feat(content): add announcements and public news flows

apps/web/src/app/[locale]/news/[slug]/page.tsx

@@ -0,0 +1,30 @@
+import { getPostBySlug } from "@cms/db"
+import { notFound } from "next/navigation"
+
+export const dynamic = "force-dynamic"
+
+type PageProps = {
+  params: Promise<{ slug: string }>
+}
+
+export default async function PublicNewsDetailPage({ params }: PageProps) {
+  const { slug } = await params
+  const post = await getPostBySlug(slug)
+
+  if (!post || post.status !== "published") {
+    notFound()
+  }
+
+  return (
+    <article className="mx-auto w-full max-w-4xl space-y-4 px-6 py-16">
+      <header className="space-y-2">
+        <p className="text-sm uppercase tracking-[0.2em] text-neutral-500">News</p>
+        <h1 className="text-4xl font-semibold tracking-tight">{post.title}</h1>
+        {post.excerpt ? <p className="text-neutral-600">{post.excerpt}</p> : null}
+      </header>
+      <section className="prose prose-neutral max-w-none whitespace-pre-wrap rounded-xl border border-neutral-200 bg-white p-6 text-neutral-800">
+        {post.body}
+      </section>
+    </article>
+  )
+}