feat: 医生端完整实现 + 双角色登录 + 健康日历 + 饮食记录重做 + 配色系统重构

后端:
- User表加Role字段 + DoctorProfile表 + 废弃旧Doctor数据
- JWT加Role claim + 注册/登录拆分(/api/auth/register + /api/auth/login)
- 医生端点全量加JWT鉴权+Role校验(15个端点)
- 日历端点改造(用药/运动/随访按日期+星期匹配)
- 饮食记录PUT端点 + 健康记录DELETE端点
- 用户Profile端点返回Role

前端:
- 登录页重做(角色选择卡片 用户紫/医生蓝 + 审核码6666 + 注册返登录)
- App路由分流(userRole→患者端/医生端)
- 医生端: 工作台Dashboard + 患者管理(搜索分页) + 问诊/报告/随访CRUD
- 报告审核: AI预分析+指标表格+严重程度4级+模板多选+评语
- 随访编辑: 患者选择器+日期时间+打通患者端
- 健康日历: 可点击日历+当日安排列表+用药/运动/随访颜色标记
- 饮食记录: 热量趋势7/30天+日历(一周)+当日胶囊详情+侧滑编辑删除
- 健康档案: 日期选择器+手术可添加多条+白底渐变保存按钮
- 配色系统: 清理25个未使用色+新增doctorBlue/drawerGradient/pageGrey
- 患者端侧边栏: 新渐变+白底按钮+紫色汉堡图标
- AI对话: 用户气泡白底黑字+药管家改蓝色
- App启动闪屏: 防登录页闪烁

文档: color_design_system.md(20页面完整配色设计+图标底色对照表)

health_app/lib/core/app_router.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'navigation_provider.dart';
 import '../pages/auth/login_page.dart';
 import '../pages/home/home_page.dart';
@@ -17,60 +18,55 @@ import '../pages/diet/diet_capture_page.dart';
 import '../pages/device/device_scan_page.dart';
 import '../pages/device/device_management_page.dart';
 import '../pages/remaining_pages.dart';
+import '../pages/doctor/doctor_home_page.dart';
+import '../pages/doctor/doctor_patient_detail_page.dart';
+import '../pages/doctor/doctor_report_detail_page.dart';
+import '../pages/doctor/doctor_followup_edit_page.dart';
+import '../pages/doctor/doctor_settings_page.dart';
+import '../pages/doctor/doctor_profile_page.dart';
+import '../providers/auth_provider.dart' show userRoleProvider;
 
 /// 根据路由信息返回对应页面
-Widget buildPage(RouteInfo route) {
+Widget buildPage(RouteInfo route, WidgetRef ref) {
   final params = route.params;
   switch (route.name) {
-    case 'login':
-      return const LoginPage();
+    case 'login': return const LoginPage();
     case 'home':
-      return const HomePage();
-    case 'trend':
-      return TrendPage(metricType: params['type']?.isNotEmpty == true ? params['type'] : null);
-    case 'calendar':
-      return const HealthCalendarPage();
-    case 'medications':
-      return const MedicationListPage();
-    case 'medCheckIn':
-      return MedicationCheckInPage(medId: params['id']);
-    case 'medicationEdit':
-      return const MedicationEditPage();
-    case 'reports':
-      return const ReportListPage();
-    case 'aiAnalysis':
-      return AiAnalysisPage(id: params['id']!);
-    case 'consultation':
-      return DoctorChatPage(id: params['id']!);
-    case 'exercisePlan':
-      return const ExercisePlanPage();
-    case 'exerciseCreate':
-      return const ExercisePlanCreatePage();
-    case 'dietRecords':
-      return const DietRecordListPage();
-    case 'dietCapture':
-      return const DietCapturePage();
-    case 'profile':
-      return const ProfilePage();
-    case 'devices':
-      return const DeviceManagementPage();
-    case 'deviceScan':
-      return const DeviceScanPage();
-    case 'healthArchive':
-      return const HealthArchivePage();
-    case 'followups':
-      return const FollowUpListPage();
-    case 'settings':
-      return const SettingsPage();
-    case 'notificationPrefs':
-      return const NotificationPrefsPage();
-    case 'staticText':
-      return StaticTextPage(type: params['type']!);
-    case 'servicePackageDetail':
-      return ServicePackageDetailPage(packageId: params['id']!);
-    case 'dietDetail':
-      return DietRecordDetailPage(id: params['id']!);
-    default:
-      return const LoginPage();
+      final role = ref.watch(userRoleProvider);
+      return role == 'Doctor' ? const DoctorHomePage() : const HomePage();
+    case 'doctorHome': return const DoctorHomePage();
+    case 'trend': return TrendPage(metricType: params['type']?.isNotEmpty == true ? params['type'] : null);
+    case 'calendar': return const HealthCalendarPage();
+    case 'medications': return const MedicationListPage();
+    case 'medCheckIn': return MedicationCheckInPage(medId: params['id']);
+    case 'medicationEdit': return const MedicationEditPage();
+    case 'reports': return const ReportListPage();
+    case 'aiAnalysis': return AiAnalysisPage(id: params['id']!);
+    case 'consultation': return DoctorChatPage(id: params['id']!);
+    case 'exercisePlan': return const ExercisePlanPage();
+    case 'exerciseCreate': return const ExercisePlanCreatePage();
+    case 'dietRecords': return const DietRecordListPage();
+    case 'dietCapture': return const DietCapturePage();
+    case 'profile': return const ProfilePage();
+    case 'doctorProfile': return const DoctorProfileEditPage();
+    case 'doctorSettings': return const DoctorSettingsPage();
+    case 'doctorPatientDetail': return DoctorPatientDetailPage(id: params['id']!);
+    case 'doctorChat': return DoctorChatPage(id: params['id']!);
+    case 'doctorReportDetail': return DoctorReportDetailPage(id: params['id']!);
+    case 'doctorFollowUpEdit': return DoctorFollowUpEditPage(id: params['id']!);
+    case 'devices': return const DeviceManagementPage();
+    case 'deviceScan': return const DeviceScanPage();
+    case 'healthArchive': return const HealthArchivePage();
+    case 'followups': return const FollowUpListPage();
+    case 'settings': return const SettingsPage();
+    case 'notificationPrefs': return const NotificationPrefsPage();
+    case 'staticText': return StaticTextPage(type: params['type']!);
+    case 'servicePackageDetail': return ServicePackageDetailPage(packageId: params['id']!);
+    case 'dietDetail': return DietRecordDetailPage(id: params['id']!);
+    default: return const LoginPage();
   }
 }
+
+// ── 医生端次级页面 Stubs（逐步实现）──
+
+