fix: 全面修复 - 实时通讯、报告AI流程、健康概览、用药运动提醒

- SignalR Hub消息持久化+防重复+跨端广播
- 报告VLM+LLM真实AI流程(验证→提取→解读)
- 医生审核页重构(严重程度/建议模板/综合评语)
- 健康概览五合一趋势图(fl_chart+指标切换)
- 用药提醒时区修复+跨午夜+过期提醒
- 运动打卡DayOfWeek映射修复+计划覆盖查询
- 体重与其他四指标同级(Abnormal检查/确认卡牌)
- AI Agent支持多种类多时段批量录入
- 删除硬编码假数据(张三/假医生/假AI解读)
- 随访/报告审核数据链路全部打通

health_app/lib/pages/home/home_page.dart

@@ -85,7 +85,7 @@ class _HomePageState extends ConsumerState<HomePage> {
         Expanded(child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
           Row(mainAxisSize: MainAxisSize.min, children: [Icon(Icons.smart_toy_outlined, size: 16, color: const Color(0xFF8B9CF7)), const SizedBox(width: 4), Text('AI 健康管家', style: TextStyle(fontSize: 13, fontWeight: FontWeight.w500, color: Colors.grey[600]))]),
           const SizedBox(height: 2),
-          Text('${_getGreeting()}，${user?.name ?? '张三'}！', style: const TextStyle(fontSize: 17, fontWeight: FontWeight.bold, color: Color(0xFF1A1A1A))),
+          Text('${_getGreeting()}，${(user?.name != null && user!.name!.isNotEmpty) ? user.name : '用户'}！', style: const TextStyle(fontSize: 17, fontWeight: FontWeight.bold, color: Color(0xFF1A1A1A))),
         ])),
         Icon(Icons.notifications_none, size: 22, color: Colors.grey[600]),
       ]),