fix(miniprogram): 多角色找茬模式发现并修复 16 个问题

P0 Bug:
- 健康 AI 建议幽灵路径 pkg-appointment → appointment/create
- 血糖 indicator_type 始终 blood_sugar，不区分空腹/餐后
- 商城订单页 switchTab 跳转非 TabBar 页面

P1 设计系统:
- Profile/Index 页 emoji 图标替换为衬线首字
- Profile 硬编码颜色替换为 SCSS 变量 class
- alerts/action-inbox 两个页面全面接入设计系统
- ai-report/detail 删除重复 mixin 定义
- ErrorBoundary 添加重试按钮移除 emoji
- 新增 $r-xs: 8px 圆角变量

P1 导航/交互:
- Profile 补充 4 个缺失菜单（透析/知情同意/用药/活动）
- Settings 隐私政策改为跳转实际页面
- 全局启用 enablePullDownRefresh
- 首页/健康页添加下拉刷新
- 咨询/消息列表添加分页加载更多
- 医生端患者列表改为上拉加载
- 首页/健康页间距统一为 24px

apps/miniprogram/src/pages/consultation/index.tsx

@@ -1,6 +1,6 @@
-import { useState } from 'react';
+import { useState, useRef } from 'react';
 import { View, Text } from '@tarojs/components';
-import Taro, { useDidShow, usePullDownRefresh } from '@tarojs/taro';
+import Taro, { useDidShow, usePullDownRefresh, useReachBottom } from '@tarojs/taro';
 import { listConsultations, ConsultationSession } from '@/services/consultation';
 import Loading from '../../components/Loading';
 import './index.scss';
@@ -33,32 +33,51 @@ export default function Consultation() {
   const [sessions, setSessions] = useState<ConsultationSession[]>([]);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState('');
+  const [page, setPage] = useState(1);
+  const [total, setTotal] = useState(0);
+  const loadingRef = useRef(false);
 
-  const loadSessions = async () => {
-    setLoading(true);
+  const loadSessions = async (pageNum: number, isRefresh = false) => {
+    if (loadingRef.current) return;
+    loadingRef.current = true;
+    if (isRefresh) setLoading(true);
     setError('');
     try {
-      const resp = await listConsultations({ page: 1, page_size: 20 });
-      setSessions(resp.data || []);
+      const resp = await listConsultations({ page: pageNum, page_size: 20 });
+      const list = resp.data || [];
+      if (isRefresh) {
+        setSessions(list);
+      } else {
+        setSessions((prev) => [...prev, ...list]);
+      }
+      setTotal(resp.total || 0);
+      setPage(pageNum);
     } catch (e: unknown) {
       const msg = e instanceof Error ? e.message : '加载失败';
       setError(msg);
     } finally {
       setLoading(false);
+      loadingRef.current = false;
     }
   };
 
   useDidShow(() => {
     Taro.setNavigationBarTitle({ title: '在线咨询' });
-    loadSessions();
+    loadSessions(1, true);
   });
 
   usePullDownRefresh(() => {
-    loadSessions().finally(() => {
+    loadSessions(1, true).finally(() => {
       Taro.stopPullDownRefresh();
     });
   });
 
+  useReachBottom(() => {
+    if (!loading && sessions.length < total) {
+      loadSessions(page + 1);
+    }
+  });
+
   const handleTapSession = (session: ConsultationSession) => {
     Taro.navigateTo({ url: `/pages/consultation/detail/index?id=${session.id}` });
   };