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/effects.js

@@ -1,9 +1,9 @@
 /**
- * AKSRT Effects — count-up / countdown / marquee / 3D tilt / FPS detection
+ * Jio Effects — count-up / countdown / marquee / 3D tilt / FPS detection
  *
  * 全部渐进增强，尊重 prefers-reduced-motion。
  *
- * @package AKSRT
+ * @package Jio
  */
 
 (function () {
@@ -13,13 +13,13 @@
 
   /* ============================================================
    * 1. 数字递增 (count-up) — IntersectionObserver 触发
-   *    用法：<span data-aksrt-countup data-target="1234" data-duration="2000">0</span>
+   *    用法：<span data-jio-countup data-target="1234" data-duration="2000">0</span>
    * ============================================================ */
   function initCountUp() {
     if (reducedMotion) return;
     if (!('IntersectionObserver' in window)) return;
 
-    var els = document.querySelectorAll('[data-aksrt-countup]:not([data-aksrt-countup-init])');
+    var els = document.querySelectorAll('[data-jio-countup]:not([data-jio-countup-init])');
     if (!els.length) return;
 
     var observer = new IntersectionObserver(function (entries) {
@@ -55,17 +55,17 @@
     }, { threshold: 0.3 });
 
     els.forEach(function (el) {
-      el.dataset.aksrtCountupInit = '1';
+      el.dataset.jioCountupInit = '1';
       observer.observe(el);
     });
   }
 
   /* ============================================================
    * 2. 倒计时组件
-   *    用法：<span data-aksrt-countdown data-end="2026-12-31T23:59:59">--:--:--</span>
+   *    用法：<span data-jio-countdown data-end="2026-12-31T23:59:59">--:--:--</span>
    * ============================================================ */
   function initCountdown() {
-    var els = document.querySelectorAll('[data-aksrt-countdown]:not([data-aksrt-countdown-init])');
+    var els = document.querySelectorAll('[data-jio-countdown]:not([data-jio-countdown-init])');
     if (!els.length) return;
 
     function pad(n) { return n < 10 ? '0' + n : '' + n; }
@@ -93,7 +93,7 @@
     }
 
     els.forEach(function (el) {
-      el.dataset.aksrtCountdownInit = '1';
+      el.dataset.jioCountdownInit = '1';
       update(el);
       setInterval(function () { update(el); }, 1000);
     });
@@ -101,12 +101,12 @@
 
   /* ============================================================
    * 4. 3D 悬停倾斜 (vanilla tilt)
-   *    用法：<div data-aksrt-tilt data-tilt-max="15">...</div>
+   *    用法：<div data-jio-tilt data-tilt-max="15">...</div>
    * ============================================================ */
   function initTilt() {
     if (reducedMotion) return;
 
-    document.querySelectorAll('[data-aksrt-tilt]').forEach(function (el) {
+    document.querySelectorAll('[data-jio-tilt]').forEach(function (el) {
       if (el.dataset.tiltBound) return;
       el.dataset.tiltBound = '1';