feat(sharing): add email and message sharing functionality

app/[locale]/shared/[token]/page.tsx

@@ -0,0 +1,52 @@
+import { getTranslations } from "next-intl/server"
+import { getSharedEmail, getSharedEmailMessages } from "@/lib/shared-data"
+import { SharedErrorPage } from "@/components/emails/shared-error-page"
+import { SharedEmailPageClient } from "./page-client"
+
+interface PageProps {
+  params: Promise<{
+    token: string
+    locale: string
+  }>
+}
+
+export default async function SharedEmailPage({ params }: PageProps) {
+  const { token } = await params
+  const tShared = await getTranslations("emails.shared")
+  
+  // 服务端获取数据
+  const email = await getSharedEmail(token)
+  
+  if (!email) {
+    return (
+      <SharedErrorPage
+        title={tShared("emailNotFound")}
+        subtitle={tShared("linkExpired")}
+        error={tShared("linkInvalid")}
+        description={tShared("linkInvalidDescription")}
+        ctaText={tShared("createOwnEmail")}
+      />
+    )
+  }
+
+  // 获取初始消息列表
+  const messagesResult = await getSharedEmailMessages(token)
+
+  return (
+    <SharedEmailPageClient 
+      email={{
+        ...email,
+        createdAt: email.createdAt.toISOString(),
+        expiresAt: email.expiresAt.toISOString()
+      }}
+      initialMessages={messagesResult.messages.map(msg => ({
+        ...msg,
+        received_at: msg.received_at?.toISOString(),
+        sent_at: msg.sent_at?.toISOString()
+      }))}
+      initialNextCursor={messagesResult.nextCursor}
+      initialTotal={messagesResult.total}
+      token={token}
+    />
+  )
+}