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/tab-posts-runtime.test.cjs

@@ -113,7 +113,7 @@ function postsMarkup(document, unveiled = false) {
   pager.setAttribute('data-widget-items', '');
   pager.setAttribute('data-widget-lazy', '');
   pager.setAttribute('data-widget', 'posts');
-  pager.setAttribute('data-instance', 'aksrt_widget_posts-2');
+  pager.setAttribute('data-instance', 'jio_widget_posts-2');
   pager.setAttribute('data-page', '1');
   pager.setAttribute('aria-busy', 'true');
   pager.innerHTML = '<div class="post_ajax_loader is-loading"><div class="posts-item placeholder">Loading</div></div>';
@@ -121,7 +121,7 @@ function postsMarkup(document, unveiled = false) {
   return { root };
 }
 
-function createRuntime({ fetch, pages, posts = false, unveiled = false, restUrl = '/wp-json/aksrt/v1/widgets/', observe = false } = {}) {
+function createRuntime({ fetch, pages, posts = false, unveiled = false, restUrl = '/wp-json/jio/v1/widgets/', observe = false } = {}) {
   const document = new MiniDocument();
   const { root: widget, nav, tabOne, tabTwo } = posts ? postsMarkup(document, unveiled) : tabMarkup(document);
   document.body.appendChild(widget);
@@ -152,7 +152,7 @@ function createRuntime({ fetch, pages, posts = false, unveiled = false, restUrl
     observe() {}
   } : undefined;
   const window = {
-    aksrtWidgets: config,
+    jioWidgets: config,
     location: { href: 'https://example.test/' },
     matchMedia: () => ({ matches: false }),
     jQuery,
@@ -487,8 +487,8 @@ test('article widget waits for its own lazy reveal and fetches the first page on
   pager.dispatch('lazybeforeunveil');
   assert.deepEqual(pageRequests(runtime.requests), [1]);
   const url = new URL(runtime.requests[0]);
-  assert.equal(url.pathname, '/wp-json/aksrt/v1/widgets/posts/items');
-  assert.equal(url.searchParams.get('instance'), 'aksrt_widget_posts-2');
+  assert.equal(url.pathname, '/wp-json/jio/v1/widgets/posts/items');
+  assert.equal(url.searchParams.get('instance'), 'jio_widget_posts-2');
   transport.pending[0].resolve({ html: '<posts class="posts-item list ajax-item" data-post-id="first">First article</posts>', page: 1, paginate_html: '' });
   await tick();
   assert.ok(pager.querySelector('[data-post-id="first"]'));
@@ -526,11 +526,11 @@ test('article widget failure exposes a retry that replaces the initial skeleton'
 });
 
 test('article REST addresses preserve the route for plain WordPress permalinks', async () => {
-  const runtime = createRuntime({ posts: true, unveiled: true, restUrl: 'https://example.test/blog/?rest_route=/aksrt/v1/widgets/' });
+  const runtime = createRuntime({ posts: true, unveiled: true, restUrl: 'https://example.test/blog/?rest_route=/jio/v1/widgets/' });
   const url = new URL(runtime.requests[0]);
   assert.equal(url.pathname, '/blog/');
-  assert.equal(url.searchParams.get('rest_route'), '/aksrt/v1/widgets/posts/items');
-  assert.equal(url.searchParams.get('instance'), 'aksrt_widget_posts-2');
+  assert.equal(url.searchParams.get('rest_route'), '/jio/v1/widgets/posts/items');
+  assert.equal(url.searchParams.get('instance'), 'jio_widget_posts-2');
   assert.equal(url.searchParams.get('page'), '1');
   await tick();
   assert.equal(runtime.widget.querySelector('[data-widget-items]').dataset.loaded, '1');