Search sort order, layout, and Memories section behavior on mobile

[LoPeraa]

On mobile, search results are sorted by "Newest first" by default. If I change the sort to "Relevance" and then perform a new search, it resets back to "Newest first" instead of keeping my selected sort option.

Steps to reproduce:

1. Perform a search
2. Change the sort order from "Newest first" to "Relevance"
3. Perform a new search
4. The sort order is back to "Newest first"

I'd expect the selected sort order to persist across searches until manually changed again. Is this intended, or worth fixing?

For context, on Web the default is "Relevance", if I perform a search, it's directly sorted by relevance, and if I change it to "Newest first" and search again, it resets back to relevance, which also feels fine as a default behavior. So the mobile behavior just seems inconsistent with how it's handled on Web.

Also worth noting: when sorted by "Newest first" or "Oldest first", results are displayed like the regular timeline, with month/day headers. But when sorted by "Relevance", results are shown in a compact grid without any date headers, which honestly looks much better. See attached screenshots for comparison.

Newest first Sort	Relevance Sort

One more thing: when performing a search on mobile, the "Memories" section stays displayed at the top of the screen, which isn't really necessary in a search context and just takes up screen space for nothing.

[Deeds67]

#906