feat: 实现 NoWhatever 别说随便餐厅决策 Web App

- Framer Motion 卡片滑动 UI，带物理阻尼动画
- 多人房间系统，4位房间号 + SWR 实时轮询
- 高德地图 POI v5 API 搜索附近餐厅
- Web Share API 一键邀请，剪贴板降级方案
- SQLite/Prisma 持久化存储
- 移动端优先响应式设计 (Tailwind CSS)

src/hooks/useRoomPolling.ts

@@ -0,0 +1,22 @@
+"use client";
+
+import useSWR from "swr";
+import { RoomStatus } from "@/types";
+
+const fetcher = (url: string) => fetch(url).then((r) => r.json());
+
+export function useRoomPolling(roomId: string) {
+  const { data, error, isLoading } = useSWR<RoomStatus>(
+    `/api/room/${roomId}`,
+    fetcher,
+    { refreshInterval: 1500, revalidateOnFocus: true },
+  );
+
+  return {
+    userCount: data?.userCount ?? 0,
+    match: data?.match ?? null,
+    restaurants: data?.restaurants ?? [],
+    isLoading,
+    error,
+  };
+}