feat: 品种推荐与下单显示主力合约

推荐列表展示当前主力代码；下单品种支持中文/代码搜索并按交易所分组选择主力合约。

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

recommend_store.py

@@ -29,11 +29,11 @@ def filter_affordable_recommendations(rows: list[dict]) -> list[dict]:
 def refresh_recommend_cache(
     conn,
     capital: float,
-    price_fn: Callable[[str], Optional[float]],
+    quote_fn: Callable[[str], Optional[dict]],
 ) -> list[dict]:
     """后台拉行情、筛选并写入数据库。"""
     ensure_recommend_tables(conn)
-    all_rows = list_product_recommendations(capital, price_fn)
+    all_rows = list_product_recommendations(capital, quote_fn)
     rows = filter_affordable_recommendations(all_rows)
     now = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
     conn.execute(