feat(contact): 更新联系页面模板以支持动态内容

- 将静态标题替换为动态内容变量 {$current_cate.content|raw}
- 使用动态缩略图URL {$current_cate.thumbnail.url ?? ''}
- 更新意见反馈链接从 contact.html 到 yijianfankui.html

public/themes/website/1/zh/demo/components/header.html

@@ -440,7 +440,7 @@
                                     <li><a href="/faq.html">常见问题</a></li>
                                     <li><a href="/video.html">视频教程</a></li>
                                     <li><a href="/announce.html">产品公告</a></li>
-                                    <li><a href="/contact.html">意见反馈</a></li>
+                                    <li><a href="/yijianfankui.html">意见反馈</a></li>
                                 </ul>
                             </div>
                         </div>

public/themes/website/1/zh/demo/contact.html

@@ -53,12 +53,10 @@
   <!-- 引入公共头部 -->
   <!-- header -->
   {include file="components/header"}
-
   <main class="main-contact" data-header-dark>
     <section class="c-intro section__wrap">
       <h1 class="c-intro__title">
-        <span>以客户为中心</span>
-        <span>持续为客户创造价值</span>
+        <span>{$current_cate.content|raw}</span>
       </h1>
       <div class="c-intro__hotline">
         <div class="c-intro__hotline-label">
@@ -72,7 +70,7 @@
 
     <section class="c-banner" aria-label="服务入口">
       <div class="c-banner__media" aria-hidden="true">
-        <img src="./static/images/section-1-img-C5RHGv5A.png" alt="" width="1920" height="720" />
+        <img src="{$current_cate.thumbnail.url ?? ''}" alt="" width="1920" height="720" />
       </div>
       <div class="c-banner__cards section__wrap">
         <a class="c-card" href="/download.html">