the search box slides up under the header after use

the search box slides up about 1/2 way under the header after submitting the search.

reproducible in jasonpedia.

Start by reproducing the search-box behavior in Jasonpedia on iOS: submit a search and observe how the box moves under the header. Trace the search submission and resulting layout behavior, then verify that the search box remains correctly positioned after submission.

Written by the indexing model from the issue text.