EML wrote
it's seriously just a list of links? I'd like to look at the source markup, but I can't find the sidebar page anywhere. [...]
Anyone know what the page is a called, so I can look at it?
See
https://www.dokuwiki.org/aside
Because there is a plugin and a template called "sidebar" we changed the ID to something else on dokuwiki.org.
EML wrote
I couldn't find a live site with simplenavi, so it's not obvious what it actually looks like. Maybe I should install it and see.
IIRC it looks exactly like the sitemap/index. So, it takes a styling which already exists (basically just links in a big collapsible list).
I can also recommend the
navi plugin. That looks very similar but is more flexible.