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/Admin/Schema/SchemaPayment.php

@@ -10,8 +10,8 @@ defined('ABSPATH') || exit;
 /**
  * 「支付&付费」设置 schema。
  *
- * 页面结构 1:1 复刻参考主题 Zibll 的「支付&付费」section（知识付费 / 余额充值 /
- * VIP会员 / 创作分成 / 推广返佣 / 收款接口），并按产品需求新增「提现策略」子页。
+ * 页面结构：知识付费 / 余额充值 / VIP会员 / 创作分成 / 推广返佣 / 收款接口，
+ * 另含产品需求的「提现策略」子页。
  * 收款接口仅保留支付宝、微信、PayPal、Stripe、易支付；订单、资金流水与提现
  * 统一使用同一套流水号，无可配置前缀。
  */
@@ -678,7 +678,7 @@ class SchemaPayment {
 	}
 
 	/**
-	 * 标签颜色调色板（参考主题 zib_palette(array(), array('b','jb'))）。
+	 * 标签颜色调色板（b / jb 前缀两类）。
 	 *
 	 * @return array<int,array<string,string>>
 	 */