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-index-card.php

@@ -5,7 +5,7 @@
  * Shows a card for a document page on the document navigation index.
  * Used in the document navigation page to list available documents.
  *
- * @package AKSRT
+ * @package Jio
  */
 
 defined('ABSPATH') || exit;
@@ -21,35 +21,35 @@ $child_count = count($children);
 $thumb = get_the_post_thumbnail_url($page_id, 'medium');
 $excerpt = wp_trim_words(get_the_excerpt(), 30, '...');
 ?>
-<a href="<?php the_permalink(); ?>" class="aksrt-doc-index-card">
+<a href="<?php the_permalink(); ?>" class="jio-doc-index-card">
     <?php if ($thumb) : ?>
-        <div class="aksrt-doc-index-card__thumb">
-            <img<?php echo aksrt_get_lazy_attr('lazy_other', (string) $thumb); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?> alt="">
+        <div class="jio-doc-index-card__thumb">
+            <img<?php echo jio_get_lazy_attr('lazy_other', (string) $thumb); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?> alt="">
         </div>
     <?php else : ?>
-        <div class="aksrt-doc-index-card__icon">
+        <div class="jio-doc-index-card__icon">
             <i class="fa fas fa-book"></i>
         </div>
     <?php endif; ?>
 
-    <div class="aksrt-doc-index-card__body">
-        <h3 class="aksrt-doc-index-card__title"><?php the_title(); ?></h3>
+    <div class="jio-doc-index-card__body">
+        <h3 class="jio-doc-index-card__title"><?php the_title(); ?></h3>
         <?php if ($excerpt) : ?>
-            <p class="aksrt-doc-index-card__desc"><?php echo esc_html($excerpt); ?></p>
+            <p class="jio-doc-index-card__desc"><?php echo esc_html($excerpt); ?></p>
         <?php endif; ?>
-        <div class="aksrt-doc-index-card__meta">
+        <div class="jio-doc-index-card__meta">
             <?php if ($child_count > 0) : ?>
-                <span class="aksrt-doc-index-card__count">
+                <span class="jio-doc-index-card__count">
                     <i class="fa fas fa-file-alt"></i>
-                    <?php printf(esc_html__('%d 篇文章', 'aksrt'), $child_count); ?>
+                    <?php printf(esc_html__('%d 篇文章', 'jio'), $child_count); ?>
                 </span>
             <?php endif; ?>
-            <span class="aksrt-doc-index-card__date">
+            <span class="jio-doc-index-card__date">
                 <i class="fa far fa-clock" aria-hidden="true"></i>
                 <?php echo esc_html(get_the_date('', $page_id)); ?>
             </span>
         </div>
     </div>
 
-    <i class="fa fas fa-chevron-right aksrt-doc-index-card__arrow"></i>
+    <i class="fa fas fa-chevron-right jio-doc-index-card__arrow"></i>
 </a>