feat: 新增「喝什么」场景，支持奶茶/咖啡/酒吧等饮品店搜索

引入场景系统(SceneType)，首页增加「吃什么」「喝什么」切换 Tab，
不同场景使用不同的高德 POI 类型、热门标签、价格区间和全链路文案。
场景信息存储在房间数据中，邀请/分享/匹配结果等页面自动适配。

src/components/QrInviteModal.tsx

@@ -4,12 +4,15 @@ import { useCallback, useRef } from "react";
 import { motion, AnimatePresence } from "framer-motion";
 import { QRCodeSVG } from "qrcode.react";
 import { X, Copy, Share2, QrCode } from "lucide-react";
+import type { SceneType } from "@/types";
+import { getSceneConfig } from "@/lib/sceneConfig";
 
 interface QrInviteModalProps {
   open: boolean;
   onClose: () => void;
   roomId: string;
   onToast: (msg: string) => void;
+  scene?: SceneType;
 }
 
 export default function QrInviteModal({
@@ -17,7 +20,9 @@ export default function QrInviteModal({
   onClose,
   roomId,
   onToast,
+  scene = "eat",
 }: QrInviteModalProps) {
+  const sceneConfig = getSceneConfig(scene);
   const inviteUrl =
     typeof window !== "undefined"
       ? `${window.location.origin}/invite/${roomId}`
@@ -39,8 +44,8 @@ export default function QrInviteModal({
 
   const handleShare = useCallback(async () => {
     const shareData = {
-      title: "别说随便啦，来滑卡片决定吃什么！",
-      text: "我建好房间了，快点开链接一起选餐厅，滑中同一家就去吃！",
+      title: sceneConfig.shareTitle,
+      text: sceneConfig.shareText,
       url: inviteUrl,
     };
 
@@ -54,7 +59,7 @@ export default function QrInviteModal({
     }
 
     handleCopy();
-  }, [inviteUrl, handleCopy]);
+  }, [inviteUrl, handleCopy, sceneConfig]);
 
   return (
     <AnimatePresence>
@@ -88,7 +93,7 @@ export default function QrInviteModal({
                 <h2 className="text-lg font-bold">邀请饭搭子</h2>
               </div>
               <p className="mt-1 text-xs text-zinc-400">
-                让朋友扫码加入房间，一起滑卡片选餐厅
+                {sceneConfig.qrSubtitle}
               </p>
 
               <div className="mt-5 rounded-2xl border-2 border-dashed border-emerald-200 bg-emerald-50/30 p-4">