), vlen + 1);
+    gui_bridge_post_uasync_fn(chat_core_save_ui_state_trampoline, arg);
+}
+
 static void onMsgReceivedCallback(const char* ch_id, int ch_id_len, uint64_t author) {
     if (s_mainWindow)
         s_mainWindow->onMessageReceived(ch_id, ch_id_len, author);
@@ -293,12 +305,21 @@ void MainWindow::setupBridgeCallbacks() {
         if (!s_mainWindow || !s_mainWindow->m_db) return;
         s_mainWindow->m_db->setDb(chat_core_get_db());
         s_mainWindow->m_channelList->loadChannels();
-        QString lastCid = QSettings().value("last_channel_id").toString();
+        QString lastCid = s_mainWindow->m_db->getUiState("last_channel_id");
         if (!lastCid.isEmpty()) {
-            s_mainWindow->m_channelList->selectChannel(lastCid);
-            s_mainWindow->m_accountList->setChannel(lastCid);
-            s_mainWindow->m_currentChannelId = lastCid;
-            s_mainWindow->m_messageList->loadChannel(lastCid);
+            /* восстанавливаем канал только если он реально существует в БД —
+               иначе не дёргаем подключение к несуществующей группе */
+            bool exists = false;
+            const auto chs = s_mainWindow->m_db->getChannels();
+            for (const auto& ch : chs) { if (ch.channelId == lastCid) { exists = true; break; } }
+            if (exists) {
+                s_mainWindow->m_channelList->selectChannel(lastCid);
+                s_mainWindow->m_accountList->setChannel(lastCid);
+                s_mainWindow->m_currentChannelId = lastCid;
+                s_mainWindow->m_messageList->loadChannel(lastCid);
+            } else {
+                saveLastChannelId(QString());
+            }
         }
     });
     gui_bridge_set_attachment_downloaded_cb([](const char* ch_id, int ch_id_len, int64_t msg_id) {
@@ -318,7 +339,7 @@ void MainWindow::setupBridgeCallbacks() {
 void MainWindow::setupConnects() {
     connect(m_channelList, &ChannelList::channelSelected,
             this, [this](const QString& channelId) {
-                QSettings().setValue("last_channel_id", channelId);
+                saveLastChannelId(channelId);
                 m_currentChannelId = channelId;
                 m_messageList->loadChannel(channelId);
                 m_accountList->setChannel(channelId);
@@ -518,7 +539,7 @@ void MainWindow::reloadChannels() {
             m_channelList->selectChannel(m_pendingChannelSelect);
             m_accountList->setChannel(m_pendingChannelSelect);
             m_messageList->loadChannel(m_pendingChannelSelect);
-            QSettings().setValue("last_channel_id", m_pendingChannelSelect);
+            saveLastChannelId(m_pendingChannelSelect);
             m_currentChannelId = m_pendingChannelSelect;
             m_pendingChannelSelect.clear();
         }