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/ticket-captcha-contract.test.cjs

@@ -25,7 +25,7 @@ test('ticket captcha scenes are registered in all three places', () => {
   const adminSchema = read('assets/admin/src/schema/sections/permissions/index.js');
 
   for (const scene of SCENES) {
-    assert.match(captcha, new RegExp(`'${scene.key}'\\s*=> __\\('${scene.label}', 'aksrt'\\)`),
+    assert.match(captcha, new RegExp(`'${scene.key}'\\s*=> __\\('${scene.label}', 'jio'\\)`),
       `captcha scene ${scene.key} missing`);
     assert.ok(permissions.includes(`'label' => '${scene.label}', 'value' => '${scene.key}'`),
       `PHP permissions schema missing ${scene.key}`);
@@ -54,14 +54,14 @@ test('the ticket REST layer consumes both scenes exactly once', () => {
   assert.match(rest, /const CAPTCHA_SCENE_REPLY = 'ticket_reply';/);
   assert.equal((rest.match(/require_captcha\(\$request, self::CAPTCHA_SCENE_/g) || []).length, 2,
     'create and reply must each verify captcha exactly once');
-  assert.equal((rest.match(/aksrt_require_captcha\(/g) || []).length, 1,
+  assert.equal((rest.match(/jio_require_captcha\(/g) || []).length, 1,
     'captcha verification must funnel through one helper');
 });
 
 test('the ticket panel mounts both captcha scenes', () => {
   const renderer = read('inc/helpers/user-center-renderers/profile-tickets.php');
-  assert.ok(renderer.includes("aksrt_render_captcha('ticket_create')"), 'create mount missing');
-  assert.ok(renderer.includes("aksrt_render_captcha('ticket_reply')"), 'reply mount missing');
+  assert.ok(renderer.includes("jio_render_captcha('ticket_create')"), 'create mount missing');
+  assert.ok(renderer.includes("jio_render_captcha('ticket_reply')"), 'reply mount missing');
   assert.ok(!renderer.includes('after_sale'), 'renderer must not mount after-sale scenes');
 
   const js = read('assets/js/ticket-center.js');