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-sign.php

@@ -1,9 +1,9 @@
 <?php
 /**
- * Template Name: AKSRT - 登录注册
+ * Template Name: Jio - 登录注册
  * Template Post Type: page
  *
- * @package AKSRT
+ * @package Jio
  */
 
 defined('ABSPATH') || exit;
@@ -11,8 +11,8 @@ defined('ABSPATH') || exit;
 $allowed_tabs = ['signin', 'signup', 'resetpassword', 'bind', 'oauth'];
 $tab = isset($_GET['tab']) ? sanitize_key(wp_unslash((string) $_GET['tab'])) : 'signin';
 $tab = in_array($tab, $allowed_tabs, true) ? $tab : 'signin';
-$wechat = class_exists('\AKSRT\Settings\Settings') ? \AKSRT\Settings\Settings::get_weixingzh_settings() : [];
-if (!isset($_GET['tab']) && !empty($wechat['priority']) && class_exists('\AKSRT\Auth\WeixinGzh') && \AKSRT\Auth\WeixinGzh::is_enabled()) {
+$wechat = class_exists('\Jio\Settings\Settings') ? \Jio\Settings\Settings::get_weixingzh_settings() : [];
+if (!isset($_GET['tab']) && !empty($wechat['priority']) && class_exists('\Jio\Auth\WeixinGzh') && \Jio\Auth\WeixinGzh::is_enabled()) {
 	$tab = 'oauth';
 }
 $interim = isset($_REQUEST['interim-login']);
@@ -22,23 +22,23 @@ if (is_user_logged_in() && $tab !== 'bind' && $tab !== 'oauth') {
 	wp_safe_redirect($redirect_to);
 	exit;
 }
-if (class_exists('\AKSRT\Settings\Settings') && \AKSRT\Settings\Settings::close_sign() && !$interim) {
+if (class_exists('\Jio\Settings\Settings') && \Jio\Settings\Settings::close_sign() && !$interim) {
 	wp_safe_redirect(home_url('/'));
 	exit;
 }
-if ($tab === 'signup' && class_exists('\AKSRT\Settings\Settings') && !\AKSRT\Settings\Settings::registration_enabled()) {
+if ($tab === 'signup' && class_exists('\Jio\Settings\Settings') && !\Jio\Settings\Settings::registration_enabled()) {
 	$tab = 'signin';
 }
 
-remove_action('wp_footer', 'aksrt_render_footer_tabbar', 20);
-remove_action('wp_footer', 'aksrt_render_float_buttons', 30);
-$ui = class_exists('\AKSRT\Settings\Settings') ? \AKSRT\Settings\Settings::sign_page_ui() : [];
+remove_action('wp_footer', 'jio_render_footer_tabbar', 20);
+remove_action('wp_footer', 'jio_render_float_buttons', 30);
+$ui = class_exists('\Jio\Settings\Settings') ? \Jio\Settings\Settings::sign_page_ui() : [];
 $images = $ui['background'] ?? [];
 $background_id = $images ? (int) $images[array_rand($images)] : 0;
 $background_url = $background_id > 0 ? (string) wp_get_attachment_image_url($background_id, 'full') : '';
 $theme_mode = (string) ($ui['theme_mode'] ?? 'no');
 $position = (string) ($ui['card_position'] ?? 'right');
-$aksrt_auth_context = [
+$jio_auth_context = [
 	'surface'     => 'page',
 	'tab'         => $tab,
 	'show_logo'   => !empty($ui['show_logo']),
@@ -52,13 +52,13 @@ $aksrt_auth_context = [
 	<meta charset="<?php bloginfo('charset'); ?>">
 	<meta name="viewport" content="width=device-width,initial-scale=1">
 	<meta name="robots" content="noindex,nofollow">
-	<title><?php echo esc_html__('登录 / 注册', 'aksrt') . ' - ' . esc_html(get_bloginfo('name')); ?></title>
+	<title><?php echo esc_html__('登录 / 注册', 'jio') . ' - ' . esc_html(get_bloginfo('name')); ?></title>
 	<?php wp_head(); ?>
 </head>
 <body <?php body_class('page-template-user-sign ' . ($theme_mode !== 'no' ? $theme_mode : '')); ?>>
 	<?php wp_body_open(); ?>
 	<?php if ($background_url !== '') : ?><div class="sign-page-background" style="background-image:url('<?php echo esc_url($background_url); ?>')"></div><?php endif; ?>
-	<?php if (!empty($ui['show_header']) && !$interim) : ?><header class="sign-topbar"><a href="<?php echo esc_url(home_url('/')); ?>"><?php echo esc_html(get_bloginfo('name')); ?></a><a href="<?php echo esc_url(home_url('/')); ?>"><?php esc_html_e('返回首页', 'aksrt'); ?></a></header><?php endif; ?>
+	<?php if (!empty($ui['show_header']) && !$interim) : ?><header class="sign-topbar"><a href="<?php echo esc_url(home_url('/')); ?>"><?php echo esc_html(get_bloginfo('name')); ?></a><a href="<?php echo esc_url(home_url('/')); ?>"><?php esc_html_e('返回首页', 'jio'); ?></a></header><?php endif; ?>
 	<main class="sign-page sign-card-position-<?php echo esc_attr($position); ?>">
 		<div class="sign-page-card">
 			<?php require get_template_directory() . '/templates/parts/auth-content.php'; ?>