feat(blog): implement blog structure with post listing, tagging, and layout enhancements (#1962)

* feat(blog): implement blog structure with post listing and tagging functionality

* feat(blog): enhance blog layout and post metadata display with new components

* fix(blog): address PR #1962 review feedback and fix lint issues (#14)

* fix: format

---------

Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>

frontend/src/app/[lang]/docs/layout.tsx

@@ -1,13 +1,12 @@
 import type { PageMapItem } from "nextra";
 import { getPageMap } from "nextra/page-map";
-import { Footer, Layout } from "nextra-theme-docs";
+import { Layout } from "nextra-theme-docs";
 
+import { Footer } from "@/components/landing/footer";
 import { Header } from "@/components/landing/header";
 import { getLocaleByLang } from "@/core/i18n/locale";
 import "nextra-theme-docs/style.css";
 
-const footer = <Footer>MIT {new Date().getFullYear()} © Nextra.</Footer>;
-
 const i18n = [
   { locale: "en", name: "English" },
   { locale: "zh", name: "中文" },
@@ -15,7 +14,7 @@ const i18n = [
 
 function formatPageRoute(base: string, items: PageMapItem[]): PageMapItem[] {
   return items.map((item) => {
-    if ("route" in item) {
+    if ("route" in item && !item.route.startsWith(base)) {
       item.route = `${base}${item.route}`;
     }
     if ("children" in item && item.children) {
@@ -29,6 +28,7 @@ export default async function DocLayout({ children, params }) {
   const { lang } = await params;
   const locale = getLocaleByLang(lang);
   const pages = await getPageMap(`/${lang}`);
+  const pageMap = formatPageRoute(`/${lang}/docs`, pages);
 
   return (
     <Layout
@@ -39,9 +39,9 @@ export default async function DocLayout({ children, params }) {
           locale={locale}
         />
       }
-      pageMap={formatPageRoute(`/${lang}/docs`, pages)}
-      docsRepositoryBase="https://github.com/bytedance/deerflow/tree/main/frontend/src/app/content"
-      footer={footer}
+      pageMap={pageMap}
+      docsRepositoryBase="https://github.com/bytedance/deerflow/tree/main/frontend/src/content"
+      footer={<Footer />}
       i18n={i18n}
       // ... Your additional layout options
     >