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/widget-system/vip-points-entry-harness.php

@@ -12,11 +12,11 @@ namespace {
     function esc_attr__($value, string $domain = ''): string { return htmlspecialchars((string) $value, ENT_QUOTES, 'UTF-8'); }
     function esc_url($value): string { return (string) $value; }
     function wp_kses_post($value): string { return (string) $value; }
-    function aksrt_get_user_center_tab_url(string $tab): string { return '/user/' . $tab; }
+    function jio_get_user_center_tab_url(string $tab): string { return '/user/' . $tab; }
     function add_action(string $hook, callable $cb, int $p = 10, int $a = 1): void {}
 }
 
-namespace AKSRT\Content {
+namespace Jio\Content {
     // VipService 门面：get_catalog 由探测值驱动（含 currency_name + 可兑换套餐）。
     final class VipService {
         public static function get_instance(): self { return new self(); }
@@ -24,7 +24,7 @@ namespace AKSRT\Content {
         /** @return array<string,mixed> */
         public function get_catalog(int $user_id = 0): array {
             return [
-                'currency_name' => $GLOBALS['aksrt_probe_currency'] ?? '积分',
+                'currency_name' => $GLOBALS['jio_probe_currency'] ?? '积分',
                 'points_exchange' => [
                     'enabled' => true,
                     'packages' => [['package_id' => 6001, 'level' => 1, 'points' => 500]],
@@ -34,24 +34,24 @@ namespace AKSRT\Content {
     }
 }
 
-namespace AKSRT\Settings {
+namespace Jio\Settings {
     final class Settings {
         // 仅在 catalog 未带 currency_name 时回退，用于验证兜底路径。
-        public static function get_currency_name(): string { return $GLOBALS['aksrt_probe_fallback'] ?? '积分'; }
+        public static function get_currency_name(): string { return $GLOBALS['jio_probe_fallback'] ?? '积分'; }
     }
 }
 
 namespace {
-    require dirname(__DIR__, 2) . '/inc/helpers/aksrt-vip.php';
+    require dirname(__DIR__, 2) . '/inc/helpers/jio-vip.php';
 
-    $GLOBALS['aksrt_probe_currency'] = isset($argv[1]) ? (string) $argv[1] : '书币';
-    $GLOBALS['aksrt_probe_fallback'] = isset($argv[2]) ? (string) $argv[2] : '回退币';
+    $GLOBALS['jio_probe_currency'] = isset($argv[1]) ? (string) $argv[1] : '书币';
+    $GLOBALS['jio_probe_fallback'] = isset($argv[2]) ? (string) $argv[2] : '回退币';
 
     // 场景 1：后台改名后，横条标题跟随自定义货币名。
-    echo aksrt_get_vip_points_exchange_entry_html(1, 0), "\n";
+    echo jio_get_vip_points_exchange_entry_html(1, 0), "\n";
     // 场景 2：已是会员 → 不输出。
-    echo (aksrt_get_vip_points_exchange_entry_html(1, 2) === '' ? 'VIP_HIDDEN' : 'VIP_SHOWN'), "\n";
+    echo (jio_get_vip_points_exchange_entry_html(1, 2) === '' ? 'VIP_HIDDEN' : 'VIP_SHOWN'), "\n";
     // 场景 3：catalog 未带 currency_name → 回退到设置里的名称。
-    $GLOBALS['aksrt_probe_currency'] = '';
-    echo aksrt_get_vip_points_exchange_entry_html(1, 0), "\n";
+    $GLOBALS['jio_probe_currency'] = '';
+    echo jio_get_vip_points_exchange_entry_html(1, 0), "\n";
 }