auto-connect + GUI per-channel indicators

- chat_core_connect_auto: direct ETCP connect from SQLite (no BGP)
- auto_connect: parallel connect to peers with 3s timeout, retry 10s
- RTT saved to node_addresses on disconnect
- vertical status bar + circle badge with online count per channel
- ChannelListView prevents deselection

tools/chatgui/src/mainwindow.cpp

@@ -46,6 +46,17 @@ static void onMembersChangedCallback(const char* ch_id, int ch_id_len) {
         s_mainWindow->onMembersChanged(ch_id);
 }
 
+static void onAutoConnectStatusCallback(uint8_t status, uint16_t total_tried,
+                                         uint16_t node_count, uint16_t connected) {
+    if (s_mainWindow)
+        s_mainWindow->onAutoConnectStatus(status, total_tried, node_count, connected);
+}
+
+static void onChannelPeersOnlineCallback(const char* ch_id, int ch_id_len, uint16_t online) {
+    if (s_mainWindow)
+        s_mainWindow->onChannelPeersOnline(ch_id, ch_id_len, online);
+}
+
 MainWindow::MainWindow(QWidget *parent, DbManager* db, const QString& cfgPath,
                        const QString& dbPath, const QString& debugFile,
                        const QString& debugLevel, const QString& debugCategories)
@@ -76,6 +87,8 @@ MainWindow::MainWindow(QWidget *parent, DbManager* db, const QString& cfgPath,
             qDebug("MainWindow: MY_NODE_ID setMyNodeId(%016llx)", (unsigned long long)nid);
             if (s_mainWindow && s_mainWindow->m_db) s_mainWindow->m_db->setMyNodeId((quint64)nid);
         });
+        gui_bridge_set_auto_connect_status_cb(onAutoConnectStatusCallback);
+        gui_bridge_set_channel_peers_online_cb(onChannelPeersOnlineCallback);
 
         setupNode();
         setupMessaging();
@@ -258,6 +271,20 @@ void MainWindow::onMembersChanged(const char* ch_id) {
         m_accountList->refresh();
 }
 
+void MainWindow::onAutoConnectStatus(uint8_t status, uint16_t /*total_tried*/,
+                                      uint16_t /*node_count*/, uint16_t /*connected*/) {
+    if (m_channelList) {
+        m_channelList->setAutoConnectActive(status == 0);
+    }
+}
+
+void MainWindow::onChannelPeersOnline(const char* ch_id, int ch_id_len, uint16_t online) {
+    if (m_channelList) {
+        QString cid = QString::fromUtf8(ch_id, ch_id_len);
+        m_channelList->setChannelPeersOnline(cid, (int)online);
+    }
+}
+
 void MainWindow::reloadChannels() {
     if (m_channelList) {
         m_channelList->loadChannels();