fix build error

app/auth/signin/page.tsx

@@ -1,6 +1,6 @@
 "use client"
 
-import { useState, useEffect } from "react"
+import { useState, useEffect, Suspense } from "react"
 import { signIn, getProviders, useSession } from "next-auth/react"
 import { useRouter, useSearchParams } from "next/navigation"
 import { Button } from "@/components/ui/button"
@@ -11,7 +11,7 @@ import { Separator } from "@/components/ui/separator"
 import { Mail, Chrome } from "lucide-react"
 import { Alert, AlertDescription } from "@/components/ui/alert"
 
-export default function SignInPage() {
+function SignInContent() {
   const [email, setEmail] = useState("")
   const [isLoading, setIsLoading] = useState(false)
   const [message, setMessage] = useState("")
@@ -144,4 +144,23 @@ export default function SignInPage() {
       </Card>
     </div>
   )
+}
+
+export default function SignInPage() {
+  return (
+    <Suspense fallback={
+      <div className="min-h-screen flex items-center justify-center bg-gray-50">
+        <Card className="w-full max-w-md">
+          <CardContent className="flex items-center justify-center p-6">
+            <div className="text-center">
+              <div className="w-8 h-8 bg-gray-200 rounded-full animate-pulse mx-auto mb-2"></div>
+              <p className="text-sm text-muted-foreground">加载中...</p>
+            </div>
+          </CardContent>
+        </Card>
+      </div>
+    }>
+      <SignInContent />
+    </Suspense>
+  )
 }