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/comment-ajax.js

@@ -1,29 +1,29 @@
 /**
- * AKSRT Comment Actions client
+ * Jio Comment Actions client
  *
- * REST aksrt/v1: like / delete / moderate / pin.
+ * REST jio/v1: like / delete / moderate / pin.
  * Edit uses moveForm (#respond) via comment-move-form.js — not inline textarea.
  * Submit owned by assets/js/core/comments.js (single submit contract).
  *
- * Markup (aksrt_comment_callback, legacy DOM):
+ * Markup (jio_comment_callback, legacy DOM):
  *   li.comment#comment-{id}
  *     .comment-header .action-comment-like[data-comment-action=like] > count
  *     .comment-content#comment-content-{id}
  *     .comt-meta [data-comment-action=pin|approve|hold|delete]
  *
- * @package AKSRT
+ * @package Jio
  */
 
 (function () {
   'use strict';
 
-  if (!window.aksrtData) return;
+  if (!window.jioData) return;
 
   var COMMENT_SELECTOR = 'li.comment';
   var CONTENT_SELECTOR = '.comment-content';
 
-  var REST_BASE = (aksrtData.siteUrl || '').replace(/\/$/, '') + '/wp-json/aksrt/v1';
-  var REST_NONCE = aksrtData.restNonce || '';
+  var REST_BASE = (jioData.siteUrl || '').replace(/\/$/, '') + '/wp-json/jio/v1';
+  var REST_NONCE = jioData.restNonce || '';
 
   function restPost(endpoint, body) {
     return fetch(REST_BASE + endpoint, {
@@ -68,7 +68,7 @@
   });
 
   function formatCount(count) {
-    // 与 PHP aksrt_format_number() 同一套缩写：≥10000 → 1.2W+，≥1000 → 1.5K。
+    // 与 PHP jio_format_number() 同一套缩写：≥10000 → 1.2W+，≥1000 → 1.5K。
     var safeCount = Math.max(0, parseInt(count, 10) || 0);
     if (safeCount >= 10000) {
       return Math.round((safeCount / 10000) * 10) / 10 + 'W+';