Clearer urls

[vikiival]

make it so hitting enter without searching for anything would not write search query param into the url

Originally posted by @daiagi in #5170 (comment)

[kodabot]

ASSIGNED - @Jarsen136 🔒 LOCKED -> Wednesday, March 8th 2023, 24:16:05 UTC -> 36 hours

[Jarsen136]

make it so hitting enter without searching for anything would not write search query param into the url

We should not write the search query if the keyword is empty. That's right.
However, we still need to do searching again once hitting enter, because it could remove the search results that come from other non-empty keywords.