1.添加有未读消息状态接口和UI

workbenches/src/main/res/layout/item_free_training.xml

@@ -15,7 +15,7 @@
         android:id="@+id/gameLayout"
         android:layout_width="@dimen/divider_184px"
         android:layout_height="@dimen/divider_249px"
-        android:layout_marginTop="@dimen/divider_16px"
+        android:layout_marginTop="@dimen/divider_32px"
         app:cardCornerRadius="@dimen/divider_20px">
 
         <androidx.constraintlayout.widget.ConstraintLayout