refactor: use metadata export for seo

app/blog/page.tsx

@@ -2,9 +2,12 @@ import ListLayout from '@/layouts/ListLayout'
 import { sortedBlogPost } from 'pliny/utils/contentlayer'
 import { allBlogs } from 'contentlayer/generated'
 import type { Blog } from 'contentlayer/generated'
+import { genPageMetadata } from 'app/seo'
 
 const POSTS_PER_PAGE = 5
 
+export const metadata = genPageMetadata({ title: 'Blog' })
+
 export default function BlogPage() {
   const posts = sortedBlogPost(allBlogs) as Blog[]
   const pageNumber = 1