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>

tests/front-submit/editor-fullscreen-contract.test.cjs

@@ -28,7 +28,7 @@ test('the Zibll toolbar affix rules stay removed', () => {
     .map((entry) => read(`assets/js/${entry.name}`))
     .join('\n');
 
-  // No AKSRT script adds .affix to .mce-top-part (that was Zibll's
+  // No Jio script adds .affix to .mce-top-part (that was Zibll's
   // editextend.js), so the affix positioning rules must not come back.
   assert.doesNotMatch(css, /mce-top-part\.affix/);
   assert.doesNotMatch(js, /mce-top-part/);

tests/front-submit/featured-buttons-contract.test.cjs

@@ -15,7 +15,7 @@ test('featured box shows only the icon image/video buttons and no slide button',
   // multi-select, so it renders whenever either capability is granted.
   assert.match(
     featured,
-    /if \(\$can_image \|\| \$can_slide\) : \?>\s*\n\s*<button type="button" class="but btn-image" data-featured-action="image"\s*\n\s*title="<\?php esc_attr_e\('图片', 'aksrt'\); \?>"\s*\n\s*aria-label="<\?php esc_attr_e\('图片', 'aksrt'\); \?>">\s*\n\s*<i class="fa fas fa-image"><\/i>\s*\n\s*<\/button>/
+    /if \(\$can_image \|\| \$can_slide\) : \?>\s*\n\s*<button type="button" class="but btn-image" data-featured-action="image"\s*\n\s*title="<\?php esc_attr_e\('图片', 'jio'\); \?>"\s*\n\s*aria-label="<\?php esc_attr_e\('图片', 'jio'\); \?>">\s*\n\s*<i class="fa fas fa-image"><\/i>\s*\n\s*<\/button>/
   );
 
   // The dedicated slide button is gone; slide covers come from multi-select.

tests/front-submit/video-cover-contract.test.cjs

@@ -17,11 +17,11 @@ test('featured box renders a playable video preview and a video-cover button', (
   assert.match(featured, /fa fas fa-play-circle/);
 
   // The video-cover button is capability-gated like the video button.
-  assert.match(featured, /if \(\$can_video\) : \?>\s*\n\s*<button type="button" class="but btn-video-pic" data-featured-action="video_pic"\s*\n\s*title="<\?php esc_attr_e\('设置视频封面', 'aksrt'\); \?>"/);
+  assert.match(featured, /if \(\$can_video\) : \?>\s*\n\s*<button type="button" class="but btn-video-pic" data-featured-action="video_pic"\s*\n\s*title="<\?php esc_attr_e\('设置视频封面', 'jio'\); \?>"/);
 
   // The video row (video cover / video / clear) is icon-only with hover titles.
-  assert.match(featured, /btn-video" data-featured-action="video"\s*\n\s*title="<\?php esc_attr_e\('视频', 'aksrt'\); \?>"\s*\n\s*aria-label="<\?php esc_attr_e\('视频', 'aksrt'\); \?>">\s*\n\s*<i class="fa fas fa-video"><\/i>\s*\n\s*<\/button>/);
-  assert.match(featured, /btn-delete" data-featured-action="close"[\s\S]*?title="<\?php esc_attr_e\('清除', 'aksrt'\); \?>"/);
+  assert.match(featured, /btn-video" data-featured-action="video"\s*\n\s*title="<\?php esc_attr_e\('视频', 'jio'\); \?>"\s*\n\s*aria-label="<\?php esc_attr_e\('视频', 'jio'\); \?>">\s*\n\s*<i class="fa fas fa-video"><\/i>\s*\n\s*<\/button>/);
+  assert.match(featured, /btn-delete" data-featured-action="close"[\s\S]*?title="<\?php esc_attr_e\('清除', 'jio'\); \?>"/);
   assert.doesNotMatch(featured, /首图|>视频<|>清除</);
 
   // Dead capability attributes are gone.
@@ -78,7 +78,7 @@ test('i18n exposes the video-cover strings and dead keys are removed', () => {
   const editorJs = read('assets/js/front-submit-editor.js');
   const submitJs = read('assets/js/front-submit.js');
 
-  assert.match(page, /'setVideoCoverTitle' => __\('为视频设置封面', 'aksrt'\)/);
+  assert.match(page, /'setVideoCoverTitle' => __\('为视频设置封面', 'jio'\)/);
   // The unused setVideoCover key died with the visible button label it served.
   assert.doesNotMatch(page, /'setVideoCover' =>/);
   assert.doesNotMatch(page, /首图/);
@@ -92,9 +92,9 @@ test('i18n exposes the video-cover strings and dead keys are removed', () => {
   assert.doesNotMatch(submitJs, /i18n\.pickVideoCover/);
 });
 
-test('the unused aksrt_update_post ajax endpoint is removed', () => {
+test('the unused jio_update_post ajax endpoint is removed', () => {
   const frontSubmit = read('src/Core/FrontSubmit.php');
 
-  assert.doesNotMatch(frontSubmit, /aksrt_update_post/);
+  assert.doesNotMatch(frontSubmit, /jio_update_post/);
   assert.doesNotMatch(frontSubmit, /ajax_update_post/);
 });