feat: 优化调整卡片样式布局

- 站点卡片改为紧凑布局并统一动态渲染
- 搜索框玻璃拟态与 Ctrl/Cmd+K 聚焦

templates/layouts/default.hbs

@@ -104,7 +104,7 @@
             <!-- 搜索框容器 -->
             <div class="search-container">
                 <div class="search-box">
-                    <input type="text" id="search" placeholder="搜索...">
+                    <input type="text" id="search" placeholder="搜索 Ctrl+K ..." aria-label="搜索" aria-keyshortcuts="Control+K Meta+K">
                     <i class="fas fa-search search-icon" title="本地搜索"></i>
                     <i class="fas fa-chevron-down search-engine-toggle" title="选择搜索引擎" role="button" aria-label="选择搜索引擎" aria-expanded="false" tabindex="0"></i>
                     <div class="search-engine-dropdown">