diff --git a/backend/models/collector.go b/backend/models/collector.go
index a5df2b8..e26d0f2 100644
--- a/backend/models/collector.go
+++ b/backend/models/collector.go
@@ -66,6 +66,11 @@ func (c *Collector) Sanitized() map[string]interface{} {
 		"cluster":          cluster,
 		"targetDeployment": c.TargetDeployment,
 		"namespace":        c.Namespace,
+		// 采集范围配置：必须一起输出，否则前端编辑框读不到（显示为空），
+		// 用户一保存就会把现有配置写空 —— 这是重构加 Sanitized() 时漏字段导致的回归。
+		"targetNamespaces": c.TargetNamespaces,
+		"appLabelSource":   c.AppLabelSource,
+		"appInclude":       c.AppInclude,
 		"logPath":          c.LogPath,
 		"labels":           c.Labels,
 		"status":           c.Status,