Hello,

On single post pages, the theme currently shows a “Previous article” and “Next article” navigation.
At the moment, these links only follow the general post order.

I would like to add a setting (or customization) so that this navigation only links to posts that:

1. Belong to the same category, and

2. Share at least one identical tag with the current post.

Reason:
Some posts are part of a chronological or narrative series (using a shared tag), while other posts in the same category provide background or contextual information. I want the previous/next navigation to respect the logical order of the series, without jumping to related-but-out-of-sequence background articles.

Ideal behaviour:

• Previous / Next posts are selected only from posts that match both category and tag.

• If no matching post exists, the navigation can either be hidden or fall back to category-only (optional).

Could you let me know:

• If this is already possible via theme settings or hooks?

• Or which template / function controls this navigation, so it can be customised?

Thanks in advance.