:art: Improve kernel API `/api/block/appendBlock` https://github.com/siyuan-note/siyuan/issues/9955

kernel/model/transaction.go

@@ -577,7 +577,24 @@ func (tx *Transaction) doAppendInsert(operation *Operation) (ret *TxErr) {
 	for i := 0; i < len(toInserts); i++ {
 		toInsert := toInserts[i]
 		if isContainer {
-			if ast.NodeSuperBlock == node.Type {
+			if ast.NodeList == node.Type {
+				// 列表下只能挂列表项，所以这里需要分情况处理 https://github.com/siyuan-note/siyuan/issues/9955
+				if ast.NodeList == toInsert.Type {
+					var childLis []*ast.Node
+					for childLi := toInsert.FirstChild; nil != childLi; childLi = childLi.Next {
+						childLis = append(childLis, childLi)
+					}
+					for _, childLi := range childLis {
+						node.AppendChild(childLi)
+					}
+				} else {
+					newLiID := ast.NewNodeID()
+					newLi := &ast.Node{ID: newLiID, Type: ast.NodeListItem, ListData: &ast.ListData{Typ: node.ListData.Typ}}
+					newLi.SetIALAttr("id", newLiID)
+					node.AppendChild(newLi)
+					newLi.AppendChild(toInsert)
+				}
+			} else if ast.NodeSuperBlock == node.Type {
 				node.LastChild.InsertBefore(toInsert)
 			} else {
 				node.AppendChild(toInsert)