feat: add intro screen

lib/core/router/app_router.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
+import 'package:hiddify/core/prefs/prefs.dart';
 import 'package:hiddify/core/router/routes/routes.dart';
 import 'package:hiddify/services/deep_link_service.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
@@ -9,6 +10,7 @@ part 'app_router.g.dart';
 // TODO: test and improve handling of deep link
 @riverpod
 GoRouter router(RouterRef ref) {
+  final introCompleted = ref.watch(introCompletedProvider);
   final deepLink = ref.listen(
     deepLinkServiceProvider,
     (_, next) async {
@@ -28,6 +30,12 @@ GoRouter router(RouterRef ref) {
     initialLocation: initialLocation,
     debugLogDiagnostics: true,
     routes: $routes,
+    redirect: (context, state) {
+      if (!introCompleted && state.uri.path != const IntroRoute().location) {
+        return const IntroRoute().location;
+      }
+      return null;
+    },
   );
 }
 

lib/core/router/routes/routes.dart

@@ -1,12 +1,14 @@
 import 'package:go_router/go_router.dart';
 import 'package:hiddify/core/router/routes/desktop_routes.dart' as desktop;
 import 'package:hiddify/core/router/routes/mobile_routes.dart' as mobile;
+import 'package:hiddify/core/router/routes/shared_routes.dart' as shared;
 import 'package:hiddify/utils/utils.dart';
 
 export 'mobile_routes.dart';
-export 'shared_routes.dart';
+export 'shared_routes.dart' hide $appRoutes;
 
 List<RouteBase> get $routes => [
+      ...shared.$appRoutes,
       if (PlatformUtils.isDesktop)
         ...desktop.$appRoutes
       else

lib/core/router/routes/shared_routes.dart

@@ -1,11 +1,14 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import 'package:hiddify/features/home/view/view.dart';
+import 'package:hiddify/features/intro/view/view.dart';
 import 'package:hiddify/features/profile_detail/view/view.dart';
 import 'package:hiddify/features/profiles/view/view.dart';
 import 'package:hiddify/features/proxies/view/view.dart';
 import 'package:hiddify/utils/utils.dart';
 
+part 'shared_routes.g.dart';
+
 final GlobalKey<NavigatorState> rootNavigatorKey = GlobalKey<NavigatorState>();
 
 class HomeRoute extends GoRouteData {
@@ -47,6 +50,20 @@ class AddProfileRoute extends GoRouteData {
   }
 }
 
+@TypedGoRoute<IntroRoute>(path: IntroRoute.path)
+class IntroRoute extends GoRouteData {
+  const IntroRoute();
+  static const path = '/intro';
+
+  @override
+  Page<void> buildPage(BuildContext context, GoRouterState state) {
+    return const MaterialPage(
+      fullscreenDialog: true,
+      child: IntroPage(),
+    );
+  }
+}
+
 class ProfilesRoute extends GoRouteData {
   const ProfilesRoute();
   static const path = 'profiles';