fix(mp): T40 UI 审计修复 — 28 项设计系统合规 + 安全加固 + 讨论记录

T40 UI 审计修复（60 页面全覆盖）:
- 新增 $acc-d/$wrn-d 渐变中间色变量，修复首页轮播渐变硬编码
- 替换 8 处裸 white 为 $white 设计变量（5 个 SCSS 文件）
- 修复 7 处触摸目标 40/44px → 48px（健康/消息/咨询/预约/首页）
- 3 页面新增 Loading 状态（体征录入/个人中心/就诊人添加）
- statusTag 移除硬编码布局值，改用 SCSS mixin 控制
- 医生端 14 页面架构 Hook 层补充（useThrottledDidShow 替换 useEffect）
- 移除 action-inbox 未使用 import

安全 P0 修复:
- JWT 中间件加固：token 类型校验 + 过期预检 + 类型别名简化
- 速率限制增强：滑动窗口 + 暴力破解防护
- analytics handler 错误处理完善

文档:
- T40 审计报告（24 PASS / 36 PASS_WITH_ISSUES / 0 NEEDS_WORK）
- 5 份 DevTools/性能审计讨论记录
- wiki 症状导航 + 小程序章节更新

apps/miniprogram/src/pages/health/index.scss

@@ -29,7 +29,7 @@
 
 .vital-tab {
   flex: 1;
-  height: 40px;
+  height: 48px;
   border-radius: $r-sm;
   background: $surface-alt;
   @include flex-center;
@@ -273,8 +273,8 @@
 }
 
 .device-icon {
-  width: 44px;
-  height: 44px;
+  width: 48px;
+  height: 48px;
   border-radius: $r-sm;
   background: $pri-l;
   @include flex-center;

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

@@ -1,9 +1,10 @@
 import { useState, useEffect } from 'react';
 import { View, Text, Input } from '@tarojs/components';
-import Taro, { useDidShow, usePullDownRefresh } from '@tarojs/taro';
+import Taro, { usePullDownRefresh } from '@tarojs/taro';
 import { useHealthStore } from '../../stores/health';
 import { useAuthStore } from '../../stores/auth';
 import { useElderClass } from '../../hooks/useElderClass';
+import { useThrottledDidShow } from '@/hooks/useThrottledDidShow';
 import { inputVitalSign, getTrend, getHealthThresholds, findThreshold, DEFAULT_THRESHOLDS, type HealthThreshold } from '../../services/health';
 import { listPendingSuggestions, type AiSuggestionItem } from '../../services/ai-analysis';
 import Loading from '../../components/Loading';
@@ -41,8 +42,12 @@ interface TrendPoint {
 }
 
 export default function Health() {
-  const { todaySummary, loading, refreshToday, getTrend: fetchTrend } = useHealthStore();
-  const { user, currentPatient } = useAuthStore();
+  const todaySummary = useHealthStore((s) => s.todaySummary);
+  const loading = useHealthStore((s) => s.loading);
+  const refreshToday = useHealthStore((s) => s.refreshToday);
+  const fetchTrend = useHealthStore((s) => s.getTrend);
+  const user = useAuthStore((s) => s.user);
+  const currentPatient = useAuthStore((s) => s.currentPatient);
   const modeClass = useElderClass();
   const [activeTab, setActiveTab] = useState<VitalType>('blood_pressure');
   const [systolic, setSystolic] = useState('');
@@ -57,13 +62,16 @@ export default function Health() {
   const [aiSuggestions, setAiSuggestions] = useState<AiSuggestionItem[]>([]);
   const [thresholds, setThresholds] = useState<HealthThreshold[]>(DEFAULT_THRESHOLDS);
 
-  useDidShow(() => {
+  useThrottledDidShow(() => {
     if (!user) return;
-    refreshToday();
-    loadTrend(activeTab);
-    loadAiSuggestions();
-    getHealthThresholds().then((t) => { if (t.length > 0) setThresholds(t); });
-  });
+    // 批量发起请求，避免串行 setState 级联重渲染
+    Promise.allSettled([
+      refreshToday(),
+      loadTrend(activeTab),
+      loadAiSuggestions(),
+      getHealthThresholds().then((t) => { if (t.length > 0) setThresholds(t); }),
+    ]);
+  }, 5000);
 
   usePullDownRefresh(() => {
     if (!user) return;
@@ -202,7 +210,7 @@ export default function Health() {
     }
   };
 
-  const maxTrendValue = Math.max(...trendData.map((d) => d.value), 1);
+  const maxTrendValue = trendData.reduce((max, d) => Math.max(max, d.value), 1);
 
   const getThresholdValue = (type: VitalType, th: HealthThreshold[]): number | null => {
     if (type === 'blood_pressure') return findThreshold(th, 'systolic_bp', 'high')?.threshold_value ?? 140;
@@ -228,7 +236,7 @@ export default function Health() {
           } else if (first?.suggestion_type === 'followup') {
             Taro.navigateTo({ url: '/pages/pkg-profile/followups/index' });
           } else {
-            Taro.navigateTo({ url: '/pages/health/index' });
+            Taro.switchTab({ url: '/pages/health/index' });
           }
         }}>
           <View className='ai-card-header'>