fix(api): 修复营销系统非直充类型字段过滤逻辑

- 在导出字段时，非直充类型(type!=1)移除充值时间和卡密字段
- 添加日志记录被移除字段及原因
- 在元数据接口中过滤营销系统非直充类型下的充值时间和卡密字段
- 保证字段显示和导出的一致性

server/internal/api/exports.go

@@ -232,7 +232,7 @@ func (a *ExportsAPI) create(w http.ResponseWriter, r *http.Request) {
 	}
 	// 不再使用白名单过滤，直接使用所有字段
 	filtered = normalized
-	// 易码通立减金：保留 order_voucher.grant_time，移除红包领取时间列，避免"领取时间"为空
+	// 易码通立减金：保留 order_voucher.grant_time，移除红包领取时间列，避免“领取时间”为空
 	if ds == "ymt" && tv == 3 {
 		deduped := make([]string, 0, len(filtered))
 		removed := []string{}
@@ -248,6 +248,22 @@ func (a *ExportsAPI) create(w http.ResponseWriter, r *http.Request) {
 		}
 		filtered = deduped
 	}
+	// 营销系统：非直充类型(type!=1)时移除recharge_time和card_code字段
+	if ds == "marketing" && tv != 1 {
+		deduped := make([]string, 0, len(filtered))
+		removed := []string{}
+		for _, tf := range filtered {
+			if tf == "order.recharge_time" || tf == "order.card_code" {
+				removed = append(removed, tf)
+				continue
+			}
+			deduped = append(deduped, tf)
+		}
+		if len(removed) > 0 {
+			logging.JSON("INFO", map[string]interface{}{"event": "fields_filtered_non_direct_charge", "removed": removed, "reason": "非直充类型不导出充值时间和卡密"})
+		}
+		filtered = deduped
+	}
 	labels := FieldLabels()
 	// 字段匹配校验（数量与顺序）
 	if len(filtered) != len(fs) {

server/internal/api/metadata.go

@@ -22,9 +22,16 @@ func MetadataHandler(meta, marketing, ymt *sql.DB) http.Handler {
 		for i := range tables {
 			var visible []fieldInfo
 			for _, f := range tables[i].Fields {
-				if !f.Hidden {
+				if f.Hidden {
-					visible = append(visible, f)
+					continue
 				}
+				// 营销系统：recharge_time和card_code字段只在直充类型(type=1)时才显示
+				if ds == "marketing" && ot != "1" {
+					if f.Key == "order.recharge_time" || f.Key == "order.card_code" {
+						continue
+					}
+				}
+				visible = append(visible, f)
 			}
 			tables[i].Fields = visible
 		}