msgapp/src/app/boards/[id]/page.tsx

import { PostList } from "@/app/components/PostList";
import { HeroBanner } from "@/app/components/HeroBanner";
import { headers } from "next/headers";

// Next 15: params/searchParams가 Promise가 될 수 있어 안전 언랩 처리합니다.
export default async function BoardDetail({ params, searchParams }: { params: any; searchParams: any }) {
  const p = params?.then ? await params : params;
  const sp = searchParams?.then ? await searchParams : searchParams;
  const id = p.id as string;
  const sort = (sp?.sort as "recent" | "popular" | undefined) ?? "recent";
  // 보드 slug 조회 (새 글 페이지 프리셋 전달)
  const h = await headers();
  const host = h.get("host") ?? "localhost:3000";
  const proto = h.get("x-forwarded-proto") ?? "http";
  const base = process.env.NEXT_PUBLIC_BASE_URL || `${proto}://${host}`;
  const res = await fetch(new URL("/api/boards", base).toString(), { cache: "no-store" });
  const { boards } = await res.json();
  const board = (boards || []).find((b: any) => b.id === id);
  const siblingBoards = (boards || []).filter((b: any) => b.category?.id && b.category.id === board?.category?.id);
  const categoryName = board?.category?.name ?? "";
  return (
    <div className="space-y-6">
      {/* 상단 배너 (홈과 동일) */}
      <section>
        <HeroBanner />
      </section>

      {/* 보드 탭 + 리스트 카드 */}
      <section className="rounded-xl overflow-hidden bg-white">
        {/* 상단 탭 영역 */}
        <div className="px-4 py-2 border-b border-neutral-200">
          <div className="flex items-center justify-between gap-3">
            <div className="flex items-center gap-2 overflow-x-auto flex-1">
              <span className="shrink-0 text-sm text-neutral-500">{categoryName}</span>
              {siblingBoards.map((b: any) => (
                <a
                  key={b.id}
                  href={`/boards/${b.id}`}
                  className={`shrink-0 whitespace-nowrap text-xs px-3 py-1 rounded-full border transition-colors ${
                    b.id === id
                      ? "bg-neutral-900 text-white border-neutral-900"
                      : "bg-white text-neutral-700 border-neutral-300 hover:bg-neutral-100"
                  }`}
                >
                  {b.name}
                </a>
              ))}
            </div>
            <a
              href={`/posts/new?boardId=${id}${board?.slug ? `&boardSlug=${board.slug}` : ""}`}
              className="shrink-0"
            >
              <button className="h-9 px-4 rounded-md bg-neutral-900 text-white text-sm hover:bg-neutral-800">새 글</button>
            </a>
          </div>
        </div>

        {/* 리스트 */}
        <div className="p-0">
          <PostList boardId={id} sort={sort} />
        </div>
      </section>
    </div>
  );
}