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/input-expand.js

@@ -1,5 +1,5 @@
 /**
- * AKSRT Input Expand
+ * Jio Input Expand
  *
  * Lightweight input field enhancements:
  * - Textarea auto-resize on input
@@ -9,36 +9,36 @@
  * No external dependencies — pure vanilla JS.
  *
  * Usage:
- *   <textarea data-aksrt-autoresize></textarea>
- *   <input data-aksrt-counter data-aksrt-maxlength="200">
- *   <input data-aksrt-validate data-aksrt-minlength="3" required>
+ *   <textarea data-jio-autoresize></textarea>
+ *   <input data-jio-counter data-jio-maxlength="200">
+ *   <input data-jio-validate data-jio-minlength="3" required>
  *
- * @package AKSRT
+ * @package Jio
  */
 
 (function () {
   'use strict';
 
-  var STYLE_ID = 'aksrt-input-expand-style';
+  var STYLE_ID = 'jio-input-expand-style';
 
   function injectStyle() {
     if (document.getElementById(STYLE_ID)) return;
     var style = document.createElement('style');
     style.id = STYLE_ID;
     style.textContent =
-      '.aksrt-counter{display:block;text-align:right;font-size:12px;color:#8a909c;margin-top:4px;transition:color 0.2s;}' +
-      '.aksrt-counter.is-over{color:#e74c3c;}' +
-      '.aksrt-counter.is-warn{color:#f39c12;}' +
-      '.aksrt-validate-msg{display:block;font-size:12px;margin-top:4px;color:#e74c3c;opacity:0;max-height:0;overflow:hidden;transition:all 0.2s;}' +
-      '.aksrt-validate-msg.is-visible{opacity:1;max-height:30px;}' +
-      'textarea[data-aksrt-autoresize]{overflow:hidden;resize:none;}';
+      '.jio-counter{display:block;text-align:right;font-size:12px;color:#8a909c;margin-top:4px;transition:color 0.2s;}' +
+      '.jio-counter.is-over{color:#e74c3c;}' +
+      '.jio-counter.is-warn{color:#f39c12;}' +
+      '.jio-validate-msg{display:block;font-size:12px;margin-top:4px;color:#e74c3c;opacity:0;max-height:0;overflow:hidden;transition:all 0.2s;}' +
+      '.jio-validate-msg.is-visible{opacity:1;max-height:30px;}' +
+      'textarea[data-jio-autoresize]{overflow:hidden;resize:none;}';
     document.head.appendChild(style);
   }
 
   // ── Auto-resize Textarea ──
 
   function initAutoResize() {
-    var textareas = document.querySelectorAll('textarea[data-aksrt-autoresize]');
+    var textareas = document.querySelectorAll('textarea[data-jio-autoresize]');
     textareas.forEach(function (ta) {
       function resize() {
         ta.style.height = 'auto';
@@ -53,11 +53,11 @@
   // ── Character Counter ──
 
   function initCounters() {
-    var fields = document.querySelectorAll('[data-aksrt-counter]');
+    var fields = document.querySelectorAll('[data-jio-counter]');
     fields.forEach(function (field) {
-      var max = parseInt(field.getAttribute('data-aksrt-maxlength') || field.getAttribute('maxlength') || '0', 10);
+      var max = parseInt(field.getAttribute('data-jio-maxlength') || field.getAttribute('maxlength') || '0', 10);
       var counter = document.createElement('span');
-      counter.className = 'aksrt-counter';
+      counter.className = 'jio-counter';
       field.parentNode.insertBefore(counter, field.nextSibling);
 
       function update() {
@@ -80,14 +80,14 @@
   // ── Validation Feedback ──
 
   function initValidation() {
-    var fields = document.querySelectorAll('[data-aksrt-validate]');
+    var fields = document.querySelectorAll('[data-jio-validate]');
     fields.forEach(function (field) {
-      var minLen = parseInt(field.getAttribute('data-aksrt-minlength') || field.getAttribute('minlength') || '0', 10);
-      var maxLen = parseInt(field.getAttribute('data-aksrt-maxlength') || field.getAttribute('maxlength') || '0', 10);
+      var minLen = parseInt(field.getAttribute('data-jio-minlength') || field.getAttribute('minlength') || '0', 10);
+      var maxLen = parseInt(field.getAttribute('data-jio-maxlength') || field.getAttribute('maxlength') || '0', 10);
       var required = field.hasAttribute('required');
 
       var msg = document.createElement('span');
-      msg.className = 'aksrt-validate-msg';
+      msg.className = 'jio-validate-msg';
       field.parentNode.insertBefore(msg, field.nextSibling);
 
       function validate() {
@@ -122,5 +122,5 @@
     initValidation();
   }
 
-  jQuery(document).off('auto_fun.aksrt-input-expand').on('auto_fun.aksrt-input-expand', function () { init(document); });
+  jQuery(document).off('auto_fun.jio-input-expand').on('auto_fun.jio-input-expand', function () { init(document); });
 })();