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/ajax-debug.js

@@ -1,12 +1,12 @@
 /**
- * AKSRT AJAX Debug — 排查 vendor main.min.js / legacy_ajax 产生的失败请求
+ * Jio AJAX Debug — 排查 vendor main.min.js / legacy_ajax 产生的失败请求
  *
- * 启用条件（见 inc/aksrt-ajax-debug.php）：WP_DEBUG 开启，或 URL 带 ?aksrt_ajax_debug=1
+ * 启用条件（见 inc/jio-ajax-debug.php）：WP_DEBUG 开启，或 URL 带 ?jio_ajax_debug=1
  *
  * 输出：
- * - [aksrt→ajax] 所有发往 admin-ajax.php 的 jQuery 请求（含 action 与参数）
- * - [aksrt✗ajax] 所有失败的 jQuery 请求（url / data / status / responseText）
- * - [aksrt✗fetch] 所有非 2xx 的 fetch 请求
+ * - [jio→ajax] 所有发往 admin-ajax.php 的 jQuery 请求（含 action 与参数）
+ * - [jio✗ajax] 所有失败的 jQuery 请求（url / data / status / responseText）
+ * - [jio✗fetch] 所有非 2xx 的 fetch 请求
  */
 (function () {
   'use strict';
@@ -29,27 +29,27 @@
     return data;
   }
 
-  console.log('%c[aksrt] ajax 调试已开启（?aksrt_ajax_debug=1 或 WP_DEBUG）', 'color:#2abd4e;background:#16171a;padding:2px 6px;');
+  console.log('%c[jio] ajax 调试已开启（?jio_ajax_debug=1 或 WP_DEBUG）', 'color:#2abd4e;background:#16171a;padding:2px 6px;');
 
   if (window.jQuery) {
     jQuery(document).ajaxSend(function (e, jqXHR, settings) {
       if (!settings || !settings.url || settings.url.indexOf('admin-ajax.php') === -1) return;
-      console.log('[aksrt→ajax]', settings.type || 'GET', settings.url, paramsToObject(settings.data));
+      console.log('[jio→ajax]', settings.type || 'GET', settings.url, paramsToObject(settings.data));
     });
 
     jQuery(document).ajaxError(function (e, jqXHR, settings, thrownError) {
-      console.warn('[aksrt✗ajax]', (settings && settings.type) || '?', (settings && settings.url) || '?',
+      console.warn('[jio✗ajax]', (settings && settings.type) || '?', (settings && settings.url) || '?',
         'data:', paramsToObject(settings && settings.data),
         'status:', jqXHR && jqXHR.status,
         'response:', clip(jqXHR && jqXHR.responseText),
         'thrown:', thrownError);
       // 定位触发元素：记录调用栈帮助回溯 legacy_ajax 调用来源
       if (settings && settings.url && settings.url.indexOf('admin-ajax.php') !== -1) {
-        console.warn('[aksrt✗ajax] 发出的 action 参数见上方 data —— 在 admin-ajax 无对应处理器时 WP 返回 400 "0"');
+        console.warn('[jio✗ajax] 发出的 action 参数见上方 data —— 在 admin-ajax 无对应处理器时 WP 返回 400 "0"');
       }
     });
   } else {
-    console.warn('[aksrt] jQuery 未加载，ajax 调试仅覆盖 fetch');
+    console.warn('[jio] jQuery 未加载，ajax 调试仅覆盖 fetch');
   }
 
   var rawFetch = window.fetch;
@@ -61,7 +61,7 @@
       return rawFetch.apply(this, args).then(function (res) {
         if (!res.ok) {
           res.clone().text().then(function (text) {
-            console.warn('[aksrt✗fetch]', res.status, url, 'body:', clip(body), 'response:', clip(text));
+            console.warn('[jio✗fetch]', res.status, url, 'body:', clip(body), 'response:', clip(text));
           }).catch(function () {});
         }
         return res;