feat: 健康录入提醒 + 多指标异常 + 用药漏服 + UI 优化

后端
- NotificationPreference 增加健康录入提醒总开关和 5 子项（血压/心率/血糖/血氧/体重）
- EF 迁移 AddHealthRecordReminder
- 新增 GET/PUT /api/notification-prefs
- 新增 HealthRecordReminderService 每天 9 点/12 点扫描未录入用户推送提醒

前端
- 通知偏好对接真实后端 API
- 设置页新增「健康录入提醒」总开关+5 子项
- 通知中心右上角加齿轮跳设置页
- 今日健康卡片：4 项异常检测+多项合并；用药只显漏服并按时间窗口区分文案
- 侧边栏头像改圆形白底灰图标，去掉紫色品牌渐变
- 整体背景统一浅灰白 #F6F8FC，去掉浅紫渐变
- 设置页简化（去掉分组/彩色图标方块）
- 健康档案保存按钮移到右上角，TextButton 全局默认黑色
- API baseUrl 跟随网络环境

health_app/lib/pages/medication/medication_list_page.dart

@@ -67,8 +67,8 @@ class _MedicationListPageState extends ConsumerState<MedicationListPage>
           preferredSize: const Size.fromHeight(48),
           child: TabBar(
             controller: _tabCtrl,
-            indicatorColor: AppColors.primary,
-            labelColor: AppColors.primary,
+            indicatorColor: AppColors.textPrimary,
+            labelColor: AppColors.textPrimary,
             unselectedLabelColor: AppColors.textHint,
             labelStyle: const TextStyle(
               fontSize: 15,
@@ -84,9 +84,7 @@ class _MedicationListPageState extends ConsumerState<MedicationListPage>
         shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
         child: const Icon(Icons.add, size: 28, color: Colors.white),
       ),
-      body: Container(
-        decoration: const BoxDecoration(gradient: AppColors.bgGradient),
-        child: AppFutureView<List<Map<String, dynamic>>>(
+      body: AppFutureView<List<Map<String, dynamic>>>(
           future: _future,
           onRetry: _load,
           errorTitle: '用药信息加载失败',
@@ -121,10 +119,15 @@ class _MedicationListPageState extends ConsumerState<MedicationListPage>
                   child: Container(
                     padding: const EdgeInsets.all(AppTheme.sLg),
                     decoration: BoxDecoration(
-                      gradient: AppColors.surfaceGradient,
+                      color: Colors.white,
                       borderRadius: BorderRadius.circular(AppTheme.rLg),
-                      border: Border.all(color: AppColors.borderLight),
-                      boxShadow: AppColors.cardShadowLight,
+                      boxShadow: [
+                        BoxShadow(
+                          color: const Color(0xFF101828).withValues(alpha: 0.08),
+                          blurRadius: 18,
+                          offset: const Offset(0, 6),
+                        ),
+                      ],
                     ),
                     child: Row(
                       children: [
@@ -207,7 +210,6 @@ class _MedicationListPageState extends ConsumerState<MedicationListPage>
             );
           },
         ),
-      ),
     );
   }
 }