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/runtime-assets-behavior-harness.php

@@ -3,10 +3,10 @@
 declare(strict_types=1);
 
 define('ABSPATH', __DIR__ . DIRECTORY_SEPARATOR);
-define('AKSRT_VERSION', 'theme-fallback');
-define('AKSRT_URI', 'https://example.test/theme');
+define('JIO_VERSION', 'theme-fallback');
+define('JIO_URI', 'https://example.test/theme');
 
-$GLOBALS['runtime_asset_fixture_root'] = sys_get_temp_dir() . DIRECTORY_SEPARATOR . 'aksrt-runtime-assets-' . bin2hex(random_bytes(6));
+$GLOBALS['runtime_asset_fixture_root'] = sys_get_temp_dir() . DIRECTORY_SEPARATOR . 'jio-runtime-assets-' . bin2hex(random_bytes(6));
 $GLOBALS['runtime_asset_localized'] = [];
 mkdir($GLOBALS['runtime_asset_fixture_root'] . '/assets/js/runtime', 0777, true);
 
@@ -36,17 +36,17 @@ function is_user_logged_in(): bool { return false; }
 function get_current_user_id(): int { return 0; }
 function wp_max_upload_size(): int { return 1048576; }
 function is_page_template(string $template = ''): bool { return false; }
-function aksrt_is_lazy(string $scope): bool { return false; }
-function aksrt_get_lazy_thumb(string $size = ''): string { return 'https://example.test/lazy.svg'; }
-function aksrt_get_default_avatar_url(): string { return 'https://example.test/avatar.png'; }
+function jio_is_lazy(string $scope): bool { return false; }
+function jio_get_lazy_thumb(string $size = ''): string { return 'https://example.test/lazy.svg'; }
+function jio_get_default_avatar_url(): string { return 'https://example.test/avatar.png'; }
 
 require dirname(__DIR__, 2) . '/src/Core/ScriptsPart1c.php';
 
 class RuntimeAssetBehaviorHarness {
-	use \AKSRT\Core\ScriptsPart1c;
+	use \Jio\Core\ScriptsPart1c;
 
 	public function enqueue(): void {
-		$this->enqueue_public_fonts_js_and_data('https://example.test/theme', 'aksrt-public', [], false, false, false, false, AKSRT_VERSION, []);
+		$this->enqueue_public_fonts_js_and_data('https://example.test/theme', 'jio-public', [], false, false, false, false, JIO_VERSION, []);
 	}
 
 	private function resolve_frontend_routes(): array {
@@ -93,5 +93,5 @@ rmdir(get_template_directory());
 
 echo json_encode([
 	'versions' => $versions,
-	'expected' => [(string) ($baseTime + 30), (string) ($baseTime + 40), (string) ($baseTime + 50), AKSRT_VERSION],
+	'expected' => [(string) ($baseTime + 30), (string) ($baseTime + 40), (string) ($baseTime + 50), JIO_VERSION],
 ], JSON_THROW_ON_ERROR);