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/lib/store.ts

@@ -0,0 +1,61 @@
+import { prisma } from "./prisma";
+import { Restaurant } from "@/types";
+
+export interface RoomData {
+  users: string[];
+  restaurants: Restaurant[];
+  likes: Record<string, string[]>;
+  match: string | null;
+}
+
+function generateRoomId(): string {
+  return String(Math.floor(1000 + Math.random() * 9000));
+}
+
+export async function createRoom(restaurants: Restaurant[]): Promise<string> {
+  const data: RoomData = {
+    users: [],
+    restaurants,
+    likes: {},
+    match: null,
+  };
+
+  let roomId: string;
+  let attempts = 0;
+
+  while (attempts < 20) {
+    roomId = generateRoomId();
+    const existing = await prisma.room.findUnique({ where: { id: roomId } });
+    if (!existing) {
+      await prisma.room.create({
+        data: { id: roomId, data: JSON.stringify(data) },
+      });
+      return roomId;
+    }
+    attempts++;
+  }
+
+  roomId = generateRoomId() + String(Date.now()).slice(-2);
+  await prisma.room.create({
+    data: { id: roomId, data: JSON.stringify(data) },
+  });
+  return roomId;
+}
+
+export async function getRoomData(
+  roomId: string,
+): Promise<RoomData | null> {
+  const room = await prisma.room.findUnique({ where: { id: roomId } });
+  if (!room) return null;
+  return JSON.parse(room.data) as RoomData;
+}
+
+export async function updateRoomData(
+  roomId: string,
+  data: RoomData,
+): Promise<void> {
+  await prisma.room.update({
+    where: { id: roomId },
+    data: { data: JSON.stringify(data) },
+  });
+}