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/pages/users/partials/ticket/TicketPrereplyPanel.vue

@@ -1,6 +1,6 @@
 <template>
-  <n-card class="aksrt-section-card">
-    <div class="aksrt-section-header">
+  <n-card class="jio-section-card">
+    <div class="jio-section-header">
       <h3>预设回复</h3>
       <n-space>
         <n-button size="small" :disabled="saving || !reorderable" :loading="savingOrder" @click="saveOrder">
@@ -21,17 +21,17 @@
       v-model="rows"
       v-bind="SORTABLE_LIST_ATTRS"
       item-key="id"
-      class="aksrt-sortable"
+      class="jio-sortable"
     >
       <template #item="{ element, index }">
-        <div class="aksrt-sortable__item">
-          <div class="aksrt-sortable__head">
-            <AksSortHandle />
-            <span class="aksrt-sortable__index">{{ index + 1 }}</span>
-            <div class="aksrt-sortable__main">
-              <span class="aksrt-ticket-prereply__content">{{ element.content }}</span>
+        <div class="jio-sortable__item">
+          <div class="jio-sortable__head">
+            <JioSortHandle />
+            <span class="jio-sortable__index">{{ index + 1 }}</span>
+            <div class="jio-sortable__main">
+              <span class="jio-ticket-prereply__content">{{ element.content }}</span>
             </div>
-            <div class="aksrt-sortable__actions">
+            <div class="jio-sortable__actions">
               <n-button size="tiny" type="primary" quaternary @click="openEdit(element)">编辑</n-button>
               <n-button size="tiny" type="error" quaternary @click="handleDelete(element)">删除</n-button>
             </div>
@@ -74,7 +74,7 @@ import { computed, onMounted, ref } from 'vue'
 import { NButton, NSpace, useDialog, useMessage } from 'naive-ui'
 import draggable from 'vuedraggable'
 import api from '@/api'
-import AksSortHandle from '@/components/form/AksSortHandle.vue'
+import JioSortHandle from '@/components/form/JioSortHandle.vue'
 import { SORTABLE_LIST_ATTRS } from '@/components/form/sortable-options.js'
 
 const message = useMessage()
@@ -193,8 +193,8 @@ defineExpose({ reload: load })
 </script>
 
 <style scoped>
-.aksrt-ticket-prereply__content {
-  color: var(--aksrt-color-text, #1F2923);
+.jio-ticket-prereply__content {
+  color: var(--jio-color-text, #1F2923);
   font-size: 13px;
   line-height: 1.6;
   white-space: pre-wrap;