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

health_app/test/prelaunch_guardrails_test.dart

@@ -1,3 +1,5 @@
+import 'dart:io';
+
 import 'package:flutter_test/flutter_test.dart';
 import 'package:health_app/models/ble_device.dart';
 import 'package:health_app/pages/chart/trend_page.dart';
@@ -11,6 +13,61 @@ void main() {
     expect(normalizeTrendMetricType('spo2'), 'spo2');
   });
 
+  test('trend period includes today and the requested preceding days', () {
+    final now = DateTime(2026, 7, 13, 18);
+    final records = [
+      {'date': DateTime(2026, 7, 6, 23), 'value': 70},
+      {'date': DateTime(2026, 7, 7, 0), 'value': 71},
+      {'date': DateTime(2026, 7, 13, 8), 'value': 72},
+    ];
+
+    final result = filterTrendRecordsForPeriod(records, 7, now);
+
+    expect(result.map((record) => record['value']), [71, 72]);
+  });
+
+  test('trend values do not show an unnecessary decimal', () {
+    expect(formatTrendNumber(88.0), '88');
+    expect(formatTrendNumber(88.5), '88.5');
+    expect(formatTrendNumber(null), '--');
+  });
+
+  test('blood pressure abnormal label identifies the affected value', () {
+    expect(
+      trendStatusLabel({
+        'systolic': 113,
+        'diastolic': 97,
+        'isAbnormal': true,
+      }, 'blood_pressure'),
+      '舒张压偏高',
+    );
+    expect(
+      trendStatusLabel({
+        'systolic': 122,
+        'diastolic': 89,
+        'isAbnormal': false,
+      }, 'blood_pressure'),
+      '',
+    );
+  });
+
+  test('calendar month switch keeps the selected day when possible', () {
+    expect(
+      calendarDateForMonth(DateTime(2026, 6), DateTime(2026, 7, 13)),
+      DateTime(2026, 6, 13),
+    );
+    expect(
+      calendarDateForMonth(DateTime(2026, 2), DateTime(2026, 1, 31)),
+      DateTime(2026, 2, 28),
+    );
+  });
+
+  test('health archive list input is normalized without conflicting none', () {
+    expect(normalizeArchiveItems('青霉素，海鲜\n花粉'), ['青霉素', '海鲜', '花粉']);
+    expect(normalizeArchiveItems('无'), ['无']);
+    expect(normalizeArchiveItems('无、青霉素'), ['青霉素']);
+  });
+
   test('static compliance pages include collection and sdk lists', () {
     expect(staticTextTitle('personalInfoList'), '个人信息收集清单');
     expect(staticTextContent('personalInfoList'), contains('健康数据'));
@@ -19,6 +76,19 @@ void main() {
     expect(staticTextContent('thirdPartySdkList'), contains('AI'));
   });
 
+  test('all in-app compliance documents contain readable Chinese', () {
+    final source = File('lib/pages/remaining_pages.dart').readAsStringSync();
+    final start = source.indexOf(
+      'const Map<String, String> _extraStaticTextTitles',
+    );
+    expect(start, isNonNegative);
+    final complianceSection = source.substring(start);
+
+    expect(complianceSection, isNot(contains('锛')));
+    expect(complianceSection, isNot(contains('銆')));
+    expect(complianceSection, isNot(contains('€')));
+  });
+
   test('ble sync is only implemented for blood pressure devices', () {
     expect(
       HealthBleService.isSyncImplemented(BleDeviceType.bloodPressure),