Server mode against a real route

// apps/docs/examples/grid/server-orders.tsx'use client';
import '@workspace/active-grid/styles.css';
import {useCallback, useState} from 'react';import type {Order} from '@/lib/examples/orders';
import {  composePresentationContext,  toIanaTimeZone,} from '@workspace/active-format';import {  ActiveGrid,  createColumnHelper,  englishGridTranslator,  globalField,  scalarField,  type GridColumnDef,  type PagedResponse,  type ServerFetchFunction,} from '@workspace/active-grid';
const presentation = composePresentationContext(  'en-GB',  null,  toIanaTimeZone('Europe/Amsterdam'),);
const ch = createColumnHelper<Order>();// In server mode the column contract (`server`) declares what the server can// sort and filter; the grid offers exactly that, and nothing the server would// refuse.const columns: GridColumnDef<Order>[] = [  ch.accessor('id', {    header: 'Order',    meta: {filterType: 'text'},    server: {...scalarField(), global: globalField()},  }),  ch.accessor('customer', {    header: 'Customer',    meta: {filterType: 'text'},    server: {...scalarField(), global: globalField()},  }),  ch.accessor('category', {    header: 'Category',    meta: {filterType: 'select'},    server: {...scalarField(), global: globalField()},  }),  ch.accessor('total', {    header: 'Total',    type: 'currency',    meta: {currencyCode: 'EUR', filterType: 'number'},    server: scalarField(),  }),  ch.accessor('orderDate', {    header: 'Ordered',    type: 'date',    meta: {filterType: 'date'},    server: scalarField(),  }),  ch.accessor('status', {    header: 'Status',    meta: {filterType: 'select'},    server: scalarField(),  }),];
interface Exchange {  n: number;  request: string;  answer: string;}
/** * Server mode against a real route of this site. The browser sends the * grid's request (page, block size, sorting, filters, search); the server * filters, sorts and pages 5,000 orders and answers with one block. */export default function ServerOrders() {  const [log, setLog] = useState<Exchange[]>([]);  const fetchOrders = useCallback<ServerFetchFunction<Order>>(    async ({signal, ...params}) => {      const body = JSON.stringify(params);      const response = await fetch('/api/examples/grid/orders', {        method: 'POST',        headers: {'Content-Type': 'application/json'},        body,        signal,      });      const text = await response.text();      if (!response.ok) throw new Error(`The server refused: ${text}`);      const page = JSON.parse(text) as PagedResponse<Order>;      setLog((list) =>        [          {            n: (list[0]?.n ?? 0) + 1,            request: body,            answer: `${page.data.length} rows of ${page.totalCount}, ${(text.length / 1024).toFixed(1)} kB`,          },          ...list,        ].slice(0, 5),      );      return page;    },    [],  );  return (    <div className="flex flex-col gap-4">      <ActiveGrid<Order>        gridId="docs-server-orders"        mode="server"        fetchFn={fetchOrders}        columns={columns}        height={380}        locale={presentation}        t={englishGridTranslator}        pagination={{enabled: true, pageSizeOptions: [10, 25, 50]}}        toolbar={{search: {enabled: true}}}        serverOptions={{blockSize: 50, retryCount: 0}}      />      <section aria-label="Requests to the server" data-request-log>        <h3 className="mb-2 text-sm font-semibold">          Requests (POST /api/examples/grid/orders)        </h3>        <ol className="flex flex-col gap-2">          {log.map((exchange) => (            <li              key={exchange.n}              className="bg-muted rounded-md p-2 font-mono text-xs break-all"              data-request={exchange.n}            >              <div>                #{exchange.n} → {exchange.request}              </div>              <div className="text-muted-foreground">← {exchange.answer}</div>            </li>          ))}        </ol>      </section>    </div>  );}