修复粉尘桥拦开仓，并继续消除模拟盘嵌套握锁导致的 database is locked。

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

lib/sim/broker_lib.py

@@ -273,6 +273,8 @@ class SimBroker:
         side = (direction or "").lower().strip()
         if side not in ("long", "short"):
             raise ValueError("direction 须为 long 或 short")
+        # 行情先拉,再开库,避免握锁等网络
+        bid, ask = _ticker_bid_ask(exchange, symbol)
         conn = self.get_db()
         try:
             row = conn.execute(
@@ -289,7 +291,6 @@ class SimBroker:
             if close_c <= 0:
                 raise ValueError("平仓张数无效")
             fr = sim_fee_rate(fee_rate)
-            bid, ask = _ticker_bid_ask(exchange, symbol)
             qty = close_c * ct_sz
             pr = perp_fill(side=side, action="close", bid=bid, ask=ask, qty=qty, fee_rate=fr)
             if side == "long":
@@ -492,6 +493,10 @@ class SimBroker:
         n = int(sheets)
         if n < 1:
             return {"ok": False, "msg": "张数至少为 1"}
+        # 行情先拉,再开库,避免握锁等网络/嵌套写钱包
+        bid, ask, _ = _option_bid_ask(exchange_options, inst_id)
+        if price is not None and float(price) > 0:
+            bid = max(float(bid), float(price)) if float(price) > 0 else float(bid)
         conn = self.get_db()
         try:
             row = conn.execute(
@@ -506,9 +511,6 @@ class SimBroker:
             if close_n <= 0:
                 return {"ok": False, "msg": "平仓张数无效"}
             fr = sim_fee_rate(fee_rate)
-            bid, ask, _ = _option_bid_ask(exchange_options, inst_id)
-            if price is not None and float(price) > 0:
-                bid = max(float(bid), float(price)) if float(price) > 0 else float(bid)
             qty = close_n * ct_mult
             pr = option_fill(action="close", bid=bid, ask=ask, qty=qty, fee_rate=fr)
             credit = pr.notional - pr.fee