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/app/api/room/create/route.ts

@@ -1,6 +1,7 @@
 import { NextResponse } from "next/server";
 import { createRoom } from "@/lib/store";
-import { Restaurant } from "@/types";
+import { Restaurant, SceneType } from "@/types";
+import { getSceneConfig } from "@/lib/sceneConfig";
 
 interface AmapPoiV5 {
   id: string;
@@ -20,9 +21,6 @@ interface AmapPoiV5 {
   photos?: { url: string }[];
 }
 
-const DEFAULT_IMAGE =
-  "https://images.unsplash.com/photo-1517248135467-4c7edcad34c4?w=800&q=80";
-
 function extractCategory(type?: string): string {
   if (!type) return "";
   const parts = type.split(";");
@@ -35,7 +33,7 @@ function cleanField(val: unknown): string {
   return String(val);
 }
 
-function mapPoiToRestaurant(poi: AmapPoiV5): Restaurant {
+function mapPoiToRestaurant(poi: AmapPoiV5, defaultImage: string): Restaurant {
   const ratingStr = poi.business?.rating;
   const rating =
     ratingStr && ratingStr !== "[]" ? parseFloat(ratingStr) || 4.0 : 4.0;
@@ -47,7 +45,7 @@ function mapPoiToRestaurant(poi: AmapPoiV5): Restaurant {
   const image =
     poi.photos && poi.photos.length > 0 && poi.photos[0].url
       ? poi.photos[0].url
-      : DEFAULT_IMAGE;
+      : defaultImage;
 
   const openTime =
     cleanField(poi.business?.opentime_week) ||
@@ -81,10 +79,16 @@ function filterByPrice(
     if (isNaN(cost)) return true;
 
     switch (priceRange) {
+      case "under20":
+        return cost < 20;
       case "under50":
         return cost < 50;
+      case "20to50":
+        return cost >= 20 && cost <= 50;
       case "50to100":
         return cost >= 50 && cost <= 100;
+      case "over50":
+        return cost > 50;
       case "over100":
         return cost > 100;
       default:
@@ -103,8 +107,11 @@ export async function POST(req: Request) {
       priceRange = "any",
       cuisine = "不限",
       userId = "",
+      scene = "eat" as SceneType,
     } = body;
 
+    const sceneConfig = getSceneConfig(scene === "drink" ? "drink" : "eat");
+
     if (!lat || !lng) {
       return NextResponse.json(
         { error: "无法获取位置信息，请允许定位权限后重试" },
@@ -125,7 +132,7 @@ export async function POST(req: Request) {
     url.searchParams.set("key", apiKey);
     url.searchParams.set("location", `${lng},${lat}`);
     url.searchParams.set("radius", String(radius));
-    url.searchParams.set("types", "050000");
+    url.searchParams.set("types", sceneConfig.poiTypes);
     url.searchParams.set("show_fields", "business,photos");
     url.searchParams.set("sortrule", "weight");
 
@@ -141,24 +148,26 @@ export async function POST(req: Request) {
 
     let restaurants: Restaurant[] = [];
     if (amapData.status === "1" && amapData.pois?.length > 0) {
-      let results: Restaurant[] = amapData.pois.map(mapPoiToRestaurant);
+      let results: Restaurant[] = amapData.pois.map(
+        (poi: AmapPoiV5) => mapPoiToRestaurant(poi, sceneConfig.defaultImage),
+      );
       results = filterByPrice(results, priceRange);
       restaurants = results.slice(0, 15);
     }
 
     if (restaurants.length === 0) {
       return NextResponse.json(
-        { error: "附近没有找到餐厅，试试扩大搜索范围或换个菜系" },
+        { error: sceneConfig.emptyError },
         { status: 404 },
       );
     }
 
-    const roomId = await createRoom(restaurants, userId);
+    const roomId = await createRoom(restaurants, userId, sceneConfig.key);
     return NextResponse.json({ roomId, restaurants });
   } catch (e) {
     console.error("Failed to create room:", e);
     return NextResponse.json(
-      { error: "搜索餐厅失败，请检查网络后重试" },
+      { error: "搜索失败，请检查网络后重试" },
       { status: 500 },
     );
   }