fix(mp): P1+P2 稳定性加固 — 导航安全+生产日志+分包预加载+logout清理

P1:
- 全局 23 个页面 Taro.navigateTo → safeNavigateTo，防止页栈超10层
- 生产构建保留 console.warn/error，便于线上问题排查
- 添加 preloadRule 分包预加载（首页预加载健康/医生/文章分包）

P2:
- logout 时清理 ai_chat_history + BLE DataBuffer 缓存
- restore() 移除冗余的双重 Storage 读取（secureGet 已包含 getStorageSync）
- 首页文章图片添加 lazyLoad

apps/miniprogram/src/pages/pkg-health/alerts/index.tsx

@@ -1,6 +1,7 @@
 import React, { useState, useCallback } from 'react';
 import { View, Text } from '@tarojs/components';
 import Taro from '@tarojs/taro';
+import { safeNavigateTo } from '@/utils/navigate';
 import { usePageData } from '@/hooks/usePageData';
 import { listPatientAlerts, type Alert } from '@/services/alert';
 import { useAuthStore } from '@/stores/auth';
@@ -82,7 +83,7 @@ export default function PatientAlerts() {
   if (!currentPatient) {
     return (
       <PageShell padding="none" className={modeClass}>
-        <ErrorState text='请先完善个人档案' onRetry={() => Taro.navigateTo({ url: '/pages/pkg-profile/family-add/index' })} />
+        <ErrorState text='请先完善个人档案' onRetry={() => safeNavigateTo('/pages/pkg-profile/family-add/index')} />
       </PageShell>
     );
   }

apps/miniprogram/src/pages/pkg-health/input/index.tsx

@@ -1,6 +1,7 @@
 import { useState, useCallback } from 'react';
 import { View, Text, Input, Picker } from '@tarojs/components';
 import Taro from '@tarojs/taro';
+import { safeNavigateTo } from '@/utils/navigate';
 import { usePageData } from '@/hooks/usePageData';
 import { num, validateStr } from '@/utils/validate';
 import { inputVitalSign, getHealthThresholds, findThreshold, DEFAULT_THRESHOLDS, type HealthThreshold } from '../../../services/health';
@@ -193,7 +194,7 @@ export default function HealthInput() {
       </View>
 
       {/* 从设备同步入口 */}
-      <View className='input-sync-entry' onClick={() => Taro.navigateTo({ url: '/pages/pkg-health/device-sync/index?returnTo=input' })}>
+      <View className='input-sync-entry' onClick={() => safeNavigateTo('/pages/pkg-health/device-sync/index?returnTo=input')}>
         <Text className='input-sync-entry-text'>从设备同步</Text>
         <Text className='input-sync-entry-hint'>蓝牙连接设备自动获取数据</Text>
       </View>