fix(api): 修复 merchant_id 过滤条件冲突问题

- 当存在非零 reseller_id_eq 时，跳过 merchant_id_in 过滤以避免条件冲突
- 兼容 YMT 数据源 merchant_id 与 reseller_id 的映射关系
- 在 SQL 构建器中新增对 merchant_id_in 的支持，保证查询过滤生效
- 优化 URL 参数解析逻辑，避免无效或重复的过滤条件注入

server/internal/api/exports.go

@@ -156,7 +156,17 @@ func (a *ExportsAPI) create(w http.ResponseWriter, r *http.Request) {
 	// 注意：不再从 URL 参数 userId 或 current_user_id 自动转换为 creator_in 过滤
 	// current_user_id 仅用于记录导出任务的 owner，不用于数据过滤
 	// support multiple merchantId in query: e.g., merchantId=1,2,3 → filters.merchant_id_in
+	// 注意：对于 YMT 数据源，reseller_id_eq 和 merchant_id_in 映射到同一物理列 order_info.merchant_id，
+	// 当 reseller_id_eq 已存在且非零时，跳过 merchantId URL 参数注入以避免冲突导致过滤条件丢失
 	{
+		skipMerchantIdIn := false
+		// 当 reseller_id_eq 已存在且非零时，跳过 merchantId URL 参数注入
+		// YMT: reseller_id_eq 和 merchant_id_in 映射同一物理列 order_info.merchant_id，注入会导致冲突
+		// Marketing: merchant_id_in 未在 schema 中定义，但其存在会阻止 reseller_id_eq 的应用
+		if v, ok := p.Filters["reseller_id_eq"]; ok && v != nil && v != "" && v != 0 {
+			skipMerchantIdIn = true
+		}
+		if !skipMerchantIdIn {
 			midStr := r.URL.Query().Get("merchantId")
 			if midStr != "" {
 				parts := strings.Split(midStr, ",")
@@ -177,6 +187,7 @@ func (a *ExportsAPI) create(w http.ResponseWriter, r *http.Request) {
 				}
 			}
 		}
+	}
 
 	// DEBUG LOGGING
 	logging.JSON("INFO", map[string]interface{}{

server/internal/exporter/sqlbuilder.go

@@ -317,6 +317,13 @@ func BuildSQLWithFields(req BuildRequest, whitelist map[string]bool) (string, []
 			where = append(where, fmt.Sprintf("`%s`.%s IN (%s)", sch.TableName(tbl), escape(col), ph))
 			args = append(args, creatorArgs...)
 		}
+	} else if hasMerchant {
+		if tbl, col, ok := sch.FilterColumn("merchant_id_in"); ok {
+			ph := strings.Repeat("?,", len(merchantArgs))
+			ph = strings.TrimSuffix(ph, ",")
+			where = append(where, fmt.Sprintf("`%s`.%s IN (%s)", sch.TableName(tbl), escape(col), ph))
+			args = append(args, merchantArgs...)
+		}
 	}
 
 	if v, ok := req.Filters["create_time_between"]; ok {
@@ -647,6 +654,13 @@ func BuildCountSQL(req BuildRequest, whitelist map[string]bool) (string, []inter
 			where = append(where, fmt.Sprintf("`%s`.%s IN (%s)", sch.TableName(tbl), escape(col), ph))
 			args = append(args, creatorArgs...)
 		}
+	} else if hasMerchant {
+		if tbl, col, ok := sch.FilterColumn("merchant_id_in"); ok {
+			ph := strings.Repeat("?,", len(merchantArgs))
+			ph = strings.TrimSuffix(ph, ",")
+			where = append(where, fmt.Sprintf("`%s`.%s IN (%s)", sch.TableName(tbl), escape(col), ph))
+			args = append(args, merchantArgs...)
+		}
 	}
 
 	// build WHERE from other filters