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/widget-system/frontend-avatar-shape-contract.test.cjs

@@ -34,7 +34,7 @@ test('the global avatar shape primitive renders every avatar image circular', ()
   assert.match(block, /object-fit:\s*cover/);
 
   // The primitive must follow the existing avatar size system in the same file.
-  const sizeSystem = css.indexOf('.aksrt-avatar--xs {');
+  const sizeSystem = css.indexOf('.jio-avatar--xs {');
   assert.ok(sizeSystem >= 0 && sizeSystem < start, 'primitive must sit after the avatar size system');
 });
 
@@ -49,8 +49,8 @@ test('the user center and public user home keep their legacy rounded-square avat
   // img and the upload overlay both inherit the frame radius.
   assert.match(profile, /\.uc-header__avatar img\s*\{[^}]*border-radius:\s*inherit/s);
 
-  assert.match(userHome, /\.aksrt-author-hero__avatar img\s*\{[^}]*border-radius:\s*var\(--radius\)/s);
-  assert.doesNotMatch(userHome, /\.aksrt-author-hero__avatar img\s*\{[^}]*--radius-avatar/s);
+  assert.match(userHome, /\.jio-author-hero__avatar img\s*\{[^}]*border-radius:\s*var\(--radius\)/s);
+  assert.doesNotMatch(userHome, /\.jio-author-hero__avatar img\s*\{[^}]*--radius-avatar/s);
 });
 
 test('every other frontend avatar frame is circular', () => {
@@ -79,18 +79,18 @@ test('the VIP modal avatar carries the canonical avatar class', () => {
 
 test('the VIP icon leaves the avatar corner and leads the badge row', () => {
   const userRenderer = read('src/WidgetSystem/Renderers/UserRenderer.php');
-  const singleRender = read('inc/helpers/aksrt-single-render.php');
+  const singleRender = read('inc/helpers/jio-single-render.php');
   const signin = read('src/Credits/Signin.php');
 
-  for (const [file, source] of [['UserRenderer.php', userRenderer], ['aksrt-single-render.php', singleRender]]) {
-    assert.match(source, /aksrt_get_avatar_box\([^)]*'avatar-img avatar-lg',\s*true,\s*false\)/, `${file} must drop the avatar corner badge`);
+  for (const [file, source] of [['UserRenderer.php', userRenderer], ['jio-single-render.php', singleRender]]) {
+    assert.match(source, /jio_get_avatar_box\([^)]*'avatar-img avatar-lg',\s*true,\s*false\)/, `${file} must drop the avatar corner badge`);
     assert.match(source, /'vip'\s+=>\s+true/, `${file} must render the VIP icon in the name row`);
     assert.doesNotMatch(source, /'vip'\s+=>\s+false/);
   }
 
-  assert.match(signin, /aksrt_get_avatar_box\(\$user_id,\s*'avatar-img avatar-mini mr6',\s*false,\s*false\)/);
-  assert.match(signin, /aksrt_get_user_ban_name_badge\(\$user_id\)/);
-  assert.match(signin, /aksrt_get_vip_icon\(\$user_id\)/);
+  assert.match(signin, /jio_get_avatar_box\(\$user_id,\s*'avatar-img avatar-mini mr6',\s*false,\s*false\)/);
+  assert.match(signin, /jio_get_user_ban_name_badge\(\$user_id\)/);
+  assert.match(signin, /jio_get_vip_icon\(\$user_id\)/);
   assert.match(signin, /\$avatar_img \. esc_html\(\$user->display_name\) \. \$name_badge/);
 });
 
@@ -104,19 +104,19 @@ test('no frontend call site opts into the avatar corner VIP badge', () => {
       if (entry.isDirectory()) { walk(full); continue; }
       if (!/\.(php|js)$/.test(entry.name) || entry.name.endsWith('.min.js')) continue;
       const source = fs.readFileSync(full, 'utf8');
-      const pattern = /aksrt_get_avatar_box\([^;]*?,\s*(?:true|false),\s*true\s*\)/g;
+      const pattern = /jio_get_avatar_box\([^;]*?,\s*(?:true|false),\s*true\s*\)/g;
       for (const match of source.matchAll(pattern)) {
         offenders.push(`${path.relative(root, full).split(path.sep).join('/')}: ${match[0]}`);
       }
     }
   };
   walk(root);
-  assert.deepEqual(offenders, [], 'aksrt_get_avatar_box() must no longer mount a badge on the avatar');
+  assert.deepEqual(offenders, [], 'jio_get_avatar_box() must no longer mount a badge on the avatar');
 });
 
 test('the avatar helper keeps its corner badge contract for callers that still want it', () => {
-  const avatar = read('inc/helpers/aksrt-avatar.php');
-  assert.match(avatar, /function aksrt_get_avatar_box\(\$id_or_email, string \$class = 'avatar-img', bool \$link = true, bool \$vip = true\)/);
+  const avatar = read('inc/helpers/jio-avatar.php');
+  assert.match(avatar, /function jio_get_avatar_box\(\$id_or_email, string \$class = 'avatar-img', bool \$link = true, bool \$vip = true\)/);
   assert.match(avatar, /class="avatar-badge"/);
 });