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/pages/page-newposts.php

@@ -1,11 +1,11 @@
 <?php
 /**
- * Template Name: AKSRT - New Posts
+ * Template Name: Jio - New Posts
  * Template Post Type: page
  *
  * 最新文章页：按时间倒序展示最新发布的文章。
  *
- * @package AKSRT
+ * @package Jio
  */
 
 defined('ABSPATH') || exit;
@@ -23,8 +23,8 @@ $query = new WP_Query([
 	'order'          => 'DESC',
 ]);
 
-if (function_exists('aksrt_archive_open_shell')) {
-	aksrt_archive_open_shell([
+if (function_exists('jio_archive_open_shell')) {
+	jio_archive_open_shell([
 		'main_class'  => 'site-main container page-content-default',
 		'has_sidebar' => false,
 		'page_kind'   => 'newposts',
@@ -34,35 +34,35 @@ if (function_exists('aksrt_archive_open_shell')) {
 					<div class="content-main content-main--page content-main--newposts">
 						<?php
 						get_template_part('templates/parts/page-header', null, [
-							'title' => esc_html(get_the_title() ?: __('最新文章', 'aksrt')),
+							'title' => esc_html(get_the_title() ?: __('最新文章', 'jio')),
 						]);
 						?>
 
-						<div class="aksrt-newposts">
+						<div class="jio-newposts">
 							<?php if ($query->have_posts()) : ?>
-								<div class="aksrt-newposts__list">
+								<div class="jio-newposts__list">
 									<?php while ($query->have_posts()) : $query->the_post(); ?>
-										<article class="aksrt-newposts__item">
-											<span class="aksrt-newposts__date"><?php echo esc_html(get_the_date()); ?></span>
-											<h3 class="aksrt-newposts__title">
+										<article class="jio-newposts__item">
+											<span class="jio-newposts__date"><?php echo esc_html(get_the_date()); ?></span>
+											<h3 class="jio-newposts__title">
 												<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
 											</h3>
-											<p class="aksrt-newposts__excerpt"><?php echo esc_html(wp_trim_words(get_the_excerpt(), 30)); ?></p>
+											<p class="jio-newposts__excerpt"><?php echo esc_html(wp_trim_words(get_the_excerpt(), 30)); ?></p>
 										</article>
 									<?php endwhile; ?>
 								</div>
 								<?php
-								aksrt_render_pagination($query);
+								jio_render_pagination($query);
 								wp_reset_postdata();
 								?>
 							<?php else : ?>
-								<p class="aksrt-newposts__empty content-stream__empty"><?php esc_html_e('暂无文章。', 'aksrt'); ?></p>
+								<p class="jio-newposts__empty content-stream__empty"><?php esc_html_e('暂无文章。', 'jio'); ?></p>
 							<?php endif; ?>
 						</div>
 					</div>
 <?php
-if (function_exists('aksrt_archive_close_shell')) {
-	aksrt_archive_close_shell(['has_sidebar' => false]);
+if (function_exists('jio_archive_close_shell')) {
+	jio_archive_close_shell(['has_sidebar' => false]);
 }
 
 get_footer();