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";
+}

src/ui/models/FolderListModel.h

@@ -0,0 +1,34 @@
+#ifndef FOLDERLISTMODEL_H
+#define FOLDERLISTMODEL_H
+
+#include <QAbstractListModel>
+#include <QHash>
+#include <QByteArray>
+#include "../db/dao/folderdao.h"
+
+class FolderListModel : public QAbstractListModel
+{
+    Q_OBJECT
+public:
+    explicit FolderListModel(QObject *parent = nullptr);
+    ~FolderListModel() override = default;
+
+    enum FolderRoles {
+        FolderNameRole = Qt::UserRole + 1,
+        UnreadCountRole
+    };
+
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    QHash<int, QByteArray> roleNames() const override;
+
+    // Optional: method to refresh the model from the database
+    void refresh();
+
+private:
+    QVector<QString> m_folderNames;
+    QVector<int> m_unreadCounts;
+    FolderDao& m_folderDao;
+};
+
+#endif // FOLDERLISTMODEL_H