Click onion address in status bar to copy to clipboard

Shows "Copied!" tooltip on click. Changed cursor to pointing hand.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/qt/forms/mainwindow.ui

@@ -1422,16 +1422,16 @@ QLabel {
             </font>
            </property>
            <property name="cursor">
-            <cursorShape>IBeamCursor</cursorShape>
+            <cursorShape>PointingHandCursor</cursorShape>
            </property>
            <property name="toolTip">
-            <string>This wallet's Tor .onion address</string>
+            <string>Click to copy .onion address</string>
            </property>
            <property name="text">
             <string notr="true"/>
            </property>
            <property name="textInteractionFlags">
-            <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+            <set>Qt::NoTextInteraction</set>
            </property>
           </widget>
          </item>

src/qt/trianglesgui.cpp

@@ -68,6 +68,8 @@
 #include <QFileDialog>
 #include <QStandardPaths>
 #include <QTimer>
+#include <QClipboard>
+#include <QToolTip>
 #include <QDragEnterEvent>
 #if QT_VERSION < 0x050000
 #include <QUrl>
@@ -338,9 +340,11 @@ TrianglesGUI::TrianglesGUI(bool fIsTestnet, QWidget *parent):
         updateStakingIcon();
     }
 
-    // Onion address in status bar (hidden until populated)
+    // Onion address in status bar (hidden until populated, click to copy)
     labelOnionAddress = ui->label_onion;
     labelOnionAddress->setVisible(false);
+    labelOnionAddress->setCursor(Qt::PointingHandCursor);
+    labelOnionAddress->installEventFilter(this);
 
     // V3 indicator next to staking icon (hidden until onion is active)
     labelV3Icon = ui->label_v3;
@@ -1307,6 +1311,16 @@ bool TrianglesGUI::eventFilter(QObject *object, QEvent *event)
     }
     if (object == ui->pushButton_Overview && event->type() == QEvent::MouseButtonPress)
         gotoOverviewPage();
+    if (object == labelOnionAddress && event->type() == QEvent::MouseButtonPress)
+    {
+        QString addr = labelOnionAddress->text();
+        if (!addr.isEmpty())
+        {
+            QApplication::clipboard()->setText(addr);
+            QToolTip::showText(QCursor::pos(), tr("Copied!"), labelOnionAddress);
+        }
+        return true;
+    }
     return QMainWindow::eventFilter(object, event);
 }