wechat-radar/app/api/topics/route.ts

import { NextRequest, NextResponse } from 'next/server';
import { listTopics } from '@/lib/topics';
import { todayStr } from '@/lib/range';

export const dynamic = 'force-dynamic';

export async function GET(req: NextRequest) {
  const url = new URL(req.url);
  const date = url.searchParams.get('date') ?? todayStr();
  const topics = listTopics(date);
  return NextResponse.json({ ok: true, date, topics });
}