refactor: rename the theme brand and every identifier from AKSRT to Jio

Full-project rename. `git grep -i aksrt` is now empty apart from the
DBMigrator 3.3.0 changelog note that documents the rename itself.

Code identifiers
- PHP namespace AKSRT\ -> Jio\ (composer PSR-4 + 378 declarations)
- global constants AKSRT_* -> JIO_* (VERSION/DIR/URI, PAY_TYPE_*, CAPTCHA_*)
- procedural functions, hooks, options, meta keys, table names,
  cookies, query vars, ajax actions and nonces: aksrt_ -> jio_
- text domain aksrt -> jio; Theme Name -> Jio
- JS globals: aksrtData/aksrtAdminData/... -> jioData/jioAdminData/...,
  window.AKSRTCaptcha & friends -> window.JioCaptcha, Aksrt* -> Jio*
- Vue components Aks*.vue -> Jio*.vue (15 files renamed + imports)
- CSS classes/data-attrs/custom properties: aksrt- -> jio-
- REST namespace aksrt/v1 -> jio/v1 (incl. payment gateway callbacks)

Storage layer
- DB tables {prefix}aksrt_* -> {prefix}jio_*; SCHEMA_VERSION 3.2.0 -> 3.3.0
  so dbDelta creates the new names on install
- widget id_base aksrt_widget_* -> jio_widget_*
- uninstall.php drop list rebuilt from the actual migrator tables
  (dropped 3 stale entries, added the 17 missing ones)

Removed
- hardcoded https://api.aksrt.com/version.json default update endpoint;
  get_endpoint() now reads the 「更新端点」 setting and do_check() no-ops
  when it is empty

Files renamed: inc/helpers/aksrt-*.php -> jio-*.php (54),
assets/admin/src/components/form/Aks*.vue -> Jio*.vue (15).
Build artifacts regenerated: assets/css/build, assets/js/runtime,
assets/admin/build.

Verified: audit-psr4-paths errors=0, audit-admin-contracts errors=0
(warnings=56, unchanged baseline), 813/813 widget-system tests,
44/44 phpunit, php -l clean across all PHP.

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

templates/parts/docs/doc-tree.php

@@ -4,13 +4,13 @@
  *
  * 文档模式树形导航：递归展示文档层级结构。
  *
- * @package AKSRT
+ * @package Jio
  */
 
 defined('ABSPATH') || exit;
 
-if (!function_exists('aksrt_render_doc_tree')) {
-	function aksrt_render_doc_tree($parent_id, $current_id, $depth = 0) {
+if (!function_exists('jio_render_doc_tree')) {
+	function jio_render_doc_tree($parent_id, $current_id, $depth = 0) {
 		$children = get_pages([
 			'parent'      => $parent_id,
 			'sort_column' => 'menu_order, post_title',
@@ -19,14 +19,14 @@ if (!function_exists('aksrt_render_doc_tree')) {
 		if (empty($children)) return;
 
 		$indent = str_repeat('  ', $depth);
-		echo $indent . '<ul class="aksrt-doc-tree__level aksrt-doc-tree__level--' . esc_attr((string) ($depth + 1)) . '">';
+		echo $indent . '<ul class="jio-doc-tree__level jio-doc-tree__level--' . esc_attr((string) ($depth + 1)) . '">';
 		foreach ($children as $child) {
 			$is_current = ($child->ID === $current_id);
 			$has_children = (int) get_pages(['child_of' => $child->ID, 'parent' => $child->ID, 'hide_empty' => true, 'fields' => 'ids']) > 0;
-			echo $indent . '  <li class="aksrt-doc-tree__item' . ($is_current ? ' is-current' : '') . '">';
+			echo $indent . '  <li class="jio-doc-tree__item' . ($is_current ? ' is-current' : '') . '">';
 			echo '<a href="' . esc_url(get_permalink($child->ID)) . '">' . esc_html($child->post_title) . '</a>';
 			if ($has_children && $depth < 3) {
-				aksrt_render_doc_tree($child->ID, $current_id, $depth + 1);
+				jio_render_doc_tree($child->ID, $current_id, $depth + 1);
 			}
 			echo '</li>';
 		}
@@ -38,9 +38,9 @@ $current_id = get_the_ID();
 $root_id    = wp_get_post_parent_id($current_id) ?: $current_id;
 ?>
 
-<nav class="aksrt-doc-tree" aria-label="<?php esc_attr_e('文档树', 'aksrt'); ?>">
-	<div class="aksrt-doc-tree__root">
+<nav class="jio-doc-tree" aria-label="<?php esc_attr_e('文档树', 'jio'); ?>">
+	<div class="jio-doc-tree__root">
 		<a href="<?php echo esc_url(get_permalink($root_id)); ?>"><?php echo esc_html(get_the_title($root_id)); ?></a>
 	</div>
-	<?php aksrt_render_doc_tree($root_id, $current_id); ?>
+	<?php jio_render_doc_tree($root_id, $current_id); ?>
 </nav>