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/shortcodes/archive.php

@@ -1,13 +1,13 @@
 <?php
 /**
- * Shortcode template: [aksrt_archive]
+ * Shortcode template: [jio_archive]
  *
- * 紧凑版文章归档（按年月分组）。供 \AKSRT\Core\Shortcodes::render_archive() 通过
- * \AKSRT\Core\Templates::render_archive_shortcode() 以输出缓冲方式 include。
+ * 紧凑版文章归档（按年月分组）。供 \Jio\Core\Shortcodes::render_archive() 通过
+ * \Jio\Core\Templates::render_archive_shortcode() 以输出缓冲方式 include。
  *
  * 可用变量：$attrs（短代码属性）、$content。
  *
- * @package AKSRT
+ * @package Jio
  */
 
 defined('ABSPATH') || exit;
@@ -25,23 +25,23 @@ $rows = $wpdb->get_results(
 ); // phpcs:ignore WordPress.DB.DirectDatabaseQuery
 
 if (empty($rows)) {
-	echo '<div class="aksrt-archives aksrt-archives--shortcode aksrt-archives--empty">'
-		. esc_html__('暂无文章。', 'aksrt') . '</div>';
+	echo '<div class="jio-archives jio-archives--shortcode jio-archives--empty">'
+		. esc_html__('暂无文章。', 'jio') . '</div>';
 	return;
 }
 
 $current_year = 0;
 $shown = 0;
 ?>
-<div class="aksrt-archives aksrt-archives--shortcode">
+<div class="jio-archives jio-archives--shortcode">
 	<?php foreach ($rows as $row) :
 		if ((int) $row->year !== $current_year) :
 			$current_year = (int) $row->year;
 	?>
-		<h2 class="aksrt-archives__year"><?php echo esc_html((string) $current_year); ?></h2>
+		<h2 class="jio-archives__year"><?php echo esc_html((string) $current_year); ?></h2>
 	<?php endif; ?>
-		<h3 class="aksrt-archives__month"><?php echo esc_html(sprintf(__('%1$d 月（%2$d 篇）', 'aksrt'), (int) $row->month, (int) $row->count)); ?></h3>
-		<ul class="aksrt-archives__list">
+		<h3 class="jio-archives__month"><?php echo esc_html(sprintf(__('%1$d 月（%2$d 篇）', 'jio'), (int) $row->month, (int) $row->count)); ?></h3>
+		<ul class="jio-archives__list">
 			<?php
 			$month_posts = get_posts([
 				'year'           => (int) $row->year,
@@ -56,9 +56,9 @@ $shown = 0;
 				}
 				$shown++;
 			?>
-			<li class="aksrt-archives__item">
-				<span class="aksrt-archives__date"><?php echo esc_html(get_the_date('m-d', $mp)); ?></span>
-				<a href="<?php echo esc_url(get_permalink($mp->ID)); ?>" class="aksrt-archives__link"><?php echo esc_html(get_the_title($mp)); ?></a>
+			<li class="jio-archives__item">
+				<span class="jio-archives__date"><?php echo esc_html(get_the_date('m-d', $mp)); ?></span>
+				<a href="<?php echo esc_url(get_permalink($mp->ID)); ?>" class="jio-archives__link"><?php echo esc_html(get_the_title($mp)); ?></a>
 			</li>
 			<?php endforeach; ?>
 		</ul>