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>

assets/js/admin-ai-seo.js

@@ -1,23 +1,23 @@
 /**
- * AKSRT Admin AI SEO — SEO generate + summary → excerpt
+ * Jio Admin AI SEO — SEO generate + summary → excerpt
  */
 (function () {
   'use strict';
 
-  if (!window.aksrtAiSeo) return;
+  if (!window.jioAiSeo) return;
 
-  var CFG = window.aksrtAiSeo;
-  var REST = (CFG.restUrl || '/wp-json/aksrt/v1').replace(/\/$/, '');
+  var CFG = window.jioAiSeo;
+  var REST = (CFG.restUrl || '/wp-json/jio/v1').replace(/\/$/, '');
   var NONCE = CFG.nonce || '';
   var I18N = CFG.i18n || {};
 
   function notify($btn, msg, type) {
-    var wrap = $btn.closest('.aksrt-seo-meta-box, td, .form-field, p, .aksrt-ai-summary-row') || $btn.parentNode;
+    var wrap = $btn.closest('.jio-seo-meta-box, td, .form-field, p, .jio-ai-summary-row') || $btn.parentNode;
     if (!wrap) return;
-    var old = wrap.querySelector('.aksrt-ai-seo-msg');
+    var old = wrap.querySelector('.jio-ai-seo-msg');
     if (old) old.remove();
     var el = document.createElement('span');
-    el.className = 'aksrt-ai-seo-msg ' + (type === 'error' ? 'is-error' : 'is-ok');
+    el.className = 'jio-ai-seo-msg ' + (type === 'error' ? 'is-error' : 'is-ok');
     el.textContent = msg;
     wrap.appendChild(el);
     setTimeout(function () {
@@ -27,9 +27,9 @@
 
   function fillPost(data) {
     var map = {
-      title: 'aksrt_seo_title',
-      keywords: 'aksrt_seo_keywords',
-      description: 'aksrt_seo_description',
+      title: 'jio_seo_title',
+      keywords: 'jio_seo_keywords',
+      description: 'jio_seo_description',
     };
     Object.keys(map).forEach(function (key) {
       var field = data[key] || {};
@@ -41,9 +41,9 @@
 
   function fillTerm(data) {
     var map = {
-      title: '.aksrt-term-seo-title, #aksrt_seo_title',
-      keywords: '.aksrt-term-seo-keywords, #aksrt_seo_keywords',
-      description: '.aksrt-term-seo-description, #aksrt_seo_description',
+      title: '.jio-term-seo-title, #jio_seo_title',
+      keywords: '.jio-term-seo-keywords, #jio_seo_keywords',
+      description: '.jio-term-seo-description, #jio_seo_description',
     };
     Object.keys(map).forEach(function (key) {
       var field = data[key] || {};
@@ -156,7 +156,7 @@
 
   document.addEventListener('click', function (e) {
     // SEO generate
-    var seoBtn = e.target.closest('.aksrt-ai-seo-generate');
+    var seoBtn = e.target.closest('.jio-ai-seo-generate');
     if (seoBtn) {
       e.preventDefault();
       if (seoBtn.classList.contains('is-loading') || seoBtn.disabled) return;
@@ -214,7 +214,7 @@
     }
 
     // Summary → excerpt
-    var sumBtn = e.target.closest('.aksrt-ai-summary-generate');
+    var sumBtn = e.target.closest('.jio-ai-summary-generate');
     if (!sumBtn) return;
     e.preventDefault();
     if (sumBtn.classList.contains('is-loading') || sumBtn.disabled) return;