chore: resolve undefined-field

lua/nvim-tree/api.lua

@@ -9,6 +9,7 @@ local keymap = require("nvim-tree.keymap")
 local notify = require("nvim-tree.notify")
 
 local DirectoryNode = require("nvim-tree.node.directory")
+local FileLinkNode = require("nvim-tree.node.file-link")
 local RootNode = require("nvim-tree.node.root")
 
 local Api = {
@@ -206,10 +207,8 @@ Api.fs.copy.relative_path = wrap_node(wrap_explorer_member("clipboard", "copy_pa
 ---@param mode string
 ---@param node Node
 local function edit(mode, node)
-  local path = node.absolute_path
+  local file_link = node:as(FileLinkNode)
-  if node.link_to and not node.nodes then
+  local path = file_link and file_link.link_to or node.absolute_path
-    path = node.link_to
-  end
   actions.node.open_file.fn(mode, path)
 end
 
@@ -219,10 +218,13 @@ end
 local function open_or_expand_or_dir_up(mode, toggle_group)
   ---@param node Node
   return function(node)
-    if node.name == ".." then
+    local root = node:as(RootNode)
+    local dir = node:as(DirectoryNode)
+
+    if root or node.name == ".." then
       actions.root.change_dir.fn("..")
-    elseif node:is(DirectoryNode) then
+    elseif dir then
-      node:expand_or_collapse(toggle_group)
+      dir:expand_or_collapse(toggle_group)
     elseif not toggle_group then
       edit(mode, node)
     end

lua/nvim-tree/node/directory.lua

@@ -174,7 +174,7 @@ function DirectoryNode:ungroup_empty_folders()
   end
 end
 
----@param toggle_group boolean
+---@param toggle_group boolean?
 function DirectoryNode:expand_or_collapse(toggle_group)
   toggle_group = toggle_group or false
   if self.has_children then