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/frontend/enhancements/core-ui.css

@@ -1,14 +1,14 @@
 /**
- * AKSRT Enhancements — 全局 UI 增强
+ * Jio Enhancements — 全局 UI 增强
  *
  * 包含：悬停动效、暗色过渡、滚动感知
- * 所有选择器使用 aksrt- 前缀避免冲突
+ * 所有选择器使用 jio- 前缀避免冲突
  *
  * 骨架屏不在此文件：唯一契约是 .placeholder 块 + .post_ajax_loader 容器
- * （inc/helpers/posts-renderer/markup.php 的 aksrt_render_placeholder）。
+ * （inc/helpers/posts-renderer/markup.php 的 jio_render_placeholder）。
  */
 
-@keyframes aksrt-spin {
+@keyframes jio-spin {
     from { transform: rotate(0deg); }
     to { transform: rotate(360deg); }
 }
@@ -18,29 +18,29 @@
  * ============================================================ */
 
 /* 卡片放大 */
-.aksrt-hover-zoom {
+.jio-hover-zoom {
     transition: transform 0.3s ease;
 }
 
-.aksrt-hover-zoom:hover {
+.jio-hover-zoom:hover {
     transform: scale(1.02);
 }
 
 /* 卡片轻微放大 */
-.aksrt-hover-zoom-sm {
+.jio-hover-zoom-sm {
     transition: transform 0.3s ease;
 }
 
-.aksrt-hover-zoom-sm:hover {
+.jio-hover-zoom-sm:hover {
     transform: scale(1.02);
 }
 
 /* 悬停显示内容 */
-.aksrt-hover-show {
+.jio-hover-show {
     position: relative;
 }
 
-.aksrt-hover-show__content {
+.jio-hover-show__content {
     position: absolute;
     opacity: 0;
     visibility: hidden;
@@ -49,45 +49,45 @@
     z-index: 10;
 }
 
-.aksrt-hover-show:hover .aksrt-hover-show__content {
+.jio-hover-show:hover .jio-hover-show__content {
     opacity: 1;
     visibility: visible;
     transform: translateY(0);
 }
 
 /* 关闭按钮旋转 */
-.aksrt-ic-close {
+.jio-ic-close {
     transition: transform 0.3s;
     cursor: pointer;
 }
 
-.aksrt-ic-close:hover {
+.jio-ic-close:hover {
     transform: rotate(270deg);
 }
 
 /* 图片悬停缩放（缩略图容器） */
-.aksrt-hover-zoom-img img {
+.jio-hover-zoom-img img {
     transition: transform 0.3s ease;
 }
 
-.aksrt-hover-zoom-img:hover img {
+.jio-hover-zoom-img:hover img {
     transform: scale(1.02);
 }
 
-.aksrt-hover-zoom-img-sm img {
+.jio-hover-zoom-img-sm img {
     transition: transform 0.3s ease;
 }
 
-.aksrt-hover-zoom-img-sm:hover img {
+.jio-hover-zoom-img-sm:hover img {
     transform: scale(1.02);
 }
 
 /* 按钮悬停上浮 */
-.aksrt-hover-lift {
+.jio-hover-lift {
     transition: transform 0.2s ease, box-shadow 0.2s ease;
 }
 
-.aksrt-hover-lift:hover {
+.jio-hover-lift:hover {
     transform: none;
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
 }
@@ -122,11 +122,11 @@ body.dark-theme::view-transition-new(root) {
 /* backdrop-filter 不支持时的降级 */
 @supports not ((-webkit-backdrop-filter: blur(20px)) or (backdrop-filter: blur(20px))) {
     :root {
-        --aksrt-blur-bg: #ffffff;
+        --jio-blur-bg: #ffffff;
     }
 
     .dark {
-        --aksrt-blur-bg: var(--surface-1);
+        --jio-blur-bg: var(--surface-1);
     }
 
 }
@@ -136,37 +136,37 @@ body.dark-theme::view-transition-new(root) {
  * ============================================================ */
 
 /* 向下滚动时隐藏导航栏 */
-body.aksrt-scroll-down .site-nav.nav-scroll-hide {
+body.jio-scroll-down .site-nav.nav-scroll-hide {
     transform: translateY(-100%);
     transition: transform 0.3s ease;
 }
 
-body.aksrt-scroll-up .site-nav.nav-scroll-hide {
+body.jio-scroll-up .site-nav.nav-scroll-hide {
     transform: translateY(0);
     transition: transform 0.3s ease;
 }
 
 /* 滚动时隐藏浮动按钮 */
-body.aksrt-scrolling .aksrt-floating-right.scrolling-hide {
+body.jio-scrolling .jio-floating-right.scrolling-hide {
     opacity: 0;
     pointer-events: none;
     transition: opacity 0.2s;
 }
 
 /* body-scroll 状态类 */
-body.aksrt-body-scroll .aksrt-show-on-scroll {
+body.jio-body-scroll .jio-show-on-scroll {
     opacity: 1;
     visibility: visible;
 }
 
-.aksrt-show-on-scroll {
+.jio-show-on-scroll {
     opacity: 0;
     visibility: hidden;
     transition: opacity 0.3s, visibility 0.3s;
 }
 
 /* 可缩放图片的光标 */
-.aksrt-cursor-zoom-in {
+.jio-cursor-zoom-in {
     cursor: zoom-in;
 }