fix(trade): LIMIT calculated quantity algorithm

Closes #6

main.py

@@ -160,26 +160,6 @@ class MexcSpotTrade:
         self.csv_file = f"output/{config_file_name}.csv"
         self.symbol_mapping = symbol_mapping
 
-    def _api_get_balance(self) -> str:
-        """
-        获取账户余额
-
-        Returns:
-            账户余额字典或None(如果失败)
-        """
-        try:
-            logger.info("查询账户余额")
-            account_info = self.trader.get_account_info()
-            account_info_balance = account_info.get("balances", [])
-            balances = ""
-            for item in account_info_balance:
-                balances += f"{item['available']} {item['asset']}  "
-            logger.info("获取账户余额成功")
-            return balances
-        except Exception as e:
-            logger.error("查询账户信息失败: %s", str(e))
-            return f"ERROR: {str(e)}"
-
     def _api_get_order(self, symbol: str, order_id: str) -> Optional[Dict[str, Any]]:
         """
         查询订单状态
@@ -271,7 +251,6 @@ class MexcSpotTrade:
             executed_qty = order_data["executedQty"]
             cummulative_quote_qty = order_data["cummulativeQuoteQty"]
             side = order_data["side"]
-            balances = self._api_get_balance()
 
             # 确定交易类型显示
             trade_type = "买入" if side == "BUY" else "卖出"
@@ -289,7 +268,6 @@ class MexcSpotTrade:
                 "资金账户",
                 "CEX",
                 f"MEXC API - Order ID: {order_id}",
-                balances
             ]
 
             # 检查文件是否存在
@@ -314,7 +292,6 @@ class MexcSpotTrade:
                             "现金账户",
                             "目标账户",
                             "备注",
-                            "balances"
                         ]
                     )
                 writer.writerow(row)