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/channeldelegate.cpp

@@ -9,15 +9,30 @@ void ChannelDelegate::paint(QPainter *painter, const QStyleOptionViewItem &optio
                             const QModelIndex &index) const {
     painter->save();
 
+    const int barWidth = 4;
+    const int margin = 8;
+    const int iconSize = 32;
+
+    int peersOnline = index.data(ChannelPeersOnlineRole).toInt();
+    int autoActive  = index.data(ChannelAutoConnectActiveRole).toInt();
+
+    /* ── background ── */
     if (option.state & QStyle::State_Selected) {
         painter->fillRect(option.rect, option.palette.highlight());
     } else if (option.state & QStyle::State_MouseOver) {
         painter->fillRect(option.rect, option.palette.light());
     }
 
-    const int margin = 8;
-    const int iconSize = 32;
-    QRect iconRect(option.rect.left() + margin,
+    /* ── vertical status bar (left edge, over background) ── */
+    QColor barColor = Qt::transparent;
+    if (peersOnline > 0)                      barColor = QColor("#4CAF50");
+    else if (autoActive && peersOnline == 0)  barColor = QColor("#FFC107");
+    if (barColor.alpha() > 0) {
+        QRect barRect(option.rect.left(), option.rect.top(), barWidth, option.rect.height());
+        painter->fillRect(barRect, barColor);
+    }
+
+    QRect iconRect(option.rect.left() + margin + barWidth,
                    option.rect.top() + (option.rect.height() - iconSize) / 2,
                    iconSize, iconSize);
 
@@ -26,6 +41,24 @@ void ChannelDelegate::paint(QPainter *painter, const QStyleOptionViewItem &optio
         icon.paint(painter, iconRect);
     }
 
+    /* ── online count badge (top-left of avatar, above it) ── */
+    if (peersOnline > 0) {
+        int badgeSize = 16;
+        QRect badgeRect(iconRect.left() - 4, iconRect.top() - 6, badgeSize, badgeSize);
+        painter->setRenderHint(QPainter::Antialiasing);
+        painter->setBrush(QColor("#4CAF50"));
+        painter->setPen(QPen(Qt::white, 1.5));
+        painter->drawEllipse(badgeRect);
+        QFont badgeFont = option.font;
+        badgeFont.setBold(true);
+        badgeFont.setPixelSize(10);
+        painter->setFont(badgeFont);
+        painter->setPen(Qt::white);
+        QString num = QString::number(peersOnline);
+        if (peersOnline > 9) num = "9+";
+        painter->drawText(badgeRect, Qt::AlignCenter, num);
+    }
+
     QRect textRect(iconRect.right() + margin, option.rect.top() + margin,
                    option.rect.right() - iconRect.right() - 2 * margin,
                    option.rect.height() - 2 * margin);