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/SchemaPage.vue

@@ -1,6 +1,6 @@
 <template>
-  <div class="aksrt-schema-page">
-    <AksFormRenderer
+  <div class="jio-schema-page">
+    <JioFormRenderer
       :title="pageMeta.title"
       :description="pageMeta.description"
       :icon="pageMeta.icon"
@@ -24,7 +24,7 @@
           v-model:value="captchaProviderTab"
           type="segment"
           animated
-          class="aksrt-tabs aksrt-captcha-provider-tabs"
+          class="jio-tabs jio-captcha-provider-tabs"
         >
           <n-tab-pane
             v-for="provider in captchaProviders"
@@ -48,18 +48,18 @@
         #field-geoip_block_countries="{ value, setValue }"
       >
         <n-dynamic-tags :value="Array.isArray(value) ? value : []" @update:value="setValue" />
-        <p class="aksrt-schema-page__field-hint">使用 ISO 国家代码，如 CN / US / RU。</p>
+        <p class="jio-schema-page__field-hint">使用 ISO 国家代码，如 CN / US / RU。</p>
       </template>
 
       <!-- Slot for custom group content (override per page if needed) -->
       <template v-for="(_, name) in $slots" #[name]="slotData">
         <slot :name="name" v-bind="slotData" />
       </template>
-    </AksFormRenderer>
+    </JioFormRenderer>
 
     <div
       v-if="isPermissionsLogin && !loading"
-      class="aksrt-schema-page__tool-actions"
+      class="jio-schema-page__tool-actions"
     >
       <n-button
         :disabled="!formData?.enabled || !formData?.active_provider"
@@ -80,7 +80,7 @@
             <n-spin />
             <p style="margin-top:10px;color:#999;">加载中...</p>
           </div>
-          <div v-if="testResult && !testLoading" :style="{color: testResult.success ? 'var(--aksrt-color-primary)' : '#d03050', textAlign:'center', padding:'20px'}">
+          <div v-if="testResult && !testLoading" :style="{color: testResult.success ? 'var(--jio-color-primary)' : '#d03050', textAlign:'center', padding:'20px'}">
             <p style="font-size:16px;margin:0;">{{ testResult.message }}</p>
           </div>
           <div v-if="!testLoading && !testResult" id="captcha-test-box" style="min-height:150px;"></div>
@@ -95,7 +95,7 @@
  * SchemaPage — generic Schema-driven settings page.
  *
  * Reads the schema from the Vue-side schema registry, fetches/saves settings
- * via the API client, and renders using AksFormRenderer.
+ * via the API client, and renders using JioFormRenderer.
  *
  * Usage (in router or parent):
  *   <SchemaPage domain="global" section="logo" />
@@ -106,7 +106,7 @@
 import { computed, watch, ref, nextTick, onBeforeUnmount } from 'vue'
 import { useRoute } from 'vue-router'
 import { useMessage } from 'naive-ui'
-import AksFormRenderer from '@/components/form/AksFormRenderer.vue'
+import JioFormRenderer from '@/components/form/JioFormRenderer.vue'
 import { useSectionForm } from '@/composables/useSectionForm'
 import { getSchema, normalizeSchemaDomain } from '@/schema/index.js'
 import api from '@/api/index.js'
@@ -221,7 +221,7 @@ const {
     const payload = { ...data }
     const clearSecrets = []
     Object.keys(payload).forEach((key) => {
-      if (payload[key] === '__AKSRT_CLEAR_SECRET__') {
+      if (payload[key] === '__JIO_CLEAR_SECRET__') {
         clearSecrets.push(key)
         delete payload[key]
       }
@@ -417,7 +417,7 @@ function loadProviderSDK(provider, cfg) {
             sitekey: cfg.site_key,
             theme: cfg.theme || 'auto',
             size: cfg.size || 'normal',
-            action: 'aksrt-admin-test',
+            action: 'jio-admin-test',
             cdata: 'admin-captcha-test',
             callback: function(token) {
               submitCaptchaTest('cloudflare', { cf_turnstile_response: token })
@@ -539,21 +539,21 @@ onBeforeUnmount(() => {
 </script>
 
 <style scoped>
-.aksrt-schema-page {
+.jio-schema-page {
   max-width: none;
   margin: 0;
 }
 
-.aksrt-schema-page__tool-actions {
+.jio-schema-page__tool-actions {
   display: flex;
   justify-content: flex-end;
   margin-top: 16px;
 }
 
-.aksrt-schema-page__field-hint {
+.jio-schema-page__field-hint {
   margin: 8px 0 0;
   font-size: 12px;
-  color: var(--aksrt-color-muted);
+  color: var(--jio-color-muted);
 }
 
 .captcha-test-overlay {