fix: no is_trading_hours in simulation trader

src/simulation/simulation_trader.py

@@ -184,3 +184,7 @@ class SimulationTrader(BaseTrader):
                     "strategy_name": order_info.strategy_name,
                 }
         return None
+
+    def is_trading_time(self):
+        return True
+

src/trade_server.py

@@ -134,7 +134,7 @@ def buy():
             raise ValueError("Price and amount must be positive")
 
         # 检查是否在交易时间内
-        if not get_trader().is_trading_hours():
+        if not get_trader().is_trading_time():
             logger.warning(
                 f"交易失败 - 非交易时间不能交易 - 代码: {code}, 价格: {price}, 数量: {amount}"
             )