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/core/modal-cache.js

@@ -2,7 +2,7 @@
  * User-scoped in-memory modal cache with short TTLs and request deduplication.
  * Private modal payloads are never persisted to browser storage.
  *
- * @package AKSRT
+ * @package Jio
  */
 (function (window, document) {
   "use strict";
@@ -13,7 +13,7 @@
   var lastScope = "";
 
   function scope() {
-    var config = window.aksrtData || window.aksrt || {};
+    var config = window.jioData || window.jio || {};
     var userId = parseInt(config.userId || 0, 10) || 0;
     var current = (config.isLoggedIn && userId > 0 ? "user:" + userId : "guest") + ":v1";
     if (lastScope && lastScope !== current) clear();
@@ -74,7 +74,7 @@
       }
     });
     // 广播失效标签，供页面常驻视图（如待支付浮窗）按标签自行刷新。
-    document.dispatchEvent(new CustomEvent("aksrt:cache:invalidated", { detail: { tags: wanted.slice() } }));
+    document.dispatchEvent(new CustomEvent("jio:cache:invalidated", { detail: { tags: wanted.slice() } }));
     return removed;
   }
 
@@ -141,11 +141,11 @@
     };
   }
 
-  ["aksrt:auth:logout", "aksrt:account-switch", "aksrt:logout", "aksrt:user:logout", "aksrt:auth:changed", "wp_logout"].forEach(function (eventName) {
+  ["jio:auth:logout", "jio:account-switch", "jio:logout", "jio:user:logout", "jio:auth:changed", "wp_logout"].forEach(function (eventName) {
     document.addEventListener(eventName, clear);
   });
 
-  window.AksrtModalCache = {
+  window.JioModalCache = {
     get: function (key) { return read(key); },
     set: set,
     acquire: acquire,