feat: strategy trade snapshots, DCA detail, and hub trend layout

Persist ended trend pullback and roll group snapshots to a unified records page; show replenishment tiers on instance and hub cards with horizontal single-position layout.

Co-authored-by: Cursor <cursoragent@cursor.com>

strategy_roll_monitor_lib.py

@@ -76,6 +76,12 @@ def _close_roll_group(
         "UPDATE roll_groups SET status='closed', updated_at=? WHERE id=? AND status='active'",
         (_now(cfg), gid),
     )
+    try:
+        from strategy_snapshot_lib import save_roll_group_snapshot
+
+        save_roll_group_snapshot(cfg, conn, group, result_label="结束")
+    except Exception:
+        pass
 
 
 def _reconcile_roll_groups(conn, cfg: dict) -> None: