fix(frontend): add blog admin preview route

src/views/AdminBlog.tsx

@@ -146,7 +146,7 @@ export default function AdminBlog() {
               <div key={post.id} className="flex flex-col gap-3 rounded-2xl border p-4 md:flex-row md:items-center md:justify-between">
                 <div className="flex flex-wrap gap-2">
                   <Button variant="outline" size="sm" asChild>
-                    <Link to={`/blog/${post.slug}`}><Eye className="ml-2 h-4 w-4" />مشاهده</Link>
+                    <Link to={`/admin/blog/${post.id}/preview`}><Eye className="ml-2 h-4 w-4" />پیش‌نمایش</Link>
                   </Button>
                   <Button variant="secondary" size="sm" asChild>
                     <Link to={`/admin/blog/${post.id}/edit`}><Edit className="ml-2 h-4 w-4" />ویرایش</Link>