fix: disable dock panel dragging when locked

1. Added enabled property binding to prevent dock panel dragging when
Panel.locked is true
2. This ensures the dock panel cannot be accidentally moved when the
panel is locked
3. Maintains existing cursor shape behavior that shows locked state
4. Improves user experience by preventing unintended interactions with
locked panels

fix: 锁定状态下禁用停靠面板拖动

1. 添加 enabled 属性绑定，当 Panel.locked 为 true 时防止停靠面板拖动
2. 确保面板锁定时不会意外移动停靠面板
3. 保持现有的光标形状行为以显示锁定状态
4. 通过防止与锁定面板的意外交互来改善用户体验

PMS: TASK-383127

Author: wjyrich

panels/dock/package/main.qml

@@ -539,6 +539,7 @@ Window {
         property int averageCount: 5
         hoverEnabled: true
         propagateComposedEvents: true
+        enabled: !Panel.locked
 
         cursorShape: {
             if (Panel.locked) {