android: search narrows the board in view, and combines with its filters

As on the web, the search box is now one more facet on the board you are
looking at, rather than a separate unfiltered search. "These words, in
notes tagged grocery" works: on the main board the text is sent to the
core together with the Filters sheet's tags, attachment and shared
switches, and the core ANDs them in list_notes. Archive, Trash and a
tag's view take the text alone. A search typed on Reminders, which is not
a board view, moves to the main board, as the web does.

The Filters chip stays while you search; it was hidden before, on the
mistaken claim that the web hides its filters too. Drag-to-reorder stays
off during a search, since a filtered subset can't be renumbered against
notes it can't see.

store::search and the FFI's search_notes had no other callers, and are
removed. They also searched archived notes and ignored pinning, which the
board's query does not.

Scribe #2942.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

core/src/local/store.rs

@@ -515,15 +515,6 @@ pub fn titles(conn: &Connection) -> rusqlite::Result<Vec<TitleEntry>> {
         .collect())
 }
 
-pub fn search(conn: &Connection, q: &str) -> rusqlite::Result<Vec<Note>> {
-    let pat = format!("%{}%", escape_like(q));
-    notes_where(
-        conn,
-        "SELECT id FROM notes WHERE trashed = 0 AND body LIKE ?1 ESCAPE '\\' ORDER BY updated_at DESC",
-        [&pat],
-    )
-}
-
 // ---- notes: write -----------------------------------------------------------
 
 pub fn create_note(conn: &Connection, input: &NoteCreateInput) -> rusqlite::Result<Note> {