PrefacedCorg
9fb18e020e
```
fix(ui): 修复画布界面元素布局和间距问题
- 修复背景设置面板的位置偏移问题，调整Margin值从-115,-360,-55,50到-189,-360,-55,50
- 为各个工具面板添加设计时可见性属性(d:Visibility="Visible")以便预览
- 修复多个堆叠面板的Spacing属性，将负值改为正值以正确显示元素间距
- 在各个工具菜单区域添加中文注释标识(如<!--笔菜单-->, <!--橡皮菜单-->等)
- 调整了工具面板中的Spacing属性从-2到2，解决元素重叠问题
```
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