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>

inc/helpers/comments/icons.php

@@ -6,12 +6,12 @@
  * definitions are injected by assets/js/runtime/svg-icon.js, which the
  * vendor runtime lazy-loads on every page (main.js: tbquire(['svg-icon'])).
  *
- * @package AKSRT
+ * @package Jio
  */
 
 defined('ABSPATH') || exit;
 
-if (!function_exists('aksrt_get_comment_icon')) :
+if (!function_exists('jio_get_comment_icon')) :
 	/**
 	 * Sprite-referenced SVG icon (legacy: zib_get_svg).
 	 *
@@ -19,7 +19,7 @@ if (!function_exists('aksrt_get_comment_icon')) :
 	 * @param string $class Classes for the svg element.
 	 * @return string
 	 */
-	function aksrt_get_comment_icon(string $name, string $class = 'icon'): string {
-		return aksrt_icon_markup('zibsvg-' . $name, $class);
+	function jio_get_comment_icon(string $name, string $class = 'icon'): string {
+		return jio_icon_markup('zibsvg-' . $name, $class);
 	}
 endif;