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/theme.js

@@ -1,10 +1,10 @@
 /**
- * AKSRT Theme Toggle — dark/light mode switching with transitions
+ * Jio Theme Toggle — dark/light mode switching with transitions
  */
 (function () {
   "use strict";
 
-  var THEME_KEY = "aksrt-theme";
+  var THEME_KEY = "jio-theme";
   var THEME_COOKIE_KEY = "theme_mode";
 
   function normalizeStoredTheme(value) {
@@ -103,29 +103,29 @@
   function syncThemeImages(isDark) {
     document.querySelectorAll("img[switch-src], img[data-switch-src]").forEach(function (img) {
       var darkSrc = getThemeImageAttr(img, "switch-src");
-      if (!img.dataset.aksrtThemeLightSrc) {
-        img.dataset.aksrtThemeLightSrc = img.getAttribute("src") || "";
+      if (!img.dataset.jioThemeLightSrc) {
+        img.dataset.jioThemeLightSrc = img.getAttribute("src") || "";
       }
-      setThemeImageSource(img, isDark && darkSrc ? darkSrc : img.dataset.aksrtThemeLightSrc);
+      setThemeImageSource(img, isDark && darkSrc ? darkSrc : img.dataset.jioThemeLightSrc);
     });
 
     document.querySelectorAll("img[white-src], img[dark-src], img[data-white-src], img[data-dark-src]").forEach(function (img) {
-      var lightSrc = getThemeImageAttr(img, "white-src") || img.dataset.aksrtThemeLightSrc || img.getAttribute("src") || "";
+      var lightSrc = getThemeImageAttr(img, "white-src") || img.dataset.jioThemeLightSrc || img.getAttribute("src") || "";
       var darkSrc = getThemeImageAttr(img, "dark-src");
-      if (!img.dataset.aksrtThemeLightSrc && lightSrc) {
-        img.dataset.aksrtThemeLightSrc = lightSrc;
+      if (!img.dataset.jioThemeLightSrc && lightSrc) {
+        img.dataset.jioThemeLightSrc = lightSrc;
       }
       setThemeImageSource(img, isDark && darkSrc ? darkSrc : lightSrc);
     });
   }
 
   function syncCodeHighlightTheme(isDark) {
-    if (typeof window.AksrtPrecodeApplyTheme === "function") {
-      window.AksrtPrecodeApplyTheme(isDark);
+    if (typeof window.JioPrecodeApplyTheme === "function") {
+      window.JioPrecodeApplyTheme(isDark);
       return;
     }
 
-    var settings = (window.aksrtData && window.aksrtData.codeHighlight) || {};
+    var settings = (window.jioData && window.jioData.codeHighlight) || {};
     var theme = isDark ? (settings.darkTheme || "monokai") : (settings.lightTheme || "enlighter");
     document.querySelectorAll(".enlighter-default").forEach(function (el) {
       el.className = el.className.replace(/\benlighter-t-[\w-]+\b/g, "").replace(/\s+/g, " ").trim();
@@ -135,7 +135,7 @@
 
   function dispatchThemeChange(isDark) {
     try {
-      document.dispatchEvent(new CustomEvent("aksrt:theme-change", {
+      document.dispatchEvent(new CustomEvent("jio:theme-change", {
         detail: {
           theme: isDark ? "dark" : "light",
           isDark: isDark
@@ -185,7 +185,7 @@
     themeInitialized = true;
 
     var stored = getStoredTheme();
-    var configuredMode = (window.aksrtData && window.aksrtData.themeMode) || "light";
+    var configuredMode = (window.jioData && window.jioData.themeMode) || "light";
     if (stored === "dark" || stored === "light") {
       applyTheme(stored);
     } else {