feat: 体重管理模块交互完善—多状态卡片显隐、导航链路连通、SITE_MAP补全

- employee-app/home: 体重管理模块标题栏/卡片/功能列表入口指向weight-main.html
- basic-info: 返回按钮智能跳转，根据referrer判断来源
- goal-commitment: setGoalType改为URL参数跳转刷新，新增applyGoalTypeState函数
- goal-management: 7种状态新增hideActCard/hideSelfCard/showInfoCard字段控制卡片显隐，personal/只读态专属逻辑完善
- weight-main(新): 体重管理主入口页（英雄区/三态卡片/吃动平衡/体重记录/排行榜/推荐视频）
- balance-history(新): 吃动平衡历史页（月视图日历+柱状图+交互明细）
- index.html: entry改为weight-main.html，SITE_MAP补全promise-signing/my-promise/balance-history

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

index.html

@@ -563,13 +563,17 @@ const SITE_MAP = [
       { file:'report-query.html', label:'报告查询详情' },
       { file:'project-detail.html', label:'体检项目详情' }
     ] },
-    { name:'体重管理', dir:'employee-app/weight-management', entry:'goal-commitment.html', pages:[
+    { name:'体重管理', dir:'employee-app/weight-management', entry:'weight-main.html', pages:[
+      { file:'weight-main.html', label:'体重管理主页' },
       { file:'goal-commitment.html', label:'目标承诺' },
       { file:'basic-info.html', label:'基本信息' },
       { file:'indicators-diseases.html', label:'指标慢病' },
       { file:'goal-management.html', label:'目标管理' },
       { file:'activity-detail.html', label:'活动详情' },
-      { file:'contraindications.html', label:'禁忌证' }
+      { file:'contraindications.html', label:'禁忌证' },
+      { file:'promise-signing.html', label:'承诺签订' },
+      { file:'my-promise.html', label:'我的承诺书' },
+      { file:'balance-history.html', label:'吃动平衡历史' }
     ] },
     { name:'营养管理', dir:'employee-app/nutrition', pages:[] },
     { name:'运动管理', dir:'employee-app/exercise', pages:[] },