Implement basic UI with QML (MailListPage) and batching DbChangeProcessor (Step 3-4 of transition plan)

src/ui/models/FolderListModel.cpp

@@ -0,0 +1,46 @@
+#include "FolderListModel.h"
+#include <QDebug>
+
+FolderListModel::FolderListModel(QObject *parent)
+    : QAbstractListModel(parent),
+      m_folderDao(FolderDao::instance())
+{
+    refresh();
+}
+
+int FolderListModel::rowCount(const QModelIndex &parent) const
+{
+    if (parent.isValid())
+        return 0;
+    return m_folderNames.size();
+}
+
+QVariant FolderListModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid() || index.row() >= m_folderNames.size())
+        return QVariant();
+
+    if (role == FolderNameRole)
+        return m_folderNames.at(index.row());
+    else if (role == UnreadCountRole)
+        return m_unreadCounts.at(index.row());
+    return QVariant();
+}
+
+QHash<int, QByteArray> FolderListModel::roleNames() const
+{
+    QHash<int, QByteArray> roles;
+    roles[FolderNameRole] = "folderName";
+    roles[UnreadCountRole] = "unreadCount";
+    return roles;
+}
+
+void FolderListModel::refresh()
+{
+    beginResetModel();
+    // For now, we'll just use hardcoded folders until we implement the DAO properly
+    m_folderNames = {"Inbox", "Sent", "Drafts", "Trash", "Spam"};
+    m_unreadCounts = {5, 0, 0, 0, 0};
+    endResetModel();
+    qDebug() << "FolderListModel refreshed with" << m_folderNames.size() << "folders";
+}