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/js/runtime/imgbox.js

@@ -185,18 +185,18 @@
             var swiper = '<div class="swiper-imgbox"><div class="swiper-wrapper"></div><div class="swiper-button-prev"></div><div class="swiper-button-next"></div><div class="abs-left counter-con"></div></div>';
             var thumbs_swiper = '<div class="swiper-thumbsbox"><div class="swiper-wrapper">' + '' + '</div><div class="swiper-button-prev"></div><div class="swiper-button-next"></div><div class="abs-center right-top"><i class="hide-but fa fas fa-angle-down em12"></i></div></div>';
 
-            var button = options.down ? '<a href="javascript:;" download class="img-down toggle-radius mr6" title="' + aksrt__('imgbox_download') + '"><i class="fa fas fa-download"></i></a>' : '';
+            var button = options.down ? '<a href="javascript:;" download class="img-down toggle-radius mr6" title="' + jio__('imgbox_download') + '"><i class="fa fas fa-download"></i></a>' : '';
             if (options.group) {
-                button += options.play ? '<a href="javascript:;" class="toggle-palay toggle-radius mr6" title="' + aksrt__('imgbox_play') + '"><i class="fa fas fa-play"></i></a>' : '';
+                button += options.play ? '<a href="javascript:;" class="toggle-palay toggle-radius mr6" title="' + jio__('imgbox_play') + '"><i class="fa fas fa-play"></i></a>' : '';
                 if (options.thumbs) {
-                    button += '<a href="javascript:;" class="toggle-thumbs toggle-radius mr6" title="' + aksrt__('imgbox_view_more') + '"><i class="fa fas fa-th-large"></i></a>';
+                    button += '<a href="javascript:;" class="toggle-thumbs toggle-radius mr6" title="' + jio__('imgbox_view_more') + '"><i class="fa fas fa-th-large"></i></a>';
                     swiper += thumbs_swiper;
                 }
             }
 
-            button += options.zoom ? '<a href="javascript:;" class="toggle-zoom toggle-radius mr6" title="' + aksrt__('imgbox_toggle_zoom') + '"><i class="fa fas fa-search"></i></a>' : '';
-            button += options.full ? '<a href="javascript:;" class="hide-sm toggle-full toggle-radius mr6" title="' + aksrt__('imgbox_toggle_full') + '"><i class="fa fas fa-expand"></i></a>' : '';
-            button += '<a href="javascript:;" title="' + aksrt__('close') + '" class="icon-close toggle-radius"><svg viewBox="0 0 1024 1024" class="icon em12"><path d="M573.44 512.128l237.888 237.696a43.328 43.328 0 0 1 0 59.712 43.392 43.392 0 0 1-59.712 0L513.728 571.84 265.856 819.712a44.672 44.672 0 0 1-61.568 0 44.672 44.672 0 0 1 0-61.568L452.16 510.272 214.208 272.448a43.328 43.328 0 0 1 0-59.648 43.392 43.392 0 0 1 59.712 0l237.952 237.76 246.272-246.272a44.672 44.672 0 0 1 61.568 0 44.672 44.672 0 0 1 0 61.568L573.44 512.128z"></path></svg></a>';
+            button += options.zoom ? '<a href="javascript:;" class="toggle-zoom toggle-radius mr6" title="' + jio__('imgbox_toggle_zoom') + '"><i class="fa fas fa-search"></i></a>' : '';
+            button += options.full ? '<a href="javascript:;" class="hide-sm toggle-full toggle-radius mr6" title="' + jio__('imgbox_toggle_full') + '"><i class="fa fas fa-expand"></i></a>' : '';
+            button += '<a href="javascript:;" title="' + jio__('close') + '" class="icon-close toggle-radius"><svg viewBox="0 0 1024 1024" class="icon em12"><path d="M573.44 512.128l237.888 237.696a43.328 43.328 0 0 1 0 59.712 43.392 43.392 0 0 1-59.712 0L513.728 571.84 265.856 819.712a44.672 44.672 0 0 1-61.568 0 44.672 44.672 0 0 1 0-61.568L452.16 510.272 214.208 272.448a43.328 43.328 0 0 1 0-59.648 43.392 43.392 0 0 1 59.712 0l237.952 237.76 246.272-246.272a44.672 44.672 0 0 1 61.568 0 44.672 44.672 0 0 1 0 61.568L573.44 512.128z"></path></svg></a>';
 
             _body.append('<div class="' + imgbox_calss + '" id="' + imgbox_id + '"><div class="modal-backdrop imgbox-bg"></div><div class="imgbox-an">' + button + '</div>' + swiper + '</div>');