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/pay-cashier.js

@@ -6,10 +6,10 @@
  * mode=form     auto-submit the server-built POST form
  * mode=jsapi    WeChat in-app WeixinJSBridge payment
  *
- * Polling stays with the caller (AksrtVipPurchaseCoordinator.poll); this module
+ * Polling stays with the caller (JioVipPurchaseCoordinator.poll); this module
  * only presents the payment step and reports when the QR modal is dismissed.
  *
- * @package AKSRT
+ * @package Jio
  */
 (function (window, document) {
   "use strict";
@@ -49,24 +49,24 @@
   /** Inner QR markup; reusable by callers that own their own modal. */
   function qrHtml(data) {
     var src = qrDataUrl(data.code_url);
-    var html = '<div class="aksrt-pay-cashier">';
+    var html = '<div class="jio-pay-cashier">';
     var amount = amountText(data);
-    if (amount) html += '<div class="aksrt-pay-cashier__amount">' + escapeHtml(amount) + "</div>";
+    if (amount) html += '<div class="jio-pay-cashier__amount">' + escapeHtml(amount) + "</div>";
     html += src
-      ? '<img class="aksrt-pay-cashier__qr" src="' + src + '" width="200" height="200" alt="支付二维码">'
-      : '<p class="aksrt-pay-cashier__error">二维码组件未加载，请刷新页面重试。</p>';
-    html += '<p class="aksrt-pay-cashier__tip">' + escapeHtml(data.message || "请使用手机扫码完成支付") + "</p>";
+      ? '<img class="jio-pay-cashier__qr" src="' + src + '" width="200" height="200" alt="支付二维码">'
+      : '<p class="jio-pay-cashier__error">二维码组件未加载，请刷新页面重试。</p>';
+    html += '<p class="jio-pay-cashier__tip">' + escapeHtml(data.message || "请使用手机扫码完成支付") + "</p>";
     if (data.payment_url && isMobile()) {
-      html += '<a class="but jb-blue aksrt-pay-cashier__open" href="' + escapeHtml(data.payment_url) + '">打开支付应用</a>';
+      html += '<a class="but jb-blue jio-pay-cashier__open" href="' + escapeHtml(data.payment_url) + '">打开支付应用</a>';
     }
     if (data.order_number) {
-      html += '<p class="aksrt-pay-cashier__order muted-2-color em09">订单号：' + escapeHtml(data.order_number) + "</p>";
+      html += '<p class="jio-pay-cashier__order muted-2-color em09">订单号：' + escapeHtml(data.order_number) + "</p>";
     }
     return html + "</div>";
   }
 
   function openQr(data, options) {
-    var runtime = window.AksrtModalRuntime;
+    var runtime = window.JioModalRuntime;
     if (!runtime) return false;
     var id = String(++sequence);
     if (typeof options.onClose === "function") listeners[id] = options.onClose;
@@ -74,7 +74,7 @@
       kind: KIND,
       cashierId: id,
       title: options.title || "扫码支付",
-      className: "aksrt-pay-cashier-modal",
+      className: "jio-pay-cashier-modal",
       telemetry: false,
       html: qrHtml(data),
     });
@@ -138,12 +138,12 @@
 
   /** Close the cashier QR modal after a terminal poll result. */
   function close() {
-    var runtime = window.AksrtModalRuntime;
+    var runtime = window.JioModalRuntime;
     var shell = runtime ? runtime.getActive() : null;
-    if (shell && shell.classList.contains("aksrt-pay-cashier-modal")) runtime.close("paid");
+    if (shell && shell.classList.contains("jio-pay-cashier-modal")) runtime.close("paid");
   }
 
-  document.addEventListener("aksrt:modal:close", function (event) {
+  document.addEventListener("jio:modal:close", function (event) {
     var detail = event && event.detail ? event.detail : {};
     var opts = detail.session && detail.session.options ? detail.session.options : {};
     if (opts.kind !== KIND || !listeners[opts.cashierId]) return;
@@ -152,7 +152,7 @@
     if (detail.reason !== "paid") fn(detail.reason || "close");
   });
 
-  window.AksrtPayCashier = {
+  window.JioPayCashier = {
     KIND: KIND,
     handle: handle,
     close: close,