修复路径在windos下读取不到的问题 (#630)

* 修复路径在windos下读取不到的问题

* opt: `local.dart` fmt

---------

Co-authored-by: Noo6 <72285529+No06@users.noreply.github.com>

lib/view/page/storage/local.dart

@@ -65,6 +65,10 @@ class _LocalFilePageState extends State<LocalFilePage>
                 final path = await Pfs.pickFilePath();
                 if (path == null) return;
                 final name = path.getFileName() ?? 'imported';
+                final destinationDir = Directory(_path.path);
+                if (!await destinationDir.exists()) {
+                  await destinationDir.create(recursive: true);
+                }
                 await File(path).copy(_path.path.joinPath(name));
                 setState(() {});
               },