feat: 应用内通知系统 + 结构化手术史/用药等相关改动

- 新增用户通知 outbox 流水线(EfUserNotificationPipeline)与后台投递 worker
- 通知中心页面及前端通知服务接入
- 健康指标异常、用药/运动提醒等事件统一产出站内通知
- 健康档案结构化手术史、用药提醒扫描、医生/用户端点等配套调整
- AppDbContext 注册通知相关实体

health_app/lib/pages/home/home_page.dart

@@ -12,7 +12,6 @@ import '../../providers/auth_provider.dart';
 import '../../providers/chat_provider.dart';
 import '../../providers/data_providers.dart';
 import '../../widgets/health_drawer.dart';
-import '../../services/in_app_notification_service.dart';
 import '../diet/diet_capture_page.dart';
 import 'widgets/chat_messages_view.dart';
 
@@ -29,15 +28,16 @@ class _HomePageState extends ConsumerState<HomePage> {
   String? _pickedImagePath;
   int _lastMsgCount = 0;
   Timer? _notificationTimer;
-  bool _checkingNotifications = false;
 
   @override
   void initState() {
     super.initState();
-    WidgetsBinding.instance.addPostFrameCallback((_) => _checkNotifications());
+    WidgetsBinding.instance.addPostFrameCallback(
+      (_) => ref.invalidate(notificationUnreadCountProvider),
+    );
     _notificationTimer = Timer.periodic(
       const Duration(seconds: 30),
-      (_) => _checkNotifications(),
+      (_) => ref.invalidate(notificationUnreadCountProvider),
     );
   }
 
@@ -50,52 +50,6 @@ class _HomePageState extends ConsumerState<HomePage> {
     super.dispose();
   }
 
-  Future<void> _checkNotifications() async {
-    if (!mounted || _checkingNotifications) return;
-    if (!ref.read(authProvider).isLoggedIn) return;
-    _checkingNotifications = true;
-    try {
-      final service = InAppNotificationService(ref.read(apiClientProvider));
-      final notifications = await service.getPending();
-      for (final notification in notifications) {
-        if (!mounted) return;
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(
-            behavior: SnackBarBehavior.floating,
-            duration: const Duration(seconds: 5),
-            content: Row(
-              children: [
-                Icon(
-                  notification.type == 'ExerciseReminder'
-                      ? Icons.directions_run_outlined
-                      : Icons.medication_outlined,
-                  color: Colors.white,
-                ),
-                const SizedBox(width: 12),
-                Expanded(
-                  child: Column(
-                    mainAxisSize: MainAxisSize.min,
-                    crossAxisAlignment: CrossAxisAlignment.start,
-                    children: [
-                      Text(notification.title,
-                          style: const TextStyle(fontWeight: FontWeight.w700)),
-                      Text(notification.message),
-                    ],
-                  ),
-                ),
-              ],
-            ),
-          ),
-        );
-        await service.acknowledge(notification.id);
-      }
-    } catch (_) {
-      // App 内提醒失败不阻断主页使用，下次轮询会重试。
-    } finally {
-      _checkingNotifications = false;
-    }
-  }
-
   void _sendMessage() {
     final text = _textCtrl.text.trim();
     final imagePath = _pickedImagePath;
@@ -169,6 +123,7 @@ class _HomePageState extends ConsumerState<HomePage> {
     final name = (user?.name != null && user!.name!.isNotEmpty)
         ? user.name
         : '用户';
+    final unreadCount = ref.watch(notificationUnreadCountProvider).value ?? 0;
     return Container(
       padding: const EdgeInsets.fromLTRB(14, 10, 14, 10),
       decoration: BoxDecoration(
@@ -221,7 +176,8 @@ class _HomePageState extends ConsumerState<HomePage> {
           ),
           _HeaderIconButton(
             icon: LucideIcons.bell,
-            onTap: () => pushRoute(ref, 'notificationPrefs'),
+            badgeCount: unreadCount,
+            onTap: () => pushRoute(ref, 'notifications'),
           ),
         ],
       ),
@@ -565,22 +521,55 @@ class _HomePageState extends ConsumerState<HomePage> {
 class _HeaderIconButton extends StatelessWidget {
   final IconData icon;
   final VoidCallback onTap;
-  const _HeaderIconButton({required this.icon, required this.onTap});
+  final int badgeCount;
+  const _HeaderIconButton({
+    required this.icon,
+    required this.onTap,
+    this.badgeCount = 0,
+  });
 
   @override
   Widget build(BuildContext context) {
     return GestureDetector(
       onTap: onTap,
-      child: Container(
-        width: 38,
-        height: 38,
-        decoration: BoxDecoration(
-          gradient: AppColors.surfaceGradient,
-          borderRadius: BorderRadius.circular(14),
-          border: Border.all(color: AppColors.borderLight),
-          boxShadow: AppColors.cardShadowLight,
-        ),
-        child: Icon(icon, size: 20, color: AppColors.textPrimary),
+      child: Stack(
+        clipBehavior: Clip.none,
+        children: [
+          Container(
+            width: 38,
+            height: 38,
+            decoration: BoxDecoration(
+              gradient: AppColors.surfaceGradient,
+              borderRadius: BorderRadius.circular(14),
+              border: Border.all(color: AppColors.borderLight),
+              boxShadow: AppColors.cardShadowLight,
+            ),
+            child: Icon(icon, size: 20, color: AppColors.textPrimary),
+          ),
+          if (badgeCount > 0)
+            Positioned(
+              right: -5,
+              top: -5,
+              child: Container(
+                constraints: const BoxConstraints(minWidth: 18, minHeight: 18),
+                padding: const EdgeInsets.symmetric(horizontal: 4),
+                decoration: BoxDecoration(
+                  color: AppColors.error,
+                  borderRadius: BorderRadius.circular(10),
+                  border: Border.all(color: Colors.white, width: 2),
+                ),
+                alignment: Alignment.center,
+                child: Text(
+                  badgeCount > 99 ? '99+' : '$badgeCount',
+                  style: const TextStyle(
+                    color: Colors.white,
+                    fontSize: 10,
+                    fontWeight: FontWeight.w800,
+                  ),
+                ),
+              ),
+            ),
+        ],
       ),
     );
   }