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/pay-sdk-order-contract.test.cjs

@@ -3,7 +3,7 @@
  *
  * 背景：后台 收款接口 → 收款接口显示顺序 曾整列空白、保存后顺序被静默改写，
  * 且没有任何前台代码消费该配置。本契约锁定四件事：
- *   1) sortable 项使用 AksField 实际读取的 `label` 键（写 `title` 会渲染成空白）；
+ *   1) sortable 项使用 JioField 实际读取的 `label` 键（写 `title` 会渲染成空白）；
  *   2) 持久化必须保留用户提交的键顺序（键顺序即配置值本身）；
  *   3) 排序只保留一份实现，并且真的作用到收银台；
  *   4) 相关的重复实现 / 死模块不回潮。
@@ -18,9 +18,9 @@ const read = (...seg) => fs.readFileSync(path.join(root, ...seg), 'utf8');
 
 const schemaPhp = read('src', 'Admin', 'Schema', 'SchemaPayment.php');
 const schemaJs = read('assets', 'admin', 'src', 'schema', 'sections', 'payment', 'gateway.js');
-const aksField = read('assets', 'admin', 'src', 'components', 'form', 'AksField.vue');
+const aksField = read('assets', 'admin', 'src', 'components', 'form', 'JioField.vue');
 const provider = read('src', 'Admin', 'SchemaProvider.php');
-const pay = read('inc', 'helpers', 'aksrt-pay.php');
+const pay = read('inc', 'helpers', 'jio-pay.php');
 const gateway = read('src', 'Payment', 'Gateway.php');
 const wallet = read('inc', 'helpers', 'user-center-renderers', 'credits-wallet.php');
 const pointsRenderer = read('inc', 'helpers', 'user-center-renderers', 'credits-balance.php');
@@ -61,8 +61,8 @@ test('sortable 持久化保留提交键顺序', () => {
 });
 
 test('排序只有一份实现，无调用方的重复实现已移除', () => {
-  assert.match(pay, /if \(!function_exists\('aksrt_sort_payment_methods'\)\)/);
-  assert.match(pay, /function aksrt_sort_payment_methods\(array \$methods\): array/);
+  assert.match(pay, /if \(!function_exists\('jio_sort_payment_methods'\)\)/);
+  assert.match(pay, /function jio_sort_payment_methods\(array \$methods\): array/);
   assert.match(pay, /\$configured = is_array\(\$settings\) \? \(\$settings\['pay_sdk_order'\] \?\? \[\]\) : \[\];/);
   // 槽位映射与后台 sortable 项一一对应，易支付子通道随所属渠道槽位。
   assert.match(pay, /'wechat'\s+=> \['wechatpay', 'epay_wxpay'\]/);
@@ -77,19 +77,19 @@ test('排序只有一份实现，无调用方的重复实现已移除', () => {
 
 test('基础渠道列表与卡密渠道都经过同一排序实现', () => {
   // 内容收银台 / 会员购买 / 余额充值共用基础列表。
-  assert.match(pay, /return aksrt_sort_payment_methods\(\$methods\);/);
-  assert.match(balanceCharge, /aksrt_sort_payment_methods\(\$methods\)/);
-  assert.match(vipPackages, /aksrt_sort_payment_methods\(\$methods\)/);
+  assert.match(pay, /return jio_sort_payment_methods\(\$methods\);/);
+  assert.match(balanceCharge, /jio_sort_payment_methods\(\$methods\)/);
+  assert.match(vipPackages, /jio_sort_payment_methods\(\$methods\)/);
   // 购买积分弹窗自建余额 + 卡密列表，同样排序。
-  assert.match(pointsRenderer, /aksrt_sort_payment_methods\(\$points_methods\)/);
+  assert.match(pointsRenderer, /jio_sort_payment_methods\(\$points_methods\)/);
   // 卡密输入盒是 method 条件块，位置无关：卡密渠道可被移到任意槽位。
   assert.match(wallet, /in_array\('card_pass', array_column\(\$methods, 'id'\), true\)/);
 });
 
 test('会员弹窗不再保留重复的支付方式列表回退分支', () => {
-  assert.doesNotMatch(vipPackages, /class_exists\('\\\\AKSRT\\\\Payment\\\\Gateway'\)/);
+  assert.doesNotMatch(vipPackages, /class_exists\('\\\\Jio\\\\Payment\\\\Gateway'\)/);
   // 卡密渠道注入契约保持（对齐参考主题 zibpay_get_payment_methods）。
-  assert.match(vipPackages, /'id' => 'card_pass', 'name' => __\('卡密', 'aksrt'\)/);
+  assert.match(vipPackages, /'id' => 'card_pass', 'name' => __\('卡密', 'jio'\)/);
 });
 
 test('未被引用的后台 schema 默认值死模块不回潮', () => {