fix(widgets): restore single-card reference UI for search and quote widgets

The 搜索框 and 一言 sidebar widgets fell into the generic renderer branch, so
they rendered a .jio-panel card wrapping a second bespoke card
(.jio-widget-search / .jio-widget-quote). In-article 一言 also used
divergent modifier classes and an extra hover rule.

- search: render through the shared jio_get_search_box() (legacy keyword,
  history and category pickers) inside one reference card, mirroring the
  reference widget's markup and title default 「搜索」
- quote: render the reference .yiyan-box card itself as the click root; the
  shell now emits only the reference widget-container/title wrapper
- article 一言: adopt the reference class lists for header, footer and the
  standalone after-article box; drop the invented yiyan--* modifiers and
  the duplicate hover/opacity rules
- client: fill .cn/.en in the reference order (first line .cn, second .en)
  and drop the stale window.JioYiyan bridge plus the dead qv-yiyan.php AJAX
  path in runtime main.js
- schema: replace the ad-hoc search_style radio with the reference switches
  (keywords, history, input category, more_cats) and default title
- assets: enqueue assets/js/yiyan.js through the quote widget's asset list

Tests: widget-system suite 820/821 (the one failure is the pre-existing
frontend-lifecycle theme-init stub); new search/quote card contracts pass.

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

tests/widget-system/yiyan-reference-contract.test.cjs

@@ -20,15 +20,22 @@ test('article and modern widget yiyan use the reference bilingual quote source a
   assert.match(helper, /\/yiyan\/qv-yiyan\.txt/);
   assert.match(helper, /wp_ajax_nopriv_jio_yiyan/);
   assert.match(helper, /'en'\s*=>\s*\$lines\[\$i\],\s*'cn'\s*=>\s*\$lines\[\$i\s*\+\s*1\]/);
-  assert.match(helper, /class="yiyan"><div class="en"><\/div><div class="cn">/);
+  // 参考结构：.yiyan 初始为空，由脚本写入 .cn/.en。
+  assert.match(helper, /class="yiyan"><\/div>/);
+  // 参考主题：句库首行进 .cn（正文尺寸），次行进 .en（0.8em）。
+  assert.match(client, /lineCn\.textContent = quote\.en/);
+  assert.match(client, /lineEn\.textContent = quote\.cn/);
   assert.match(client, /REFRESH_MS\s*=\s*30000/);
   assert.match(client, /on\('auto_fun\.jio-yiyan', function \(\) \{\s*init\(document\)/);
   assert.match(client, /event\.key === 'Enter' \|\| event\.key === ' '/);
-  assert.match(widgetClient, /window\.JioYiyan\.init\(figure\)/);
-  assert.match(renderer, /jio_get_yiyan_markup\(\['class' => 'jio-widget-quote'\]\)/);
+  // 小工具端不再单独初始化：yiyan.js 直接监听 [data-jio-yiyan]。
+  assert.match(widgetClient, /scope\.querySelectorAll\('\.jio-widget-video\[data-video-url\]'\)/);
+  assert.doesNotMatch(widgetClient, /JioYiyan/);
+  assert.match(renderer, /yiyan-box main-bg text-center box-body radius8 main-shadow/);
+  assert.match(renderer, /jio_get_yiyan_markup/);
   assert.doesNotMatch(rest, /v1\.hitokoto\.cn|function get_quote/);
   assert.match(schema, /case 'quote':\s*return \[\];/);
-  assert.match(widgetStyles, /\.jio-widget-quote \.yiyan \.en/);
+  assert.doesNotMatch(widgetStyles, /\.jio-widget-quote/);
   assert.ok(catalog.length > 10, 'the bundled quote file should contain a useful quote set');
   assert.equal((catalog.length - 1) % 2, 0, 'after the title, quote lines must form English/Chinese pairs');
 });