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>

assets/js/yiyan.js

@@ -26,10 +26,26 @@
         var quote = response && response.success && response.data;
         if (!quote || !quote.cn || !quote.en) throw new Error('empty quote');
 
-        var cn = el.querySelector('.cn');
-        var en = el.querySelector('.en');
-        if (cn) cn.textContent = quote.cn;
-        if (en) en.textContent = quote.en;
+        // 参考结构：.yiyan 初始为空，由脚本写入首行 .cn 与次行 .en。
+        var body = el.querySelector('.yiyan');
+        if (body) {
+          var cn = body.querySelector('.cn');
+          var en = body.querySelector('.en');
+          if (cn && en) {
+            cn.textContent = quote.en;
+            en.textContent = quote.cn;
+          } else {
+            body.innerHTML = '';
+            var lineCn = document.createElement('div');
+            lineCn.className = 'cn';
+            lineCn.textContent = quote.en;
+            var lineEn = document.createElement('div');
+            lineEn.className = 'en';
+            lineEn.textContent = quote.cn;
+            body.appendChild(lineCn);
+            body.appendChild(lineEn);
+          }
+        }
         el.classList.remove('is-loading');
         el.classList.remove('is-error');
         el.classList.add('is-ready');
@@ -37,8 +53,8 @@
       .catch(function () {
         el.classList.remove('is-loading');
         el.classList.add('is-error');
-        var cn = el.querySelector('.cn');
-        if (cn && !el.classList.contains('is-ready')) cn.textContent = '加载失败，点击重试';
+        var body = el.querySelector('.yiyan');
+        if (body && !el.classList.contains('is-ready')) body.textContent = '加载失败，点击重试';
       })
       .finally(function () {
         delete el.dataset.loading;
@@ -70,8 +86,6 @@
     });
   }
 
-  window.JioYiyan = { init: init };
-
   if (window.jQuery) {
     window.jQuery(document).off('auto_fun.jio-yiyan').on('auto_fun.jio-yiyan', function () {
       init(document);