refactor: Migrate OAuth state management to API-based approach

src/app/(auth)/authorize/page.tsx

@@ -23,7 +23,9 @@ export default function AuthPage({ searchParams }: Props) {
         // 解码 OAuth 参数
         const params = JSON.parse(atob(oauthState));
         // 删除 cookie
-        Cookies.remove("oauth_state", { path: "/" });
+        fetch("/api/auth/oauth-state", { method: "DELETE" }).catch(
+          console.error,
+        );
         // 构建重定向 URL
         const searchParams = new URLSearchParams(params);
         router.push(`/oauth/authorize?${searchParams.toString()}`);

src/app/(auth)/sign-in/page.tsx

@@ -1,4 +1,6 @@
-import { Suspense } from "react";
+"use client";
+
+import { useEffect } from "react";
 import { Metadata } from "next";
 import Link from "next/link";
 import { ChevronLeft, MessageCircleCode } from "lucide-react";
@@ -7,12 +9,29 @@ import { cn } from "@/lib/utils";
 import { buttonVariants } from "@/components/ui/button";
 import { UserAuthForm } from "@/components/auth/user-auth-form";
 
+interface Props {
+  searchParams: { state?: string };
+}
+
 export const metadata: Metadata = {
   title: "Login",
   description: "Login to your account",
 };
 
-export default function LoginPage() {
+export default function LoginPage({ searchParams }: Props) {
+  useEffect(() => {
+    // 如果有 state 参数，保存到 cookie
+    if (searchParams.state) {
+      fetch("/api/auth/oauth-state", {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+        },
+        body: JSON.stringify({ state: searchParams.state }),
+      }).catch(console.error);
+    }
+  }, [searchParams.state]);
+
   return (
     <>
       <Link
@@ -35,9 +54,7 @@ export default function LoginPage() {
             <span style={{ fontFamily: "Bahamas Bold" }}>Q58 Connect</span>
           </div>
         </div>
-        <Suspense>
-          <UserAuthForm />
-        </Suspense>
+        <UserAuthForm />
         <p className="px-8 text-center text-sm text-muted-foreground">
           By clicking continue, you agree to our{" "}
           <Link

src/app/(oauth)/oauth/authorize/page.tsx

@@ -1,4 +1,3 @@
-import { cookies } from "next/headers";
 import { redirect } from "next/navigation";
 
 import { getClientByClientId } from "@/lib/dto/client";
@@ -22,15 +21,10 @@ export default async function OAuthAuthorization({
   // 检查用户是否已登录
   const user = await getCurrentUser();
   if (!user?.id) {
-    // 将 OAuth 参数保存到 cookie
+    // 将 OAuth 参数编码为 base64
     const encodedParams = btoa(JSON.stringify(searchParams));
-    cookies().set("oauth_state", encodedParams, {
-      maxAge: 60 * 10, // 10分钟过期
-      path: "/",
-      httpOnly: true,
-      secure: process.env.NODE_ENV === "production",
-    });
-    redirect("/sign-in");
+    // 重定向到登录页面，将 OAuth 参数作为查询参数传递
+    redirect(`/sign-in?state=${encodedParams}`);
   }
 
   // 验证必要的参数

src/app/api/auth/oauth-state/route.ts

@@ -0,0 +1,25 @@
+import { cookies } from "next/headers";
+import { NextResponse } from "next/server";
+
+export async function POST(req: Request) {
+  try {
+    const { state } = await req.json();
+    cookies().set("oauth_state", state, {
+      maxAge: 60 * 10, // 10分钟过期
+      path: "/",
+      httpOnly: true,
+      secure: process.env.NODE_ENV === "production",
+    });
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    return NextResponse.json(
+      { error: "Failed to save state" },
+      { status: 500 },
+    );
+  }
+}
+
+export async function DELETE() {
+  cookies().delete("oauth_state");
+  return NextResponse.json({ success: true });
+}