F(frontend): add route loading feedback

src/app/blog/[slug]/page.tsx

@@ -1,10 +1,10 @@
 import type { Metadata } from "next";
-import Link from "next/link";
 import { notFound } from "next/navigation";
 import Markdown from "@/components/Markdown";
 import { Badge } from "@/components/ui/badge";
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
 import { Button } from "@/components/ui/button";
+import { Link } from "@/lib/router";
 import { PublicApiError, getPublicPost } from "@/lib/public-api";
 import { apiBaseUrl, siteUrl, toAbsoluteUrl } from "@/lib/site";
 import { formatJalali } from "@/lib/utils";
@@ -109,7 +109,7 @@ export default async function BlogDetailPage({
       <div className="container mx-auto px-4 py-8">
         <div className="mb-6 flex items-center justify-between gap-3">
           <Button variant="outline" asChild>
-            <Link href="/blog">بازگشت به وبلاگ</Link>
+            <Link to="/blog">بازگشت به وبلاگ</Link>
           </Button>
           <div className="text-sm text-muted-foreground">
             {formatJalali(post.published_at || post.created_at, false)}