修复支付接口重复提交的响应问题，完善全局异常处理逻辑

web/handlers/trade.go

@@ -65,8 +65,7 @@ func TradeCreate(c *fiber.Ctx) error {
 }
 
 type TradeCompleteReq struct {
-	TradeNo string        `json:"trade_no" validate:"required"`
-	Method  trade2.Method `json:"method" validate:"required"`
+	s.ModifyTradeData
 }
 
 func TradeComplete(c *fiber.Ctx) error {
@@ -83,13 +82,39 @@ func TradeComplete(c *fiber.Ctx) error {
 	}
 
 	// 检查订单状态
-	err = s.Trade.CompleteTrade(&s.CheckTradeData{
+	err = s.Trade.CompleteTrade(&s.ModifyTradeData{
 		TradeNo: req.TradeNo,
 		Method:  req.Method,
 	})
 	if err != nil {
-		slog.Error("完成交易失败", "trade_no", req.TradeNo, "method", req.Method, "error", err)
-		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "完成交易失败"})
+		return err
+	}
+
+	return c.SendStatus(fiber.StatusNoContent)
+}
+
+type TradeCancelReq struct {
+	s.ModifyTradeData
+}
+
+func TradeCancel(c *fiber.Ctx) error {
+	// 检查权限
+	_, err := auth.Protect(c, []auth.PayloadType{auth.PayloadUser}, []string{})
+	if err != nil {
+		return err
+	}
+
+	// 解析请求参数
+	req := new(TradeCancelReq)
+	if err := g.Validator.Validate(c, req); err != nil {
+		return err
+	}
+
+	// 取消交易
+	err = s.Trade.CancelTrade(req.TradeNo, req.Method, time.Now())
+	if err != nil {
+		slog.Error("取消交易失败", "trade_no", req.TradeNo, "error", err)
+		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "取消交易失败"})
 	}
 
 	return c.SendStatus(fiber.StatusNoContent)
@@ -99,16 +124,6 @@ type TradeCheckReq struct {
 	tasks.CancelTradeData
 }
 
-func TradeCheckSSE(c *fiber.Ctx) error {
-
-	// 设置响应头
-	c.Set("Content-Type", "text/event-stream")
-	c.Set("Cache-Control", "no-cache")
-	c.Set("Connection", "keep-alive")
-
-	return nil
-}
-
 func TradeCancelByTask(c *fiber.Ctx) error {
 	// 检查权限
 	_, err := auth.Protect(c, []auth.PayloadType{auth.PayloadInternalServer}, []string{})