feat: add markdown content pipeline with build script

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/lib/content.ts

@@ -0,0 +1,33 @@
+import type { Language } from './translations';
+
+export interface ContentMeta {
+  slug: string;
+  title: string;
+  description: string;
+  date: string;
+  tags: string[];
+  order?: number;
+  cover?: string;
+}
+
+export interface ContentManifest {
+  en: ContentMeta[];
+  zh: ContentMeta[];
+}
+
+export interface ContentItem {
+  meta: ContentMeta;
+  html: string;
+}
+
+const BASE = '/content';
+
+export async function loadManifest(type: 'docs' | 'blog'): Promise<ContentManifest> {
+  const res = await fetch(`${BASE}/${type}-manifest.json`);
+  return res.json();
+}
+
+export async function loadContent(type: 'docs' | 'blog', lang: Language, slug: string): Promise<ContentItem> {
+  const res = await fetch(`${BASE}/${type}/${lang}/${slug}.json`);
+  return res.json();
+}