Can't reference other notes through relative links

Steps to reproduce

• Create a Markdown file named index.md with e.g. the following content

# Index

- [Topic A](./A.md)

• Create a file named A.md in the same directory

• Try and click on the link in index.md

Expected behaviour

The note object linked to A.md should be opened

Actual behaviour

The URL is resolved with respect to the current note ID prefix, so the redirect goes to /apps/notes/note/A.md, which doesn't exist.

This is particularly relevant when using something like e.g. vimwiki (or anything that allows you to manage Wiki-like notes in Markdown format). Relative URLs in these context are usually resolved to file names, but Nextcloud Notes works with internal note IDs instead.

Would it be possible to add an intermediate resolver that checks if the requested URL points to a file indexed as a note, and in that case redirect the user to the right URL?

Reproduce the link from index.md to A.md, then trace how relative Markdown URLs are resolved and how indexed note filenames map to internal note IDs. Done means a same-directory link opens the note represented by A.md instead of redirecting to the unresolved /apps/notes/note/A.md URL.