feat(web): visit 204 response, up page header/sort, trim system page

reaction_board/web/queries.py

@@ -1700,7 +1700,6 @@ class DashboardQueries:
                     "ok": by_ok.get(1, 0),
                     "failed": by_ok.get(0, 0),
                 }
-            folders = self._folders_overview(conn)
             blacklist = [
                 dict(row) for row in conn.execute(
                     """
@@ -1742,7 +1741,6 @@ class DashboardQueries:
                 "snapshot_days": snapshot_days,
                 "snapshot_health": health,
                 "counts": counts,
-                "folders": folders,
                 "blacklist": blacklist,
                 "tasks": tasks,
                 "errors": errors,