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>

tests/dev/verify-ban-settings-defaults.php

@@ -28,7 +28,7 @@ function get_current_user_id() { return 1; }
 function is_user_logged_in() { return true; }
 function wp_unslash($value) { return $value; }
 function current_time($type) { return date('Y-m-d H:i:s'); }
-function get_theme_file_uri($file = '') { return 'https://example.test/wp-content/themes/aksrt/' . ltrim((string) $file, '/'); }
+function get_theme_file_uri($file = '') { return 'https://example.test/wp-content/themes/jio/' . ltrim((string) $file, '/'); }
 function get_theme_file_path($file = '') { return dirname(__DIR__, 2) . '/' . ltrim((string) $file, '/'); }
 function get_template_directory() { return dirname(__DIR__, 2); }
 function esc_url_raw($url) { return (string) $url; }
@@ -51,8 +51,8 @@ require $repo . '/src/Admin/SchemaProvider.php';
 require $repo . '/src/Settings/Settings.php';
 require $repo . '/src/Settings/UserRuntime.php';
 
-$reasons = \AKSRT\Settings\UserRuntime::ban_settings()['reasons'] ?? null;
-$report  = \AKSRT\Settings\UserRuntime::report_settings();
+$reasons = \Jio\Settings\UserRuntime::ban_settings()['reasons'] ?? null;
+$report  = \Jio\Settings\UserRuntime::report_settings();
 
 echo "=== ban_settings()['reasons'] (empty option) ===\n";
 var_export($reasons);
@@ -64,14 +64,14 @@ var_export([
 ]);
 
 // 再模拟“后台保存过自定义原因”的场景
-$GLOBALS['__test_options']['aksrt_settings'] = [
+$GLOBALS['__test_options']['jio_settings'] = [
     'ban_preset_reason' => [
         ['t' => '自定义原因A'],
         ['t' => '自定义原因B'],
     ],
 ];
-\AKSRT\Settings\Settings::flush_settings_cache();
-$stored = \AKSRT\Settings\UserRuntime::ban_settings()['reasons'] ?? null;
+\Jio\Settings\Settings::flush_settings_cache();
+$stored = \Jio\Settings\UserRuntime::ban_settings()['reasons'] ?? null;
 echo "\n\n=== ban_settings()['reasons'] (custom stored) ===\n";
 var_export($stored);
 echo "\n";