增加 (感谢 @legalaspro):
Added (thanks to @legalaspro):
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改进 ROS 2 xacro 兼容性，支持更接近 Python xacro 的属性解析方式，包括局部属性作用域、惰性属性求值、顶层属性求值，以及带替换表达式的属性解析。
Improved ROS 2 xacro compatibility with property handling closer to Python xacro, including local property scoping, lazy property evaluation, top-level property evaluation, and substitution-aware property resolution.
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支持
xacro.load_yaml()，可读取工作区内的 YAML 配置并在 xacro 表达式中使用。Support
xacro.load_yaml()for reading YAML configuration files inside the workspace and using them in xacro expressions. -
xacro 预览锁定。锁定后，保存被包含的子 xacro 文件会重新渲染当前顶层预览，而不会切换到刚保存的子文件。
Xacro preview lock. When locked, saving included child xacro files re-renders the current top-level preview instead of switching to the saved child file.
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Link 列表支持树形视图和扁平视图切换。
Support switching the Link list between tree view and flat view.
