fix: fix array to tree when parentNode is null

packages/server/src/helpers/tree.helper.ts

@@ -16,6 +16,7 @@ export function array2tree(list) {
         list[map[node.parentDocumentId]].children.push(node);
       } else {
         node.parentDocumentId = null; // 该节点的父节点无法访问
+        roots.push(node);
       }
     } else {
       roots.push(node);

packages/server/src/services/document.service.ts

@@ -816,7 +816,7 @@ export class DocumentService {
       delete doc.state;
     });
 
-    return array2tree(docs.map((doc) => instanceToPlain(doc)));
+    return array2tree(docs);
   }
 
   /**