feat: support memory import and export (#1521)

* feat: support memory import and export

* fix(memory): address review feedback

* style: format memory settings page

---------

Co-authored-by: Willem Jiang <willem.jiang@gmail.com>

frontend/src/app/api/memory/[...path]/route.ts

@@ -0,0 +1,55 @@
+import type { NextRequest } from "next/server";
+
+const BACKEND_BASE_URL =
+  process.env.NEXT_PUBLIC_BACKEND_BASE_URL ?? "http://127.0.0.1:8001";
+
+function buildBackendUrl(pathname: string) {
+  return new URL(pathname, BACKEND_BASE_URL);
+}
+
+async function proxyRequest(request: NextRequest, pathname: string) {
+  const headers = new Headers(request.headers);
+  headers.delete("host");
+  headers.delete("connection");
+  headers.delete("content-length");
+
+  const hasBody = !["GET", "HEAD"].includes(request.method);
+  const response = await fetch(buildBackendUrl(pathname), {
+    method: request.method,
+    headers,
+    body: hasBody ? await request.arrayBuffer() : undefined,
+  });
+
+  return new Response(await response.arrayBuffer(), {
+    status: response.status,
+    headers: response.headers,
+  });
+}
+
+export async function GET(
+  request: NextRequest,
+  { params }: { params: Promise<{ path: string[] }> },
+) {
+  return proxyRequest(request, `/api/memory/${(await params).path.join("/")}`);
+}
+
+export async function POST(
+  request: NextRequest,
+  { params }: { params: Promise<{ path: string[] }> },
+) {
+  return proxyRequest(request, `/api/memory/${(await params).path.join("/")}`);
+}
+
+export async function DELETE(
+  request: NextRequest,
+  { params }: { params: Promise<{ path: string[] }> },
+) {
+  return proxyRequest(request, `/api/memory/${(await params).path.join("/")}`);
+}
+
+export async function PATCH(
+  request: NextRequest,
+  { params }: { params: Promise<{ path: string[] }> },
+) {
+  return proxyRequest(request, `/api/memory/${(await params).path.join("/")}`);
+}