feat: 首页打字机动画完全可配置，TypeWriteList 为空或注释时不再渲染标签和动画

- MainHeader.astro 条件渲染 <p class=desc>，仅在 TypeWriteList 有内容时输出
- Init.ts/TypeWrite.ts 仅在 TypeWriteList 有内容时初始化动画
- 彻底清理无用标签和副作用，提升主题可定制性

src/components/MainHeader/MainHeader.astro

@@ -8,5 +8,7 @@ import "./MainHeader.less";
 		<img src="/assets/images/lazy-loading.webp" data-vh-lz-src={SITE_INFO.Avatar} alt="avatar" />
 	</div>
 	<h3 class="auther">{SITE_INFO.Author || "-"}</h3>
+{Array.isArray(SITE_INFO.TypeWriteList) && SITE_INFO.TypeWriteList.length > 0 && (
 	<p class="desc"></p>
+)}
 </div>

src/scripts/Init.ts

@@ -80,7 +80,7 @@ const indexInit = async (only: boolean = true) => {
   // Han Analytics 统计
   HanAnalyticsInit();
   // 打字效果
-  only && TypeWriteInit();
+  only && Array.isArray(SITE_INFO.TypeWriteList) && SITE_INFO.TypeWriteList.length > 0 && TypeWriteInit();
   // 泡泡🫧效果
   PaoPaoInit();
   // 预加载搜索数据

src/scripts/TypeWrite.ts

@@ -3,6 +3,8 @@ export default () => {
   const writeDom = document.querySelector('.header-main>.desc');
   if (!writeDom) return;
   const TypeWriteList = SITE_INFO.TypeWriteList;
+  // 如果 TypeWriteList 不是数组或没有内容则不执行动画
+  if (!Array.isArray(TypeWriteList) || TypeWriteList.length === 0) return;
   let TypeWriteListIndex = 0;
   let index = 0;
   let isDeleting = false;