made correction on reading logs page when no matches found

[Ayush1404]

Closes #8811

Searches on the reading log with no matches incorrectly show the "No books on this shelf" screen, this PR fixes it by showing correct error messages and other changes mentioned in issue #8811.

Technical

Testing

z

1. Go to one of your reading log shelves (eg https://openlibrary.org/people/ScarTissue/books/already-read )
2. Perform a search for something that won't match (eg "foo bar")
3. See the output and then check thr search facility by going to "Search all of Open Library for "{query}"?" button .

Screenshot

Stakeholders

@cdrini

[Ayush1404]

Hey @cdrini and @jimchamp, thank you very much for reviewing my code, I have made the necessary corrections that you suggested, can you please review if these are the changes you expected, thanks in advance :)