feat: add static tag pages

app/posts/[slug]/page.tsx

@@ -4,11 +4,12 @@ import { TableOfContents } from '@/components/blog/TableOfContents'
 import { ScrollToTop } from '@/components/ui/ScrollToTop'
 import { ReadingProgress } from '@/components/ui/ReadingProgress'
 
+export const dynamicParams = false
+export const dynamic = 'force-static'
+export const revalidate = 0
+
 export async function generateStaticParams() {
   const posts = await getPosts()
-  if (posts.length === 0) {
-    return [{ slug: '__placeholder__' }]
-  }
   return posts.map((post) => ({ slug: post.slug }))
 }