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/profile_device_drawer_guardrails_test.dart

@@ -0,0 +1,71 @@
+import 'dart:io';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:health_app/models/ble_device.dart';
+import 'package:health_app/pages/device/device_sync_ui_logic.dart';
+
+void main() {
+  test('unsupported bound devices are labelled without pretending to sync', () {
+    expect(deviceSyncAvailabilityLabel(BleDeviceType.glucose), '暂不支持自动同步');
+    expect(deviceSyncAvailabilityLabel(BleDeviceType.bloodPressure), isNull);
+  });
+
+  test('device sync errors keep connection and upload failures distinct', () {
+    expect(
+      deviceSyncErrorMessage(
+        const DeviceSyncFailure(DeviceSyncFailureStage.permission),
+      ),
+      contains('蓝牙权限'),
+    );
+    expect(
+      deviceSyncErrorMessage(
+        const DeviceSyncFailure(DeviceSyncFailureStage.upload),
+      ),
+      contains('上传'),
+    );
+  });
+
+  test('bound device page keeps the automatic scan indicator', () {
+    final page = File(
+      'lib/pages/device/device_management_page.dart',
+    ).readAsStringSync();
+
+    expect(page, contains('AnimationController('));
+    expect(page, contains('child: _ScanIndicator('));
+    expect(page, contains('scanning: _scanning'));
+  });
+
+  test('profile exposes a real edit route and keeps phone read only', () {
+    final profile = File(
+      'lib/pages/profile/profile_page.dart',
+    ).readAsStringSync();
+    final editor = File(
+      'lib/pages/profile/profile_edit_page.dart',
+    ).readAsStringSync();
+    final router = File('lib/core/app_router.dart').readAsStringSync();
+
+    expect(profile, contains("pushRoute(ref, 'profileEdit')"));
+    expect(editor, contains('手机号不可修改'));
+    expect(router, contains("case 'profileEdit':"));
+  });
+
+  test(
+    'drawer does not refetch history when only current conversation changes',
+    () {
+      final provider = File(
+        'lib/providers/conversation_history_provider.dart',
+      ).readAsStringSync();
+      final drawer = File('lib/widgets/health_drawer.dart').readAsStringSync();
+
+      expect(
+        provider,
+        isNot(
+          contains(
+            'ref.watch(chatProvider.select((state) => state.conversationId))',
+          ),
+        ),
+      );
+      expect(drawer, contains('currentConversationId'));
+    },
+  );
+}