fix(admin): replicate reference advanced-filter settings page 1:1

- Rewrite post_list/filter schema (PHP + JS) with the reference theme's
  field set, order, defaults and dependencies; topics fields excluded
  (no topics taxonomy), AKSRT private filter_* toggles dropped
- Support dynamic checkbox options in AksField (options as formData key)
  so cat_custom_filter.custom_filters lists the custom_filter dimensions
- Map PostDisplay filter settings to the new keys without legacy fallback;
  cat_custom_filter now carries lists/dropdown fieldsets and array filters
- Wire the archive chain to reference semantics: cat_custom_filter
  overrides per-category filter projects, custom_filter_show gates the
  default display, dimension chip groups render on category/tag archives
- Filter archive queries (main query + AJAX endpoint) by _aksrt_cf_{key}
  meta with exact-quoted LIKE matching
- Add advanced-filter settings reference contract test

src/Settings/DisplayPageGroups.php

@@ -231,10 +231,9 @@ trait DisplayPageGroups {
             'list' => $list,
             'thumb' => $thumb,
             'filter' => [
-                'filter_enabled'    => $filter['enabled'],
-                'filter_categories' => $filter['categories'],
-                'filter_tags'       => $filter['tags'],
-                'filter_sort'       => $filter['sort'],
+                'custom_filter_show' => $filter['custom_filter_show'],
+                'custom_filter'      => $filter['custom_filter'],
+                'cat_custom_filter'  => $filter['cat_custom_filter'],
             ],
         ];
     }