fix: prevent focus issues during mouse wheel page navigation

1. Added wheelFocusSink Item to capture focus during mouse wheel
scrolling
2. Introduced pageChangedByKeyboard property to distinguish between
keyboard and mouse wheel page changes
3. Modified onWheel handler to transfer focus to wheelFocusSink before
page navigation
4. Updated currentItemChanged handler to only reset focus when page
change was triggered by keyboard
5. Ensured pageChangedByKeyboard is set to true for all keyboard
navigation scenarios

Log: Fixed focus behavior when using mouse wheel to navigate between
folder pages

Influence:
1. Test mouse wheel scrolling between folder pages - focus should not
jump to applications
2. Verify keyboard navigation (arrow keys, Tab) still correctly focuses
applications
3. Test mixed usage of mouse wheel and keyboard navigation
4. Verify focus behavior when switching pages with both input methods
5. Test edge cases like single page folders and multi-page navigation

fix: 修复鼠标滚轮翻页时的焦点问题

1. 添加 wheelFocusSink Item 用于在鼠标滚轮滚动时捕获焦点
2. 引入 pageChangedByKeyboard 属性区分键盘和鼠标滚轮触发的翻页
3. 修改 onWheel 处理程序，在页面导航前将焦点转移到 wheelFocusSink
4. 更新 currentItemChanged 处理程序，仅在键盘触发翻页时重置焦点
5. 确保所有键盘导航场景都将 pageChangedByKeyboard 设置为 true

Log: 修复使用鼠标滚轮在文件夹页面间导航时的焦点行为

Influence:
1. 测试鼠标滚轮在文件夹页面间滚动 - 焦点不应跳转到应用程序
2. 验证键盘导航（方向键、Tab键）仍能正确聚焦应用程序
3. 测试混合使用鼠标滚轮和键盘导航的情况
4. 验证使用两种输入方法切换页面时的焦点行为
5. 测试边缘情况，如单页文件夹和多页导航

PMS: BUG-343143

Author: wjyrich

qml/FolderGridViewPopup.qml

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2024 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2024-2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -174,6 +174,13 @@ Popup {
                     Layout.fillHeight: true
                     color: "transparent"
 
+                    // 用于鼠标滚轮滚动时接收焦点，使 GridView 失去 activeFocus
+                    Item {
+                        id: wheelFocusSink
+                        width: 0
+                        height: 0
+                    }
+
                     DropArea {
                         id: folderPageDropArea
                         property int pageIntent: 0
@@ -255,6 +262,8 @@ Popup {
 
                         // TODO: this might not be the correct way to handle wheel
                         onWheel: function (wheel) {
+                            // 鼠标滚轮翻页时将焦点转移到 wheelFocusSink，使 GridView 失去 activeFocus
+                            wheelFocusSink.forceActiveFocus()
                             let xDelta = wheel.angleDelta.x / 8
                             let yDelta = wheel.angleDelta.y / 8
                             let toPage = 0; // -1 prev, +1 next, 0 don't change
@@ -281,11 +290,15 @@ Popup {
                         activeFocusOnTab: false
                         //达到起始和末尾应用按下左右键时进行标志，-1往左翻页(标志前一页的最后一个应用），0代表往右翻页（标志后一页的第一个应用）
                         property int pendingFocusIndex: 0
-                        //这里不能使用onCurrentIndexChanged 
+                        // 标记翻页是否由键盘操作触发，鼠标滚轮翻页时不应设置选中焦点
+                        property bool pageChangedByKeyboard: false
+                        //这里不能使用onCurrentIndexChanged
                         //由于如果目标页的 Loader/GridViewContainer 还没加载完成，这次设置焦点会被跳过 则默认焦点给到的页面本身而不是应用
                         onCurrentItemChanged: {
-                            if (currentItem)
+                            if (currentItem && pageChangedByKeyboard) {
                                 currentItem.resetCurrentIndex(pendingFocusIndex)
+                                pageChangedByKeyboard = false
+                            }
                         }
 
                         Connections {
@@ -417,6 +430,7 @@ Popup {
                                                 }
 
                                                 folderPagesView.pendingFocusIndex = -1
+                                                folderPagesView.pageChangedByKeyboard = true
                                                 if (folderPagesView.currentIndex === 0) {
                                                     folderPagesView.setCurrentIndex(pageCount - 1)
                                                 } else {
@@ -444,6 +458,7 @@ Popup {
                                                 }
 
                                                 folderPagesView.pendingFocusIndex = 0
+                                                folderPagesView.pageChangedByKeyboard = true
                                                 if (folderPagesView.currentIndex === (pageCount - 1)) {
                                                     folderPagesView.setCurrentIndex(0)
                                                 } else {
@@ -500,6 +515,7 @@ Popup {
                                                 }
 
                                                 folderPagesView.pendingFocusIndex = -1
+                                                folderPagesView.pageChangedByKeyboard = true
                                                 if (folderPagesView.currentIndex === 0) {
                                                     folderPagesView.setCurrentIndex(pageCount - 1)
                                                 } else {
@@ -527,6 +543,7 @@ Popup {
                                                 }
 
                                                 folderPagesView.pendingFocusIndex = 0
+                                                folderPagesView.pageChangedByKeyboard = true
                                                 if (folderPagesView.currentIndex === (pageCount - 1)) {
                                                     folderPagesView.setCurrentIndex(0)
                                                 } else {