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/admin/feature-settings-reference-contract.test.cjs

@@ -8,7 +8,7 @@
  *    imagelightbox / imagelightbox_type / imagelightbox_thumbs_s /
  *    imagelightbox_play_s / imagelightbox_zoom_s / imagelightbox_full_s /
  *    imagelightbox_down_s / post_like_s / post_default_mate(views/like)；
- * 3) 旧 AKSRT 私有/异名字段（feature_print / feature_pdf_export /
+ * 3) 旧 Jio 私有/异名字段（feature_print / feature_pdf_export /
  *    post_lightbox* / post_like_enabled / post_default_*_min/max）已彻底移除，
  *    文章页面(page)不再承载这些字段，无双路兼容；
  * 4) 运行时（PostDisplay::get_post_page_settings）只读取新键，灯箱复选框
@@ -27,10 +27,10 @@ const pageJs = fs.readFileSync(path.join(root, 'assets/admin/src/schema/sections
 const runtime = fs.readFileSync(path.join(root, 'src/Settings/PostDisplay.php'), 'utf8');
 const scripts1c = fs.readFileSync(path.join(root, 'src/Core/ScriptsPart1c.php'), 'utf8');
 const scripts1b = fs.readFileSync(path.join(root, 'src/Core/ScriptsPart1b.php'), 'utf8');
-const frontendTags = fs.readFileSync(path.join(root, 'inc/helpers/aksrt-frontend-tags.php'), 'utf8');
+const frontendTags = fs.readFileSync(path.join(root, 'inc/helpers/jio-frontend-tags.php'), 'utf8');
 const coreHooks = fs.readFileSync(path.join(root, 'inc/core-hooks.php'), 'utf8');
-const singleRender = fs.readFileSync(path.join(root, 'inc/helpers/aksrt-single-render.php'), 'utf8');
-const mobileHeader = fs.readFileSync(path.join(root, 'inc/helpers/header/aksrt-header-mobile.php'), 'utf8');
+const singleRender = fs.readFileSync(path.join(root, 'inc/helpers/jio-single-render.php'), 'utf8');
+const mobileHeader = fs.readFileSync(path.join(root, 'inc/helpers/header/jio-header-mobile.php'), 'utf8');
 
 const REFERENCE_KEYS = [
   'article_nav',
@@ -46,7 +46,7 @@ const REFERENCE_KEYS = [
   'post_default_mate',
 ];
 
-// 旧 AKSRT 私有 / 异名字段（打印与 PDF 导出、旧灯箱六开关、旧点赞与默认数值四键）。
+// 旧 Jio 私有 / 异名字段（打印与 PDF 导出、旧灯箱六开关、旧点赞与默认数值四键）。
 const LEGACY_KEYS = [
   'feature_print',
   'feature_pdf_export',
@@ -194,7 +194,7 @@ test('旧字段在 schema 与运行时中均已移除（无双路）', () => {
     assert.ok(!runtime.includes(legacy), `PostDisplay 残留旧字段: ${legacy}`);
     assert.ok(!js.includes(legacy), `feature.js 残留旧字段: ${legacy}`);
     assert.ok(!pageJs.includes(legacy), `page.js 残留旧字段: ${legacy}`);
-    assert.ok(!frontendTags.includes(legacy), `aksrt-frontend-tags 残留旧字段: ${legacy}`);
+    assert.ok(!frontendTags.includes(legacy), `jio-frontend-tags 残留旧字段: ${legacy}`);
   }
   assert.ok(!scripts1b.includes('needs_print'), 'ScriptsPart1b 残留 needs_print 分支');
   assert.ok(!scripts1c.includes('needs_print'), 'ScriptsPart1c 残留 needs_print 需求');
@@ -228,5 +228,5 @@ test('运行时只读取新键并接入灯箱/目录树/预置参数', () => {
   // 预置参数：新建文章随机填入。
   assert.match(coreHooks, /save_post/);
   assert.match(coreHooks, /POST_VIEW_COUNT_KEY/);
-  assert.match(coreHooks, /_aksrt_like_count/);
+  assert.match(coreHooks, /_jio_like_count/);
 });