feat: 二级页面色彩刷新 + 用药/通知/设备重构 + 后端健康档案/通知管线增强 + 大量测试

## 后端
- 健康档案: 新增手术状态字段 + EF 迁移; HealthArchiveService 新增查询方法
- 健康记录: HealthRecordService 新增批量/统计方法; 契约扩展
- 用药: 新增 MedicationScheduleStatus 枚举; MedicationService 排班逻辑调整
- 通知: EfUserNotificationPipeline 重构; 新增 EfReminderCatchUpService; 通知管线支持更多场景
- 用户: UserService 账号删除逻辑; 新增 local_account_file_cleanup; EfUserRepository 扩展
- AI: medication_agent_handler 微调; prompt_manager 优化; AiConversationService 上下文处理
- Endpoint: doctor/medication/exercise/health/notification/user 等多接口调整
- BackgroundService: health_record_reminder_service 重构, 提醒补漏逻辑
- 测试: 新增 account_deletion/doctor_endpoint/medication_schedule/medication_update/prompt_manager 测试

## 前端
- UI 系统: app_theme 大幅重构; app_colors/app_design_tokens/app_module_visuals 调整; 二级页面色彩刷新
- 主页: home_page 背景渐变 + 消息列表提取 _HomeMessages + 通知检查逻辑; chat_messages_view 全面重构
- 用药: medication_list/edit/checkin 三页重构, 新增 medication_ui_logic 抽取
- 通知: notification_prefs_page 重构, 新增 notification_prefs_logic; notification_center 优化
- 设备: device_management 重构, 新增 device_sync_ui_logic; device_scan 优化
- 趋势图: trend_page 大幅重构
- 登录: login_page 重构
- 个人资料: 新增 profile_edit_page; profile_page 优化
- 运动: 新增 exercise/ 目录 + care_plan_ui_logic
- 其他: remaining_pages/report_pages/health_drawer/admin/doctor 等多页面调整
- 组件: common_widgets/app_empty_state/app_error_state/app_future_view/app_toast/ai_content 优化
- Provider: chat_provider/consultation_provider/data_providers/auth_provider 调整
- AndroidManifest: 移除多余权限
- 测试: 新增 ai_content/care_plan/home_message/login_flow/medication_checkin/medication_ui/notification_prefs/profile_device/secondary_page/swipe_delete 等大量测试

## 文档
- 新增 ui-design-system.md 设计系统文档
- 新增 secondary-page-color-refresh 计划 + specs 目录

backend/src/Health.Application/HealthArchives/HealthArchiveContracts.cs

@@ -22,6 +22,7 @@ public sealed record HealthArchiveDto(
     IReadOnlyList<string> DietRestrictions,
     IReadOnlyList<string> ChronicDiseases,
     string? FamilyHistory,
+    string? SurgeryHistoryStatus,
     DateTime UpdatedAt);
 
 public sealed record HealthArchiveUpdateRequest(
@@ -32,7 +33,8 @@ public sealed record HealthArchiveUpdateRequest(
     IReadOnlyList<string>? DietRestrictions,
     IReadOnlyList<string>? ChronicDiseases,
     string? FamilyHistory,
-    IReadOnlyList<HealthArchiveSurgeryInput>? Surgeries = null);
+    IReadOnlyList<HealthArchiveSurgeryInput>? Surgeries = null,
+    string? SurgeryHistoryStatus = null);
 
 public interface IHealthArchiveService
 {

backend/src/Health.Application/HealthArchives/HealthArchiveService.cs

@@ -1,5 +1,7 @@
 using Health.Domain.Entities;
 
+using System.ComponentModel.DataAnnotations;
+
 namespace Health.Application.HealthArchives;
 
 public sealed class HealthArchiveService(IHealthArchiveRepository archives) : IHealthArchiveService
@@ -14,6 +16,7 @@ public sealed class HealthArchiveService(IHealthArchiveRepository archives) : IH
 
     public async Task<HealthArchiveDto> UpdateAsync(Guid userId, HealthArchiveUpdateRequest request, CancellationToken ct)
     {
+        Validate(request);
         var archive = await GetOrCreateEntityAsync(userId, ct);
         Apply(archive, request);
         archive.UpdatedAt = DateTime.UtcNow;
@@ -110,6 +113,14 @@ public sealed class HealthArchiveService(IHealthArchiveRepository archives) : IH
         if (request.DietRestrictions != null) archive.DietRestrictions = request.DietRestrictions.ToList();
         if (request.ChronicDiseases != null) archive.ChronicDiseases = request.ChronicDiseases.ToList();
         if (request.FamilyHistory != null) archive.FamilyHistory = request.FamilyHistory;
+        if (request.SurgeryHistoryStatus != null)
+            archive.SurgeryHistoryStatus = request.SurgeryHistoryStatus;
+    }
+
+    private static void Validate(HealthArchiveUpdateRequest request)
+    {
+        if (request.SurgeryHistoryStatus is not null and not ("无" or "有"))
+            throw new ValidationException("手术史状态格式不正确");
     }
 
     private static object ToAiResult(HealthArchiveDto archive) => new
@@ -123,6 +134,7 @@ public sealed class HealthArchiveService(IHealthArchiveRepository archives) : IH
         archive.DietRestrictions,
         archive.ChronicDiseases,
         archive.FamilyHistory,
+        archive.SurgeryHistoryStatus,
     };
 
     private static HealthArchiveDto ToDto(HealthArchive archive) => new(
@@ -136,6 +148,7 @@ public sealed class HealthArchiveService(IHealthArchiveRepository archives) : IH
         archive.DietRestrictions,
         archive.ChronicDiseases,
         archive.FamilyHistory,
+        archive.SurgeryHistoryStatus,
         archive.UpdatedAt);
 
     private static IReadOnlyList<HealthArchiveSurgeryDto> GetSurgeries(HealthArchive archive)