feat: Implement role-based access control and enhance permissions system

app/moe/no-permission/page.tsx

@@ -0,0 +1,24 @@
+import { Header } from "@/components/layout/header"
+import { Button } from "@/components/ui/button"
+import { Crown } from "lucide-react"
+import Link from "next/link"
+
+export default function NoPermissionPage() {
+  return (
+    <div className="bg-gradient-to-b from-gray-50 to-gray-100 dark:from-gray-900 dark:to-gray-800 h-screen">
+      <div className="container mx-auto h-full px-4 lg:px-8 max-w-[1600px]">
+        <Header />
+        <main className="h-full flex items-center justify-center">
+          <div className="text-center space-y-4">
+            <Crown className="w-12 h-12 text-primary mx-auto" />
+            <h1 className="text-2xl font-bold">权限不足</h1>
+            <p className="text-muted-foreground">你没有权限访问此页面，请联系皇帝</p>
+            <Link href="/">
+              <Button>返回首页</Button>
+            </Link>
+          </div>
+        </main>
+      </div>
+    </div>
+  )
+} 

app/moe/page.tsx

@@ -1,23 +1,29 @@
 import { Header } from "@/components/layout/header"
 import { ThreeColumnLayout } from "@/components/emails/three-column-layout"
+import { NoPermissionDialog } from "@/components/no-permission-dialog"
 import { auth } from "@/lib/auth"
 import { redirect } from "next/navigation"
+import { checkPermission } from "@/lib/auth"
+import { PERMISSIONS } from "@/lib/permissions"
 
 export const runtime = "edge"
 
 export default async function MoePage() {
   const session = await auth()
   
-  if (!session) {
+  if (!session?.user) {
     redirect("/")
   }
 
+  const hasPermission = await checkPermission(PERMISSIONS.MANAGE_EMAIL)
+
   return (
     <div className="bg-gradient-to-b from-gray-50 to-gray-100 dark:from-gray-900 dark:to-gray-800 h-screen">
       <div className="container mx-auto h-full px-4 lg:px-8 max-w-[1600px]">
         <Header />
         <main className="h-full">
           <ThreeColumnLayout />
+          {!hasPermission && <NoPermissionDialog />}
         </main>
       </div>
     </div>