feat(hhrs): 开发文旅场馆、商户折扣、中奖名单三个H5页面

- 新增自定义导航栏（返回按钮 + 标题）
- 文旅场馆/商户折扣：搜索栏 + 卡片列表（缩略图/名称/分类/地址/距离）
- 中奖名单：公告区 + 统计卡片 + 三期Tab切换 + 中奖者表格
- pages.json 新增 navigationStyle: custom 配置
- common/http.api.js 新增 mp-api/hhrs 前缀接口占位

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pages.json

@@ -19,13 +19,15 @@
 		{
 			"path": "pages/venue/venue",
 			"style": {
-				"navigationBarTitleText": "文旅场馆"
+				"navigationBarTitleText": "文旅场馆",
+				"navigationStyle": "custom"
 			}
 		},
 		{
 			"path": "pages/discount/discount",
 			"style": {
-				"navigationBarTitleText": "商户折扣"
+				"navigationBarTitleText": "商户折扣",
+				"navigationStyle": "custom"
 			}
 		},
 		{
@@ -37,7 +39,8 @@
 		{
 			"path": "pages/winners/winners",
 			"style": {
-				"navigationBarTitleText": "中奖名单"
+				"navigationBarTitleText": "中奖名单",
+				"navigationStyle": "custom"
 			}
 		},
 		{