(In reply to comment #0)

when the list is filtered to a single
user

What do you mean by this, exactly? Just when the offset is used, or when limit=1 is also specified? Or when the prefix matches one single user?
It seems a bit tricky to change the summary of special pages depending on switches they contain below.

Just passing the search string to the messages (regardless of the number of search results) should be fine, I think.

(In reply to comment #2)

Just passing the search string to the messages (regardless of the number of
search results) should be fine, I think.

It's impossible to do it "regardless of the number", which username would you pass among all those in the block log?

Adding many blockers of bug 38638 to the list of "easy" bugs, to mark them as candidates for [[mw:Google Code-in]] tasks (gci2013). If you think this bug is not suitable, remove the keyword.

I do not understand this task very well. What would a $user parameter do in https://meta.wikimedia.org/wiki/MediaWiki:Blocklogtext ?

If I am at, say, https://meta.wikimedia.org/w/index.php?title=Special%3ALog&type=block&user=&page=User%3AMeta+Willy+on+Wheels%21&year=&month=-1&tagfilter=&subtype= then I want to be able to navigate to pages like https://xtools.wmflabs.org/ec/meta.wikimedia.org/Meta%20Willy%20on%20Wheels! with a single click.

@Tgr , cannot you add a link to MediaWiki:Logentry-block-block to have that?