fix: adjust folder grid item height consistency

1. Added id 'folderGrid' to GridLayout for better reference
2. Added Layout.maximumHeight constraint to ensure consistent icon
heights
3. Calculated maximum height based on parent height and row spacing
4. Maintains visual consistency in folder grid layouts

fix: 调整文件夹网格项高度一致性

1. 为 GridLayout 添加 id 'folderGrid' 以便更好引用
2. 添加 Layout.maximumHeight 约束确保图标高度一致
3. 基于父高度和行间距计算最大高度
4. 保持文件夹网格布局的视觉一致性

Pms: BUG-320943

Author: wjyrich

qml/IconItemDelegate.qml

@@ -123,6 +123,7 @@ Control {
                         radius: 12
 
                         GridLayout {
+                            id: folderGrid
                             anchors.fill: parent
                             rows: 2
                             columns: 2
@@ -138,6 +139,9 @@ Control {
                                     Layout.fillWidth: true
                                     Layout.alignment: Qt.AlignTop | Qt.AlignLeft
 
+                                    // 添加最大高度限制，确保图标高度一致
+                                    Layout.maximumHeight: Math.max(0, parent.height / 2 - folderGrid.rowSpacing / 2)
+
                                     name: modelData
                                     sourceSize: Qt.size(root.maxIconSizeInFolder, root.maxIconSizeInFolder)
                                     scale: parent.width / 2 / root.maxIconSizeInFolder