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/admin/src/components/PageHeader.vue

@@ -1,15 +1,15 @@
 <template>
-  <header class="aksrt-page-header">
-    <div class="aksrt-page-header__main">
-      <h2 class="aksrt-page-header__title">{{ title }}</h2>
-      <p v-if="desc" class="aksrt-page-header__desc">
+  <header class="jio-page-header">
+    <div class="jio-page-header__main">
+      <h2 class="jio-page-header__title">{{ title }}</h2>
+      <p v-if="desc" class="jio-page-header__desc">
         <slot name="desc">{{ desc }}</slot>
       </p>
-      <div v-else-if="$slots.desc" class="aksrt-page-header__desc">
+      <div v-else-if="$slots.desc" class="jio-page-header__desc">
         <slot name="desc" />
       </div>
     </div>
-    <div v-if="$slots.actions" class="aksrt-page-header__actions">
+    <div v-if="$slots.actions" class="jio-page-header__actions">
       <slot name="actions" />
     </div>
   </header>
@@ -23,7 +23,7 @@ defineProps({
 </script>
 
 <style scoped>
-.aksrt-page-header {
+.jio-page-header {
   display: flex;
   align-items: flex-start;
   justify-content: space-between;
@@ -32,28 +32,28 @@ defineProps({
   flex-wrap: wrap;
 }
 
-.aksrt-page-header__main {
+.jio-page-header__main {
   flex: 1 1 auto;
   min-width: 0;
 }
 
-.aksrt-page-header__title {
+.jio-page-header__title {
   margin: 0 0 6px;
-  color: var(--aksrt-color-text);
+  color: var(--jio-color-text);
   font-size: 22px;
   font-weight: 700;
   letter-spacing: -0.02em;
   line-height: 1.3;
 }
 
-.aksrt-page-header__desc {
+.jio-page-header__desc {
   margin: 0;
-  color: var(--aksrt-color-muted);
+  color: var(--jio-color-muted);
   font-size: 13px;
   line-height: 1.65;
 }
 
-.aksrt-page-header__actions {
+.jio-page-header__actions {
   flex: 0 0 auto;
   display: flex;
   align-items: center;
@@ -61,20 +61,20 @@ defineProps({
 }
 
 @media (max-width: 768px) {
-  .aksrt-page-header {
+  .jio-page-header {
     margin-bottom: 14px;
     gap: 10px;
   }
 
-  .aksrt-page-header__title {
+  .jio-page-header__title {
     font-size: 18px;
   }
 
-  .aksrt-page-header__desc {
+  .jio-page-header__desc {
     font-size: 12px;
   }
 
-  .aksrt-page-header__actions {
+  .jio-page-header__actions {
     width: 100%;
   }
 }