feat: 添加交易类型枚举，更新交易页面以支持买入和卖出功能

src/api/enum.ts

@@ -30,3 +30,8 @@ export enum GenderEnum {
   FEMALE = "female",
   OTHER = "other",
 }
+
+export enum TradeTypeEnum {
+  BUY = "buy",
+  SELL = "sell",
+}