feat: v1 — persistent shell, model gateway, artifact improvements (#1462)

app/(auth)/api/auth/[...nextauth]/route.ts

@@ -0,0 +1 @@
+export { GET, POST } from "@/app/(auth)/auth";

app/(auth)/api/auth/guest/route.ts

@@ -0,0 +1,26 @@
+import { NextResponse } from "next/server";
+import { getToken } from "next-auth/jwt";
+import { signIn } from "@/app/(auth)/auth";
+import { isDevelopmentEnvironment } from "@/lib/constants";
+
+export async function GET(request: Request) {
+  const { searchParams } = new URL(request.url);
+  const rawRedirect = searchParams.get("redirectUrl") || "/";
+  const redirectUrl =
+    rawRedirect.startsWith("/") && !rawRedirect.startsWith("//")
+      ? rawRedirect
+      : "/";
+
+  const token = await getToken({
+    req: request,
+    secret: process.env.AUTH_SECRET,
+    secureCookie: !isDevelopmentEnvironment,
+  });
+
+  if (token) {
+    const base = process.env.NEXT_PUBLIC_BASE_PATH ?? "";
+    return NextResponse.redirect(new URL(`${base}/`, request.url));
+  }
+
+  return signIn("guest", { redirect: true, redirectTo: redirectUrl });
+}