feat(api): 增强导出数据处理逻辑以支持支付状态和活动渠道字段

在exports.go中添加支付状态检查逻辑，确保仅在订单已支付时展示活动渠道字段。同时，新增辅助函数以处理支付状态的解析，提升导出数据的准确性和可读性。

server/internal/api/exports.go

@@ -1058,6 +1058,19 @@ func (a *ExportsAPI) download(w http.ResponseWriter, r *http.Request, id string)
 }
 
 func transformRow(ds string, fields []string, vals []string) []string {
+	payStatusIdx := -1
+	for i := range fields {
+		if fields[i] == "order.pay_status" {
+			payStatusIdx = i
+			break
+		}
+	}
+	isPaid := func() bool {
+		if payStatusIdx < 0 || payStatusIdx >= len(vals) {
+			return true
+		}
+		return paidStatus(ds, vals[payStatusIdx])
+	}()
 	for i := range fields {
 		if i >= len(vals) {
 			break
@@ -1076,10 +1089,79 @@ func transformRow(ds string, fields []string, vals []string) []string {
 				vals[i] = decodeOrderKey(vals[i])
 			}
 		}
+		if f == "activity.channels" {
+			if vals[i] == "" || vals[i] == "0" {
+				vals[i] = "无"
+				continue
+			}
+			if !isPaid {
+				vals[i] = "无"
+				continue
+			}
+			var arr []map[string]interface{}
+			if err := json.Unmarshal([]byte(vals[i]), &arr); err != nil {
+				vals[i] = "无"
+				continue
+			}
+			names := make([]string, 0, len(arr))
+			for _, item := range arr {
+				if v, ok := item["pay_name"].(string); ok && strings.TrimSpace(v) != "" {
+					names = append(names, v)
+					continue
+				}
+				if v, ok := item["name"].(string); ok && strings.TrimSpace(v) != "" {
+					names = append(names, v)
+				}
+			}
+			if len(names) == 0 {
+				vals[i] = "无"
+			} else {
+				vals[i] = strings.Join(names, ",")
+			}
+		}
 	}
 	return vals
 }
 
+func paidStatus(ds, status string) bool {
+	s := strings.TrimSpace(status)
+	if s == "" {
+		return false
+	}
+	// handle numeric codes
+	numeric := -1
+	if allDigits(s) {
+		if n, err := strconv.Atoi(s); err == nil {
+			numeric = n
+		}
+	}
+	switch ds {
+	case "marketing":
+		if numeric >= 0 {
+			// 1:待支付 2:已支付 3:已退款
+			return numeric == 2 || numeric == 3
+		}
+		return s == "已支付" || s == "已退款"
+	case "ymt":
+		if numeric >= 0 {
+			// 1:待支付 2:支付中 3:已支付 4:取消支付 5:退款中 6:退款成功
+			return numeric == 3 || numeric == 6 || numeric == 5
+		}
+		return s == "已支付" || s == "退款成功" || s == "退款中"
+	default:
+		return strings.Contains(s, "支付") && !strings.Contains(s, "待")
+	}
+}
+
+func allDigits(s string) bool {
+	for _, c := range s {
+		if c < '0' || c > '9' {
+			return false
+		}
+	}
+	return true
+}
+
 func decodeOrderKey(s string) string {
 	if s == "" {
 		return s