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/report-submit-runtime.test.cjs

@@ -134,12 +134,12 @@ test('preserves readable labels through the admin category filter, list, and det
   assert.equal(result.detail_report.category, '涉嫌侵权');
 });
 
-test('stores report categories as text and uses schema version 3.2.0', () => {
+test('stores report categories as text and uses schema version 3.3.0', () => {
   const migrator = fs.readFileSync(path.join(root, 'src/Core/DBMigrator.php'), 'utf8');
   const tableDefinitions = fs.readFileSync(path.join(root, 'src/Core/DBMigratorPart2.php'), 'utf8');
   const reportTable = tableDefinitions.match(/\$sql_report\s*=\s*"([\s\S]*?)";/);
 
-  assert.match(migrator, /const SCHEMA_VERSION\s*=\s*'3\.2\.0';/);
+  assert.match(migrator, /const SCHEMA_VERSION\s*=\s*'3\.3\.0';/);
   assert.ok(reportTable, 'report table definition should exist');
   assert.match(reportTable[1], /\bcategory\s+TEXT\s+NOT NULL\b/);
 });