feat: 添加起卦教程首次访问追踪和Agent时间上下文

- 后端 ProfileSettingsV1 添加 DivinationTutorialSettings 字段
- 前端三个起卦页面添加首次访问检测，自动弹出教程
- 教程展示后更新 settings 标记，避免重复弹出
- 使用本地状态管理避免并发更新覆盖问题
- Agent 系统提示添加时间上下文信息

apps/lib/features/home/presentation/screens/home_screen.dart

@@ -127,6 +127,8 @@ class _HomeScreenState extends State<HomeScreen> {
             allowVibration: widget.profileSettings.notification.allowVibration,
             notificationBloc: widget.notificationBloc,
             notificationRepository: widget.notificationRepository,
+            profileSettings: widget.profileSettings,
+            onProfileSettingsChanged: widget.onProfileSettingsChanged,
           ),
           _ProfileTab(
             account: widget.account,
@@ -160,6 +162,8 @@ class _HomeScreenState extends State<HomeScreen> {
           userId: widget.account,
           onCompleted: widget.onDivinationCompleted,
           allowVibration: widget.profileSettings.notification.allowVibration,
+          profileSettings: widget.profileSettings,
+          onProfileSettingsChanged: widget.onProfileSettingsChanged,
         ),
       ),
     );
@@ -177,6 +181,8 @@ class _HomeTab extends StatelessWidget {
     required this.allowVibration,
     required this.notificationBloc,
     required this.notificationRepository,
+    required this.profileSettings,
+    required this.onProfileSettingsChanged,
   });
 
   final List<DivinationResultData> historyItems;
@@ -189,6 +195,9 @@ class _HomeTab extends StatelessWidget {
   final bool allowVibration;
   final NotificationBloc notificationBloc;
   final NotificationRepository notificationRepository;
+  final ProfileSettingsV1 profileSettings;
+  final Future<void> Function(ProfileSettingsV1 settings)
+  onProfileSettingsChanged;
 
   @override
   Widget build(BuildContext context) {
@@ -304,6 +313,9 @@ class _HomeTab extends StatelessWidget {
                               userId: userId,
                               onCompleted: onDivinationCompleted,
                               allowVibration: allowVibration,
+                              profileSettings: profileSettings,
+                              onProfileSettingsChanged:
+                                  onProfileSettingsChanged,
                             ),
                           ),
                         );