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>

assets/css/routes/user-center/credits.css

@@ -166,7 +166,7 @@
    显式隐藏，main.css 的 .flex{display:flex}（后加载、与 bootstrap 的
    .modal{display:none} 同特异性）会让弹窗永久 display:flex 铺满全屏，
    叠加 .fade 的 opacity:0 形成隐形遮罩，拦截整页点击。 */
-.modal[data-aksrt-charge-modal] {
+.modal[data-jio-charge-modal] {
   display: none;
 }
 /* 打开态必须是 flex（而非 bootstrap 的内联 display:block）：无头 Chrome
@@ -175,7 +175,7 @@
    （align-items:center;justify-content:center）双轴居中——Zibll 生产环境
    即此形态（其 jQuery .show() 对 computed≠none 的壳是空操作，内联
    display 从未写入）。 */
-.modal[data-aksrt-charge-modal].in {
+.modal[data-jio-charge-modal].in {
   display: flex;
 }
 
@@ -183,10 +183,10 @@
    静止态同样必须显式隐藏，否则 .flex 工具类会使其铺满全屏形成隐形遮罩，
    拦截整页点击（2026-09-18 实测回归）。打开态由 initPointsPay 的内联
    display:flex 驱动，关闭撤除内联样式后即回到隐藏规则。 */
-.modal[data-aksrt-points-pay-modal] {
+.modal[data-jio-points-pay-modal] {
   display: none;
 }
-.modal[data-aksrt-points-pay-modal].in {
+.modal[data-jio-points-pay-modal].in {
   display: flex;
 }
 
@@ -194,17 +194,17 @@
    静止态同样必须显式隐藏，否则 .flex 工具类会使其铺满全屏形成隐形遮罩，
    拦截整页点击。打开态由 initAffiliatePoster 的内联 display:flex 驱动，
    关闭撤除内联样式后即回到隐藏规则。 */
-.modal[data-aksrt-affiliate-poster-modal] {
+.modal[data-jio-affiliate-poster-modal] {
   display: none;
 }
-.modal[data-aksrt-affiliate-poster-modal].in {
+.modal[data-jio-affiliate-poster-modal].in {
   display: flex;
 }
 /* 海报弹窗的圆形按钮必须保持圆形。上面的 .uc-content .but.jb-blue 是
    (0,3,0) 且后加载，会盖掉 main.css 的 .poster-share .but.cir(0,2,0)，
    把蓝色下载钮从圆角 5em 压成 4px 方角；黄色关闭钮因为不在该规则内
    才幸免。这里按 (0,3,0) 同权重回位参考主题的 pill 形态。 */
-.modal[data-aksrt-affiliate-poster-modal] .but.cir {
+.modal[data-jio-affiliate-poster-modal] .but.cir {
   padding: 0;
   border-radius: 5em;
 }
@@ -644,7 +644,7 @@ body.uc-modal-open {
   padding: 22px;
   color: #fff;
 }
-.aksrt-vip-level-icon {
+.jio-vip-level-icon {
   display: inline-block;
   width: 1.4em;
   height: 1.4em;
@@ -652,7 +652,7 @@ body.uc-modal-open {
   vertical-align: middle;
 }
 
-.uc-vip-level-card .aksrt-vip-level-icon {
+.uc-vip-level-card .jio-vip-level-icon {
   width: auto;
   height: 1.3em;
 }
@@ -1219,7 +1219,7 @@ body.uc-modal-open {
   gap: 12px;
   align-items: stretch;
 }
-/* 档位卡继承自 .aksrt-panel 的 20px 底距会在卡片行与下方元素（积分兑换入口 /
+/* 档位卡继承自 .jio-panel 的 20px 底距会在卡片行与下方元素（积分兑换入口 /
    more 说明）之间叠加成 32px/35px 的过大间距；弹性容器内清零，行内间距由
    gap 负责，块间间距统一由各块自身 margin-top（12–16px 节奏）控制。 */
 .uc-vip-tab .uc-vip-level-cards .uc-vip-level-card {