search: auto-focus search field on navigate

I'm going to add a search changelog on this commit since I forgot
to do so previously.

Fixes: https://linear.app/damus/issue/DECK-538/auto-focus-search-field-on-search-view
Changelog-Added: Added fulltext search ui
Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck_columns/src/route.rs

@@ -25,7 +25,6 @@ pub enum Route {
     EditProfile(Pubkey),
     Support,
     NewDeck,
-    /// Search screen
     Search,
     EditDeck(usize),
 }