Requested feature overview description.
On the notes search page, add a field for post ID. On the notes versions page, add the same search form that already appears on the notes page.
Why would it be useful?
Firstly, why the hell is this not already a thing?
Anyway, one case which keeps coming up every time I delve into the ambiguous character tags is those wall-of-characters posts that a bunch of people thought would be hilarious to upload circa 10 years ago. Sometimes I get lucky and some (or many) kind soul has marked out every character with notes.
Today it was post #248416. I wanted to know why the fiona tag was on that image, so I clicked on the notes history to get a link that would highlight whichever note said "Fiona". There are eight pages of notes history. Do I want to do the Ctrl-F/click next shuffle yet again? No, but there is seemingly no search available on the current page, so I copy the post ID and then click the "Search" link at the top. Inexplicably, this only offers three possible fields to search by: "Body", "Author" and "Tags". Despite the fact I was literally just looking at a list of notes filtered by post ID.
After comparing the format of the two URLs, I determined that both of the following manually crafted links work as expected:
https://e621.net/notes?commit=Search&search[body_matches]=Fiona&search[post_id]=248416
https://e621.net/note_versions?search[post_id]=248416&search[body_matches]=Fiona
So it's literally just a user interface side problem. Add an extra field to the search form and everyone's happy. The same search form should also appear in the same place when looking at the list of versions, with post ID automatically filled in if you clicked the history link from a post page, exactly the same as tags history already works.
I will emphasise again that all of this is already fully implemented - it just needs to be exposed.
It was princess_fiona, BTW, and yes of course that tag was already on the same post. These days I say "fuck klorpa " like a Catholic makes the sign of the cross.
What part(s) of the site page(s) are affected?
Notes search, notes history