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/split-upload-harness.php

@@ -6,7 +6,7 @@ declare(strict_types=1);
 namespace {
 	define('ABSPATH', __DIR__ . '/');
 	define('HOUR_IN_SECONDS', 3600);
-	define('WP_CONTENT_DIR', sys_get_temp_dir() . '/aksrt-split-test-' . getmypid());
+	define('WP_CONTENT_DIR', sys_get_temp_dir() . '/jio-split-test-' . getmypid());
 
 	function sanitize_file_name(string $name): string { return preg_replace('/[^A-Za-z0-9._\-]/', '', $name) ?? ''; }
 	function __(string $text, string $domain = ''): string { return $text; }
@@ -63,9 +63,9 @@ namespace {
 	require dirname(__DIR__, 2) . '/src/Core/FrontSubmitChunk.php';
 }
 
-namespace AKSRT\Core {
+namespace Jio\Core {
 	final class FakeFrontSubmit {
-		use \AKSRT\Core\FrontSubmitChunk;
+		use \Jio\Core\FrontSubmitChunk;
 
 		public static int $limit_bytes = 10 * 1048576;
 		public static array $persisted = [];
@@ -83,10 +83,10 @@ namespace AKSRT\Core {
 }
 
 namespace {
-	use AKSRT\Core\FakeFrontSubmit;
+	use Jio\Core\FakeFrontSubmit;
 
 	$submit = new FakeFrontSubmit();
-	$temp_dir = WP_CONTENT_DIR . '/aksrt-temp';
+	$temp_dir = WP_CONTENT_DIR . '/jio-temp';
 
 	// 1) Chunk parameter validation.
 	$err = $submit->rest_upload_chunk(new FakeRestRequest(['name' => '', 'chunks' => 3, 'chunk' => 0, 'size' => 10]));
@@ -124,12 +124,12 @@ namespace {
 
 	// 4) Merge refuses when a chunk is missing.
 	$err = $submit->rest_upload_chunk_merge(new FakeRestRequest(['kind' => 'video', 'name' => 'movie.mp4', 'chunks' => 3, 'size' => 9]));
-	split_upload_check($err instanceof \WP_Error && $err->get_error_code() === 'aksrt_chunk_missing', 'merge should refuse with missing chunks');
+	split_upload_check($err instanceof \WP_Error && $err->get_error_code() === 'jio_chunk_missing', 'merge should refuse with missing chunks');
 
 	// 5) Merge with a size mismatch is refused.
 	$submit->rest_upload_chunk(new FakeRestRequest($params(1, 3, 6), ['file' => ['tmp_name' => $make_file('BBB'), 'error' => 0]]));
 	$err = $submit->rest_upload_chunk_merge(new FakeRestRequest(['kind' => 'video', 'name' => 'movie.mp4', 'chunks' => 3, 'size' => 999]));
-	split_upload_check($err instanceof \WP_Error && $err->get_error_code() === 'aksrt_chunk_size_mismatch', 'size mismatch should refuse the merge');
+	split_upload_check($err instanceof \WP_Error && $err->get_error_code() === 'jio_chunk_size_mismatch', 'size mismatch should refuse the merge');
 
 	// 6) Happy-path merge concatenates in order, flags sideload, and cleans up.
 	$response = $submit->rest_upload_chunk_merge(new FakeRestRequest(['kind' => 'video', 'name' => 'movie.mp4', 'chunks' => 3, 'size' => 9]));
@@ -147,20 +147,20 @@ namespace {
 	// 8) Chunk size cap refuses oversized chunk blobs.
 	$big = $make_file(str_repeat('x', 3 * 1048576));
 	$err = $submit->rest_upload_chunk(new FakeRestRequest($params(0, 1, 3 * 1048576), ['file' => ['tmp_name' => $big, 'error' => 0]]));
-	split_upload_check($err instanceof \WP_Error && $err->get_error_code() === 'aksrt_chunk_invalid_size', 'oversized chunk blobs should be refused');
+	split_upload_check($err instanceof \WP_Error && $err->get_error_code() === 'jio_chunk_invalid_size', 'oversized chunk blobs should be refused');
 
 	// 9) Kind size limit caps cumulative uploads.
 	FakeFrontSubmit::$limit_bytes = 4;
 	$err = $submit->rest_upload_chunk(new FakeRestRequest($params(0, 2, 9), ['file' => ['tmp_name' => $make_file('AAAAA'), 'error' => 0]]));
-	split_upload_check($err instanceof \WP_Error && $err->get_error_code() === 'aksrt_upload_too_large', 'cumulative size over the kind limit should be refused');
+	split_upload_check($err instanceof \WP_Error && $err->get_error_code() === 'jio_upload_too_large', 'cumulative size over the kind limit should be refused');
 
 	// Cleanup.
 	FakeFrontSubmit::$persisted = [];
 	foreach ((array) glob(WP_CONTENT_DIR . '/*.part') as $leftover) {
 		@unlink((string) $leftover);
 	}
-	@unlink(WP_CONTENT_DIR . '/aksrt-temp/index.php');
-	@rmdir(WP_CONTENT_DIR . '/aksrt-temp');
+	@unlink(WP_CONTENT_DIR . '/jio-temp/index.php');
+	@rmdir(WP_CONTENT_DIR . '/jio-temp');
 	@rmdir(WP_CONTENT_DIR);
 
 	echo "Split upload harness passed\n";