about public_url

ui相关设置public_url是否可以是使用cdn链接，以及public_url涉及到具体目录是什么

Whether the ui-related settings public _ URL can use CDN links, and what specific directories are involved in public _ URL

No files, tests, or entry points are named in the issue. First locate the public_url configuration and the UI asset path handling, then determine the expected CDN behavior and which directories it covers. Done means documenting or implementing an agreed answer, with verification for the supported configuration.

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