diff --git a/app/src/main/java/com/placeholder/ringhealth/feature/home/HomeScreen.kt b/app/src/main/java/com/placeholder/ringhealth/feature/home/HomeScreen.kt
index ad40192..26bcb1c 100644
--- a/app/src/main/java/com/placeholder/ringhealth/feature/home/HomeScreen.kt
+++ b/app/src/main/java/com/placeholder/ringhealth/feature/home/HomeScreen.kt
@@ -259,6 +259,7 @@ private fun buildMetricCards(summary: HealthSummary): List<MetricCardSpec> = lis
     ),
 )
 
+/** 预览入口：以固定示例数据渲染 [HomeContent]，便于在 IDE 中免真机查看首页效果。 */
 @Preview(showBackground = true)
 @Composable
 private fun HomeContentPreview() {