Introduce the `laySearch` option to enable the search functionality on list
page search boxes. This improvement allows users to have a more intuitive
and interactive way of searching through the list data by providing a search
box with clear and concise feedback.
When `laySearch` is set to true, the corresponding search box will now
be equipped with the `lay-search` class which enhances the user interface
and experience.
category selection in both add and edit pages of the mall goods module.
- Modify the corresponding JS file to support the new category display format.
- Refactor controller code to assign categories using a more efficient method.
- Ensure consistent category data processing across all related views.
Note: This change updates the way categories are presented to the admin user,
enhancing usability and maintainability of the goods management system.
