Setting metadata for auto-generated pages?

[DonKult]

Lets say I want to include the blog/archive page in the navbar, how best to set e.g. nav_title for this page given that it is auto-generated?

I can create the page manually, but that produces a) a warning for replacing a page and b) it has only an effect for the page itself, others still use the (not available) metadata of the auto-generated page.

Beside, it is also a bit strange that the archive page has the same title as the page they are an archive for. For taxonomies you can at least control the title (in theory, this seems broken in practice?), but again no dice for other metadata like nav_title.

(I am using/adding my own metadata fields left and right, so having a generic solution would be nice, but I guess that is features territory.)