Lazily load Read More items.

[dbrant]

Since PCS now allows us to load Read More items lazily, let's plug into that functionality.
This saves an entire API call when browsing any article, and only loads Read More items if the user scrolls all the way to the bottom.

https://phabricator.wikimedia.org/T353188

[cooltey]

I notice the read more does not work correctly for zhwiki and jawiki, which seems like an encoded issue.

When I read article "Dog" in either jawiki or zhwiki:
https://ja.wikipedia.org/w/api.php?format=json&formatversion=2&origin=*&action=query&prop=pageimages%7Cdescription&piprop=thumbnail&pithumbsize=160&pilimit=3&generator=search&gsrsearch=morelike%3A%25E3%2582%25A4%25E3%2583%258C&gsrnamespace=0&gsrlimit=3&gsrqiprofile=classic_noboostlinks&uselang=content&smaxage=86400&maxage=86400

https://zh.wikipedia.org/w/api.php?format=json&formatversion=2&origin=*&action=query&prop=pageimages%7Cdescription&piprop=thumbnail&pithumbsize=160&pilimit=3&generator=search&gsrsearch=morelike%3A%25E5%25A4%25A7%25E4%25B8%258D%25E9%2587%258C%25E5%25A3%25AB&gsrnamespace=0&gsrlimit=3&gsrqiprofile=classic_noboostlinks&uselang=content&smaxage=86400&maxage=86400

The correct API request should be something like this:
https://zh.wikipedia.org/w/api.php?format=json&formatversion=2&origin=*&action=query&prop=pageimages|description&piprop=thumbnail&pithumbsize=160&pilimit=3&generator=search&gsrsearch=morelike:%E7%8B%97&gsrnamespace=0&gsrlimit=3&gsrqiprofile=classic_noboostlinks&uselang=content&smaxage=86400&maxage=86400

Do we need to fix it on the client side or the API side?

[dbrant]

I notice the read more does not work correctly for zhwiki and jawiki, which seems like an encoded issue.

@cooltey Well that's annoying, and a good catch. I definitely thought this was tested with non-ascii page titles.
It's definitely an issue on the PCS side (I made a task), and will be fixed there, independent of this PR.