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/pkg-mall/detail/index.tsx

@@ -1,6 +1,7 @@
 import React, { useState, useCallback, useRef } from 'react';
 import { View, Text } from '@tarojs/components';
-import Taro, { useDidShow, useReachBottom, usePullDownRefresh } from '@tarojs/taro';
+import Taro, { useReachBottom, usePullDownRefresh } from '@tarojs/taro';
+import { useThrottledDidShow } from '@/hooks/useThrottledDidShow';
 import { listMyTransactions } from '../../../services/points';
 import type { PointsTransaction } from '../../../services/points';
 import { usePointsStore } from '../../../stores/points';
@@ -17,7 +18,8 @@ const TYPE_TABS = [
 
 export default function PointsDetail() {
   const modeClass = useElderClass();
-  const { account, refresh: refreshPoints } = usePointsStore();
+  const account = usePointsStore((s) => s.account);
+  const refreshPoints = usePointsStore((s) => s.refresh);
   const [transactions, setTransactions] = useState<PointsTransaction[]>([]);
   const [activeTab, setActiveTab] = useState('');
   const [page, setPage] = useState(1);
@@ -64,10 +66,10 @@ export default function PointsDetail() {
     [refreshPoints, fetchTransactions, activeTab],
   );
 
-  useDidShow(() => {
+  useThrottledDidShow(() => {
     Taro.setNavigationBarTitle({ title: '积分明细' });
     loadAll();
-  });
+  }, 10000);
 
   usePullDownRefresh(() => {
     loadAll().finally(() => {

apps/miniprogram/src/pages/pkg-mall/exchange/index.scss

@@ -196,6 +196,6 @@
 
 .confirm-btn-text {
   font-size: var(--tk-font-num);
-  color: white;
+  color: $white;
   font-weight: bold;
 }

apps/miniprogram/src/pages/pkg-mall/exchange/index.tsx

@@ -1,6 +1,7 @@
 import React, { useState, useCallback } from 'react';
 import { View, Text } from '@tarojs/components';
-import Taro, { useDidShow } from '@tarojs/taro';
+import Taro from '@tarojs/taro';
+import { useThrottledDidShow } from '@/hooks/useThrottledDidShow';
 import {
   listProducts,
   exchangeProduct,
@@ -32,14 +33,15 @@ const TYPE_CLASS: Record<string, string> = {
 export default function ExchangeConfirm() {
   const modeClass = useElderClass();
   const [product, setProduct] = useState<PointsProduct | null>(null);
-  const { account, refresh: refreshPoints } = usePointsStore();
+  const account = usePointsStore((s) => s.account);
+  const refreshPoints = usePointsStore((s) => s.refresh);
   const [loading, setLoading] = useState(true);
   const [submitting, setSubmitting] = useState(false);
 
-  useDidShow(() => {
+  useThrottledDidShow(() => {
     Taro.setNavigationBarTitle({ title: '确认兑换' });
     loadData();
-  });
+  }, 10000);
 
   const loadData = useCallback(async () => {
     const instance = Taro.getCurrentInstance();
@@ -101,7 +103,7 @@ export default function ExchangeConfirm() {
           showCancel: false,
           confirmText: '查看订单',
           success: () => {
-            Taro.navigateTo({
+            Taro.redirectTo({
               url: `/pages/pkg-mall/orders/index`,
             });
           },

apps/miniprogram/src/pages/pkg-mall/orders/index.tsx

@@ -1,6 +1,7 @@
 import React, { useState, useCallback, useRef } from 'react';
 import { View, Text } from '@tarojs/components';
-import Taro, { useDidShow, useReachBottom, usePullDownRefresh } from '@tarojs/taro';
+import Taro, { useReachBottom, usePullDownRefresh } from '@tarojs/taro';
+import { useThrottledDidShow } from '@/hooks/useThrottledDidShow';
 import { listMyOrders } from '../../../services/points';
 import type { PointsOrder } from '../../../services/points';
 import EmptyState from '../../../components/EmptyState';
@@ -70,10 +71,10 @@ export default function MallOrders() {
     [fetchOrders, activeTab],
   );
 
-  useDidShow(() => {
+  useThrottledDidShow(() => {
     Taro.setNavigationBarTitle({ title: '我的订单' });
     loadAll();
-  });
+  }, 10000);
 
   usePullDownRefresh(() => {
     loadAll().finally(() => {
@@ -133,7 +134,7 @@ export default function MallOrders() {
           text='暂无订单'
           hint='去商城兑换心仪商品吧'
           actionText='去商城'
-          onAction={() => Taro.redirectTo({ url: '/pages/mall/index' })}
+          onAction={() => Taro.switchTab({ url: '/pages/mall/index' })}
         />
       ) : (
         <View className='order-list'>