feat: refactor chat sharing implementation

app/share/[id]/page.tsx

@@ -0,0 +1,35 @@
+import { type Metadata } from 'next'
+import { auth } from '@clerk/nextjs'
+
+import { Chat } from '@/components/chat'
+import { getChat, getSharedChat } from '@/app/actions'
+import { notFound } from 'next/navigation'
+
+// export const runtime = 'edge'
+export const preferredRegion = 'home'
+
+export interface SharePageProps {
+  params: {
+    id: string
+  }
+}
+
+export async function generateMetadata({
+  params
+}: SharePageProps): Promise<Metadata> {
+  const { user } = await auth()
+  const chat = await getChat(params.id, user?.id ?? '')
+  return {
+    title: chat?.title.slice(0, 50) ?? 'Chat'
+  }
+}
+
+export default async function SharePage({ params }: SharePageProps) {
+  const chat = await getSharedChat(params.id)
+
+  if (!chat || !chat?.sharePath) {
+    notFound()
+  }
+
+  return <Chat id={chat.id} initialMessages={chat.messages} />
+}