Allow searching across multiple categories

[JammyDodger]

有了新的过滤器，这将成为可能。

Experimental topics list filter feature

We have recently introduced an innovative /filter route, enabling more sophisticated filtering of the topics list. Significantly, this marks the initial step towards a unified topic filtering language for both search and filtering. Additionally, the dedicated route for topic list filtering enhances the customizability of the sidebar, as users can now incorporate links as custom section links within the sidebar. How to turn it on Enable the experimental_topics_filter site settings in the admin i…

不过仍处于实验阶段，但已在 Meta 上上线，如果您想尝试一下。