fix: reduce app item border width

Changed the border width of the app item from 2px to 1px to create a
more subtle and visually appealing appearance. The previous 2px border
was too prominent and created visual clutter in the task manager
interface. This adjustment improves the overall aesthetic by making
the border less obtrusive while still maintaining the visual separation
between app items.

Influence:
1. Verify app items in the dock display with thinner borders
2. Check that the border is still visible but less prominent
3. Test hover and active states to ensure border visibility is
appropriate
4. Verify the change doesn't affect the layout or spacing of app items
5. Test with different themes to ensure consistent appearance

fix: 减小应用项边框宽度

将应用项的边框宽度从2像素改为1像素，以创建更微妙和视觉上更吸引人的外观。
之前的2像素边框过于突出，在任务管理器界面中造成了视觉混乱。此调整通过使
边框不那么突兀来改善整体美观性，同时仍保持应用项之间的视觉分隔。

Influence:
1. 验证坞站中的应用项是否显示更细的边框
2. 检查边框仍然可见但不太突出
3. 测试悬停和活动状态，确保边框可见性适当
4. 验证更改不会影响应用项的布局或间距
5. 使用不同主题测试以确保外观一致

Author: wjyrich

panels/dock/taskmanager/package/AppItemWithTitle.qml

@@ -132,7 +132,7 @@ Item {
                 color: "transparent"
                 antialiasing: true
                 border.color: Qt.rgba(0, 0, 0, 0.1)
-                border.width: 2
+                border.width: 1
 
                 Rectangle {
                     anchors.fill: parent