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>

tests/widget-system/run.php

@@ -122,10 +122,10 @@ final class WidgetSystemTest {
 		$generic_categories = PostQuery::arguments(['category_ids' => '2,5', 'category_id' => 9], 1);
 		$this->same([9], $generic_categories['category__in'], 'generic category_id continues to override category_ids');
 		$this->false(isset($generic_categories['cat']), 'generic categories do not switch to modern cat syntax');
-		$paywalled = PostQuery::arguments(['cat' => '1', 'zibpay_type' => ['1', '6'], 'paginate' => ''], 1, ['cat' => '1']);
+		$paywalled = PostQuery::arguments(['cat' => '1', 'pay_type' => ['1', '6'], 'paginate' => ''], 1, ['cat' => '1']);
 		$this->contains('reading', json_encode($paywalled['meta_query'] ?? []), 'tab commerce filters map to pay meta');
 		$this->contains('video', json_encode($paywalled['meta_query'] ?? []), 'tab commerce filters cover every selected type');
-		$top_level_paywall = PostQuery::arguments(['cat' => '1', 'zibpay_type' => ['2'], 'paginate' => 'ajax'], 1);
+		$top_level_paywall = PostQuery::arguments(['cat' => '1', 'pay_type' => ['2'], 'paginate' => 'ajax'], 1);
 		$this->contains('download', json_encode($top_level_paywall['meta_query'] ?? []), 'top-level reference commerce filters map to pay meta');
 		$generic_paywall = PostQuery::arguments(['category_ids' => '1', 'pay_type' => 'gallery'], 1);
 		$this->contains('gallery', json_encode($generic_paywall['meta_query'] ?? []), 'generic widget pay_type behavior remains available');
@@ -144,12 +144,12 @@ final class WidgetSystemTest {
 		$this->same(6, $tab_defaults['count'], 'modern tabs default to six posts');
 		$this->same(['热门推荐', '最近更新', '猜你喜欢'], array_column($tab_defaults['tabs'], 'title'), 'modern tab defaults match reference ordering');
 		$tab = FieldSchema::normalize($tab_fields, ['tabs' => [[
-			'title' => '<b>栏目</b><script>x</script>', 'cat' => '1，-2 3', 'zibpay_type' => ['1', '6'],
+			'title' => '<b>栏目</b><script>x</script>', 'cat' => '1，-2 3', 'pay_type' => ['1', '6'],
 			'order' => 'asc',
 		]]]);
 		$this->same('1,-2,3', $tab['tabs'][0]['cat'], 'tab cat keeps signed reference IDs');
 		$this->false(isset($tab['tabs'][0]['topics']), 'topic filters are gone from tab configuration');
-		$this->same(['1', '6'], $tab['tabs'][0]['zibpay_type'], 'tab commerce filters are preserved');
+		$this->same(['1', '6'], $tab['tabs'][0]['pay_type'], 'tab commerce filters are preserved');
 		$this->contains('<b>栏目</b>', $tab['tabs'][0]['title'], 'tab title keeps controlled HTML');
 		$this->false(str_contains($tab['tabs'][0]['title'], '<script>'), 'tab title strips unsafe HTML');
 
@@ -211,7 +211,7 @@ final class WidgetSystemTest {
 		$notice_defaults = FieldSchema::defaults(WidgetSchemas::for('notice'));
 		$this->same(3, $notice_defaults['interval'], 'notice keeps reference interval');
 		$this->same('c-blue', $notice_defaults['color'], 'notice keeps reference color');
-		$this->same(2, count($notice_defaults['img_ids']), 'notice ships reference custom messages');
+		$this->same(0, count($notice_defaults['img_ids']), 'notice ships no preset messages');
 		$notice = GeneralRenderer::render('notice', $notice_defaults);
 		$this->contains('swiper-bulletin mb20 c-blue main-radius', $notice, 'notice emits reference surface classes');
 		$this->contains('data-direction="vertical" data-loop="true" data-autoplay="1"', $notice, 'notice emits reference swiper options');