feat: demo imporves

demo/nextjs/middleware.ts

@@ -1,9 +1,19 @@
 import { authMiddleware } from "better-auth/next-js";
+import { NextResponse } from "next/server";
 
 export default authMiddleware({
-	redirectTo: "/sign-in",
+	customRedirect: async (session, request) => {
+		const baseURL = request.nextUrl.origin;
+		if (request.nextUrl.pathname === "/sign-in" && session) {
+			return NextResponse.redirect(new URL("/dashboard", baseURL));
+		}
+		if (request.nextUrl.pathname === "/dashboard" && !session) {
+			return NextResponse.redirect(new URL("/sign-in", baseURL));
+		}
+		return NextResponse.next();
+	},
 });
 
 export const config = {
-	matcher: ["/dashboard"],
+	matcher: ["/dashboard", "/sign-in"],
 };