✨ feat: i18n support for header, subtitle and about pages

src/pages/[...about].astro

@@ -1,6 +1,7 @@
 ---
 import { allLocales, defaultLocale } from '@/config'
 import Layout from '@/layouts/Layout.astro'
+import { getCollection } from 'astro:content'
 
 export async function getStaticPaths() {
   type PathItem = {
@@ -30,17 +31,16 @@ export async function getStaticPaths() {
 }
 
 const { lang } = Astro.props
+
+const allAboutEntries = await getCollection('about')
+const aboutEntry = allAboutEntries.find(entry => entry.data.lang === lang)
+  || allAboutEntries.find(entry => entry.data.lang === '')
+const { Content } = aboutEntry ? await aboutEntry.render() : { Content: null }
 ---
 
 <Layout>
   <div class="uno-decorative-line"></div>
   <div class="heti mt-4.375">
-    {lang === 'en'
-? (
-      <p>Retypeset is a static blog theme based on the <a href="https://astro.build/">Astro</a> framework, inspired by <a href="https://astro-theme-typography.vercel.app/">Typography</a>. Retypeset establishes a new visual standard and reimagines the layout of all pages, offering a reading experience similar to paper books, reviving the beauty of typography. Details in every sight, elegance in every space.</p>
-    )
-: (
-      <p>Retypeset 是一款基于<a href="https://astro.build/">Astro</a>框架的静态博客主题，设计灵感来自<a href="https://astro-theme-typography.vercel.app/">Typography</a>。本主题通过建立全新的视觉规范，对所有页面进行重新编排，打造纸质书页般的阅读体验，再现版式之美。所见皆为细节，方寸尽显优雅。</p>
-    )}
+    {Content && <Content />}
   </div>
 </Layout>