feat(categories): align archive and directory pages

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/Core/ScriptsPart1b.php

@@ -528,11 +528,12 @@ trait ScriptsPart1b {
 
         // 分类汇总页：路由专属 CSS
         if (is_page_template('templates/pages/page-categories.php')) {
+            $categories_css = get_template_directory() . '/assets/css/routes/categories.css';
             wp_enqueue_style(
                 'jio-route-categories',
                 $base_uri . '/assets/css/routes/categories.css',
                 ['jio-public'],
-                $version
+                file_exists($categories_css) ? (string) filemtime($categories_css) : $version
             );
         }