fix(full-screen): 修复全屏应用列表在安装或卸载应用时列表错乱问题,优化model删除操作

qml/AppUI/FullScreenAppList.qml

@@ -76,7 +76,13 @@ ListView {
 
                 model: DelegateModel {
                     model: appGroupModel
-                    rootIndex: modelIndex(index)
+
+                    Component.onCompleted: {
+                        // Warning: rootIndex只需要设置一次，多次设置会导致对应关系错误，
+                        // delegateModel使用persistedIndex保存rootIndex，会自动进行修正
+                        rootIndex = modelIndex(index);
+                    }
+
                     delegate: Item {
                         width: GridView.view.cellWidth
                         height: GridView.view.cellHeight

src/libappdata/app-group-model.cpp

@@ -340,13 +340,13 @@ void AppGroupModel::onRowsAboutToBeRemoved(const QModelIndex &parent, int first,
             break;
         }
 
+        if (subItems->size() > 1) {
             // 删除组里的元素
             beginRemoveRows(index(groupIndex, 0, QModelIndex()), itemIndex, itemIndex);
             subItems->removeAt(itemIndex);
             endRemoveRows();
-
+        } else {
             // 删除组
-        if (subItems->isEmpty()) {
             beginRemoveRows(QModelIndex(), groupIndex, groupIndex);
             delete m_groups.takeAt(groupIndex);
             endRemoveRows();