feat: 重构导航和博客系统，支持多级菜单和API数据源

- 重构导航菜单支持多级子菜单结构
- 博客系统改为从API获取数据，移除本地文件存储
- 删除旧的关于页面，准备重构
- 修复博客详情页slug匹配问题
- 默认首页重定向到中文版本

app/[locale]/blog/page.tsx

@@ -9,7 +9,7 @@ import { getTranslations } from "next-intl/server";
 
 type Params = Promise<{ locale: string }>;
 
-type SearchParams = { page?: string; type?: string };
+type SearchParams = { page?: string; category?: string };
 
 type MetadataProps = {
   params: Params;
@@ -36,34 +36,18 @@ export default async function Page({
   searchParams,
 }: {
   params: Params;
-  searchParams?: SearchParams;
+  searchParams: Promise<{ [key: string]: string | string[] | undefined }>;
 }) {
   const { locale } = await params;
-  let { posts } = await getPosts(locale);
+  const resolvedSearchParams = await searchParams;
+  const category = resolvedSearchParams.category as string || "";
+
+  let { posts } = await getPosts(locale, category);
 
   const t = await getTranslations("Blog");
 
-  // 分类筛选（公司新闻/专家访谈/行业动态/公告）
-  const type = (searchParams?.type || "").toLowerCase();
-  const typeLabelMap: Record<string, string> = {
-    company: "公司新闻",
-    experts: "专家访谈",
-    industry: "行业动态",
-    notice: "公告",
-  };
-  const typeLabel = typeLabelMap[type];
-  if (type) {
-    posts = posts.filter((p) => {
-      const metaType = String((p.metadata as any)?.type || "").toLowerCase();
-      const tags: string[] = (p.tags as any) || [];
-      const hitMeta = metaType === type;
-      const hitTag = Array.isArray(tags) && tags.some((t) => String(t).toLowerCase() === type);
-      return hitMeta || hitTag;
-    });
-  }
-
-  const pageRaw = searchParams?.page;
-  const page = Math.max(1, parseInt(pageRaw || "1", 10));
+  const pageRaw = resolvedSearchParams.page as string || "1";
+  const page = Math.max(1, parseInt(pageRaw, 10));
   const pageSize = 10;
   const totalPages = Math.max(1, Math.ceil(posts.length / pageSize));
   const start = (page - 1) * pageSize;
@@ -77,14 +61,14 @@ export default async function Page({
       {/* 顶部操作区：标签 + 面包屑 */}
       <div className="container mx-auto px-4">
         <div className="flex flex-col md:flex-row md:items-center md:justify-between gap-4 mt-4">
-          <div className="flex gap-3">
+          {/* <div className="flex gap-3">
             <button className="px-4 py-2 rounded-md border bg-white text-gray-700 shadow-sm hover:bg-gray-50">
               投资者保护
             </button>
             <button className="px-4 py-2 rounded-md border bg-white text-gray-700 shadow-sm hover:bg-gray-50">
               公司公告
             </button>
-          </div>
+          </div> */}
           <div className="flex items-center gap-2 text-sm text-gray-500">
             <I18nLink href="/" prefetch={false} className="hover:underline">
               首页
@@ -93,12 +77,12 @@ export default async function Page({
             <I18nLink href="/blog" prefetch={false} className="hover:underline">
               新闻中心
             </I18nLink>
-            {typeLabel && (
+            {/* {typeLabel && (
               <>
                 <span>/</span>
                 <span className="text-gray-700">{typeLabel}</span>
               </>
-            )}
+            )} */}
           </div>
         </div>
 
@@ -111,7 +95,7 @@ export default async function Page({
             return (
               <I18nLink
                 key={post.slug}
-                href={`/blog${post.slug}`}
+                href={`/blog/${post.slug}`}
                 prefetch={false}
                 className="block rounded-md mb-4 bg-gray-100 px-6 py-5 transition-all duration-200 shadow hover:bg-gray-200 hover:translate-y-[1px] hover:shadow-inner active:translate-y-[2px] active:shadow-inner focus:outline-none focus:ring-1 focus:ring-gray-300"
               >
@@ -139,9 +123,8 @@ export default async function Page({
           <I18nLink
             href={`/blog?page=${Math.max(1, page - 1)}`}
             prefetch={false}
-            className={`px-2.5 py-1 border rounded-sm text-sm ${
-              page === 1 ? "bg-gray-100 text-gray-400" : "bg-white hover:bg-gray-50"
-            }`}
+            className={`px-2.5 py-1 border rounded-sm text-sm ${page === 1 ? "bg-gray-100 text-gray-400" : "bg-white hover:bg-gray-50"
+              }`}
           >
             {"<"}
           </I18nLink>
@@ -167,11 +150,10 @@ export default async function Page({
                   key={it}
                   href={`/blog?page=${it}`}
                   prefetch={false}
-                  className={`px-2.5 py-1 border rounded-sm text-sm ${
-                    isActive
-                      ? "bg-red-600 text-white border-red-600"
-                      : "bg-white hover:bg-gray-50"
-                  }`}
+                  className={`px-2.5 py-1 border rounded-sm text-sm ${isActive
+                    ? "bg-red-600 text-white border-red-600"
+                    : "bg-white hover:bg-gray-50"
+                    }`}
                 >
                   {it}
                 </I18nLink>
@@ -181,9 +163,8 @@ export default async function Page({
           <I18nLink
             href={`/blog?page=${Math.min(totalPages, page + 1)}`}
             prefetch={false}
-            className={`px-2.5 py-1 border rounded-sm text-sm ${
-              page === totalPages ? "bg-gray-100 text-gray-400" : "bg-white hover:bg-gray-50"
-            }`}
+            className={`px-2.5 py-1 border rounded-sm text-sm ${page === totalPages ? "bg-gray-100 text-gray-400" : "bg-white hover:bg-gray-50"
+              }`}
           >
             {">"}
           </I18nLink>