chore(branding): remove leftover upstream theme identifiers

The theme was renamed Zibll/子比 → AKSRT → Jio, but upstream branding
survived the sweeps in CSS classes, the SVG sprite prefix, a persisted
widget field ID, JS events, admin Vue class names, test infrastructure
and docblocks.

Renames:
- zib-widget / zib-widget-wrap / zib-slider → jio-widget-box /
  jio-widget-box-wrap / jio-slider-box (jio-widget is taken by the modern
  widget shell, jio-box-* by the card primitives)
- zib-partners-scroll + zps-* → jio-partners-scroll + jps-*
- zib-combo-info-card + zci-* → jio-combo-info-card + jci-*
- zibsvg- → jiosvg-, including the exported picker helpers and the
  fa-zibsvg- family-prefix guard
- zibpay_type → pay_type; the dual-read fallback in PostQuery collapses
  to a single key
- [zibajax="submit"] dropped (no PHP emitter); zib_ajax.success →
  jio_ajax.success
- aks-* admin Vue classes → jio-*
- zib_palette() → palette()

User-facing vendor traces are gone: the floating "more" button default no
longer ships a zibll.com link or 子比主题 marketing copy, the notice
widget ships no preset promo entries, and the four 官网教程 links are
removed from the post-list admin schema.

Test infrastructure renamed to neutral names (docker-compose.reference.yml,
Caddyfile, article-baseline.json, modern-widgets-contract.test.cjs) with
their DB/volume/env/slug identifiers following.

Kept intentionally, documented in tests/fixtures/README.md: the golden
fixture reference fingerprint (a SHA-256 record of an external directory,
read by validate-widget-golden / generate-widget-golden-fixture /
audit-widget-system), the doesNotMatch guards that prove the old tokens are
gone, and the reference theme's own meta key in the visual fixtures.

No backward-compat or data migration: saved widget configs holding old
icon keys or the old field ID silently lose them, per the project's
rewrite-over-compatibility rule.

Verified: 132/132 node contract tests, php tests/widget-system/run.php
(146 assertions), audit-admin-contracts, audit-psr4-paths and
validate-widget-golden all green; tracked bundles regenerated and in sync.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/Core/FrontSubmitChunk.php

@@ -229,7 +229,7 @@ trait FrontSubmitChunk {
 		];
 	}
 
-	/** 分片临时目录（参考主题为 wp-content/zib-temp，带 index.php 保护和 48h 清理）。 */
+	/** 分片临时目录（wp-content/jio-temp，带 index.php 保护和 48h 清理）。 */
 	private function chunk_temp_dir(): string {
 		$temp_dir = (string) apply_filters('jio_temp_dir', WP_CONTENT_DIR . '/jio-temp');
 		if (!@is_dir($temp_dir)) {

src/Core/ScriptsPart1c.php

@@ -473,10 +473,10 @@ trait ScriptsPart1c {
             'debugLog'              => defined('WP_DEBUG') && WP_DEBUG && defined('WP_DEBUG_LOG') && WP_DEBUG_LOG,
             'postPaginationMode'    => class_exists('\Jio\Settings\Settings') ? \Jio\Settings\Settings::get_post_pagination_mode() : 'load_more',
             'commentPaginationMode' => class_exists('\Jio\Settings\Settings') ? \Jio\Settings\Settings::get_comment_pagination_mode() : 'numbered',
-            // AJAX 翻页文案（参考主题 zib__('load_more') / 'ajax_nomore'）
+            // AJAX 翻页文案
             'ajaxTrigger'           => (class_exists('\Jio\Settings\Settings') && ($t = \Jio\Settings\Settings::get_post_list_style_settings()['ajax_trigger'] ?? '') !== '') ? $t : '<i class="fa fas fa-angle-right"></i>' . __('加载更多', 'jio'),
             'ajaxNomore'            => (class_exists('\Jio\Settings\Settings') && ($n = \Jio\Settings\Settings::get_post_list_style_settings()['ajax_nomore'] ?? '') !== '') ? $n : __('没有更多内容了', 'jio'),
-            // 骨架兜底文案，仅在没有 post_ajax_loader 时使用（参考主题 zib__('loading')）。
+            // 骨架兜底文案，仅在没有 post_ajax_loader 时使用。
             'ajaxLoading'           => __('加载中...', 'jio'),
             'iasMax'                => class_exists('\Jio\Settings\Settings') ? \Jio\Settings\Settings::get_post_list_style_settings()['ias_max'] : 3,
             'commentIasAuto'        => class_exists('\Jio\Settings\Settings') ? \Jio\Settings\Settings::get_comment_display_settings()['paging_ajax_ias'] : true,

src/Core/TermMeta.php

@@ -108,7 +108,7 @@ class TermMeta {
             $description = (string) $term->description;
         }
 
-        // 高级筛选（参考主题 zib-category.php 语义）：cat 页按 cat_custom_filter 全量覆盖
+        // 分类高级筛选语义：cat 页按 cat_custom_filter 全量覆盖
         // 筛选项目，未匹配或 tag 页回退默认配置，custom_filter_show 决定自定义筛选显示。
         $page = $taxonomy === 'post_tag' ? 'tag' : 'cat';
         $custom_filter = class_exists('\Jio\Settings\Settings')
@@ -203,7 +203,7 @@ class TermMeta {
 		}
 
 
-		// 自定义高级筛选维度 meta 过滤（参考主题 zib_sift_posts_per_page：meta_query LIKE；
+		// 自定义高级筛选维度 meta 过滤（meta_query LIKE；
 		// meta 值为序列化数组，用带引号精确匹配避免前缀误命中）。
 		if (!empty($settings['custom_filter_enabled'])) {
 			$keys = $settings['custom_filter_keys'];