Revert "fix docs: home heading and remove title marker"

This reverts commit ae5f975.

Author: kael-odin

src/content/docs/index.md

@@ -4,6 +4,8 @@ description: CoreClaw is dedicated to providing efficient, stable, and scalable
 template: splash
 ---
 
+<span class="hide-starlight-title"></span>
+
 <div class="breadcrumb-home">
 	<a href="https://coreclaw.com" class="breadcrumb-home-link">Home</a>
 	<svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="m9 18 6-6-6-6"/></svg>

src/content/docs/zh-cn/index.md

@@ -4,6 +4,8 @@ description: CoreClaw 致力于为不同背景和技术能力的用户提供高
 template: splash
 ---
 
+<span class="hide-starlight-title"></span>
+
 <div class="breadcrumb-home">
 	<a href="https://coreclaw.com" class="breadcrumb-home-link">首页</a>
 	<svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="m9 18 6-6-6-6"/></svg>

src/styles/common.css

@@ -1726,6 +1726,9 @@ summary:focus-visible {
    Hide Starlight auto title on splash pages
    ======================================== */
 
+.sl-markdown-content:has(.hide-starlight-title) > h1#_top:first-child {
+    display: none;
+}
 .company-footer {
     text-align: center;
     padding: 48px 24px 32px;