fix: onRowSelected signal signature to match currentRowChanged

- Changed from (const QModelIndex&) to (const QModelIndex&, const QModelIndex&)
- Required for QItemSelectionModel::currentRowChanged signal connection

src/ui/maillistview.cpp

@@ -572,10 +572,11 @@ void MailListView::onRowsInserted(const QModelIndex &parent, int first, int last
     }
 }
 
-void MailListView::onRowSelected(const QModelIndex &index)
+void MailListView::onRowSelected(const QModelIndex &current, const QModelIndex &previous)
 {
-    if (!index.isValid()) return;
+    Q_UNUSED(previous);
-    QModelIndex proxyIdx = m_proxyModel->mapToSource(index);
+    if (!current.isValid()) return;
+    QModelIndex proxyIdx = m_proxyModel->mapToSource(current);
     if (proxyIdx.isValid() && proxyIdx.data(EmailTreeModel::MailIdRole).isValid()) {
         int mailId = proxyIdx.data(EmailTreeModel::MailIdRole).toInt();
         emit emailSelected(mailId);

src/ui/maillistview.h

@@ -54,7 +54,7 @@ public slots:
     void setFolderType(const QString& folderType); // "inbox", "sent", "drafts", etc.
 
 private slots:
-    void onRowSelected(const QModelIndex &index);
+    void onRowSelected(const QModelIndex &current, const QModelIndex &previous);
     void onSearchTextChanged(const QString &text);
     void onFilterChanged();
     void onGroupByChanged(int index);