diff --git a/fastlane/metadata/android/en-US/changelogs/16.txt b/fastlane/metadata/android/en-US/changelogs/16.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ac2c90e221caf3cf01ebba168fb16a8f31c0253a
--- /dev/null
+++ b/fastlane/metadata/android/en-US/changelogs/16.txt
@@ -0,0 +1 @@
+Normalize Activity application architecture.
diff --git a/fastlane/metadata/android/fr-FR/changelogs/16.txt b/fastlane/metadata/android/fr-FR/changelogs/16.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1d6843d89ba84ea4147528bc3d62d9ecf1a4a762
--- /dev/null
+++ b/fastlane/metadata/android/fr-FR/changelogs/16.txt
@@ -0,0 +1 @@
+Harmonisation des applications en Activity.
diff --git a/lib/config/activity_page.dart b/lib/common/config/activity_page.dart
similarity index 67%
rename from lib/config/activity_page.dart
rename to lib/common/config/activity_page.dart
index cc144808239b64f7877419e270d535456b16f8f5..54676921af9b12bef73a67cc608401eedc9ad98b 100644
--- a/lib/config/activity_page.dart
+++ b/lib/common/config/activity_page.dart
@@ -1,61 +1,59 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
-import 'package:midisynth/ui/pages/editor.dart';
-import 'package:midisynth/ui/pages/home.dart';
-import 'package:midisynth/ui/pages/player.dart';
+import 'package:midisynth/common/ui/pages/editor.dart';
+import 'package:midisynth/common/ui/pages/home.dart';
+import 'package:midisynth/common/ui/pages/player.dart';
 
 class ActivityPageItem {
+  final String code;
   final Icon icon;
   final Widget page;
-  final String code;
 
   const ActivityPageItem({
+    required this.code,
     required this.icon,
     required this.page,
-    required this.code,
   });
 }
 
 class ActivityPage {
+  static const bool displayBottomNavBar = true;
+
   static const indexHome = 0;
   static const pageHome = ActivityPageItem(
+    code: 'page_home',
     icon: Icon(UniconsLine.home),
     page: PageHome(),
-    code: 'page_home',
   );
 
   static const indexEditor = 1;
   static const pageEditor = ActivityPageItem(
-    icon: Icon(UniconsLine.setting),
-    page: PageEditor(),
     code: 'page_editor',
+    icon: Icon(UniconsLine.edit),
+    page: PageEditor(),
   );
 
   static const indexPlayer = 2;
   static const pagePlayer = ActivityPageItem(
-    icon: Icon(UniconsLine.info_circle),
-    page: PagePlayer(),
     code: 'page_player',
+    icon: Icon(UniconsLine.play),
+    page: PagePlayer(),
   );
 
-  static Map<int, ActivityPageItem> items = {
+  static const Map<int, ActivityPageItem> items = {
     indexHome: pageHome,
     indexEditor: pageEditor,
     indexPlayer: pagePlayer,
   };
 
+  static int defaultPageIndex = indexHome;
+
   static bool isIndexAllowed(int pageIndex) {
     return items.keys.contains(pageIndex);
   }
 
-  static ActivityPageItem getPageItem(int pageIndex) {
-    return items[pageIndex] ?? pageHome;
-  }
-
-  static Widget getPageWidget(int pageIndex) {
+  static Widget getWidget(int pageIndex) {
     return items[pageIndex]?.page ?? pageHome.page;
   }
-
-  static int itemsCount = ActivityPage.items.length;
 }
diff --git a/lib/config/screen.dart b/lib/common/config/screen.dart
similarity index 67%
rename from lib/config/screen.dart
rename to lib/common/config/screen.dart
index 0e8dcea52fc82f0f904ee04e84d7eef48a6201fb..e68c0df4cf9c62d88a495f7ee61d1a56c98566f7 100644
--- a/lib/config/screen.dart
+++ b/lib/common/config/screen.dart
@@ -1,42 +1,42 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
-import 'package:midisynth/ui/screens/about.dart';
-import 'package:midisynth/ui/screens/activity.dart';
-import 'package:midisynth/ui/screens/settings.dart';
+import 'package:midisynth/common/ui/screens/about.dart';
+import 'package:midisynth/common/ui/screens/activity.dart';
+import 'package:midisynth/common/ui/screens/settings.dart';
 
 class ScreenItem {
+  final String code;
   final Icon icon;
   final Widget screen;
-  final bool displayBottomNavBar;
 
   const ScreenItem({
+    required this.code,
     required this.icon,
     required this.screen,
-    required this.displayBottomNavBar,
   });
 }
 
 class Screen {
   static const indexActivity = 0;
   static const screenActivity = ScreenItem(
+    code: 'screen_activity',
     icon: Icon(UniconsLine.home),
     screen: ScreenActivity(),
-    displayBottomNavBar: true,
   );
 
   static const indexSettings = 1;
   static const screenSettings = ScreenItem(
+    code: 'screen_settings',
     icon: Icon(UniconsLine.setting),
     screen: ScreenSettings(),
-    displayBottomNavBar: false,
   );
 
   static const indexAbout = 2;
   static const screenAbout = ScreenItem(
+    code: 'screen_about',
     icon: Icon(UniconsLine.info_circle),
     screen: ScreenAbout(),
-    displayBottomNavBar: false,
   );
 
   static Map<int, ScreenItem> items = {
@@ -52,10 +52,4 @@ class Screen {
   static Widget getWidget(int screenIndex) {
     return items[screenIndex]?.screen ?? screenActivity.screen;
   }
-
-  static bool displayBottomNavBar(int screenIndex) {
-    return items[screenIndex]?.displayBottomNavBar ?? screenActivity.displayBottomNavBar;
-  }
-
-  static int itemsCount = Screen.items.length;
 }
diff --git a/lib/cubit/nav_cubit_pages.dart b/lib/common/cubit/nav/nav_cubit_pages.dart
similarity index 72%
rename from lib/cubit/nav_cubit_pages.dart
rename to lib/common/cubit/nav/nav_cubit_pages.dart
index 9f04bf87ed47d754877b615d3c0216680ada8c35..0dd60318a344508d859846e77513e91fc9ded506 100644
--- a/lib/cubit/nav_cubit_pages.dart
+++ b/lib/common/cubit/nav/nav_cubit_pages.dart
@@ -1,6 +1,6 @@
 import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
-import 'package:midisynth/config/activity_page.dart';
+import 'package:midisynth/common/config/activity_page.dart';
 
 class NavCubitPage extends HydratedCubit<int> {
   NavCubitPage() : super(0);
@@ -13,6 +13,10 @@ class NavCubitPage extends HydratedCubit<int> {
     }
   }
 
+  void goToPageHome() {
+    updateIndex(ActivityPage.indexHome);
+  }
+
   @override
   int fromJson(Map<String, dynamic> json) {
     return ActivityPage.indexHome;
@@ -20,6 +24,6 @@ class NavCubitPage extends HydratedCubit<int> {
 
   @override
   Map<String, dynamic>? toJson(int state) {
-    return <String, int>{'pageIndex': state};
+    return <String, int>{'index': state};
   }
 }
diff --git a/lib/cubit/nav_cubit_screens.dart b/lib/common/cubit/nav/nav_cubit_screens.dart
similarity index 71%
rename from lib/cubit/nav_cubit_screens.dart
rename to lib/common/cubit/nav/nav_cubit_screens.dart
index cb76510d10f189bb84c13d6c0ee12ad8571dbcb4..04c78b376c299d67999e0142ad9b2bd8aa782c00 100644
--- a/lib/cubit/nav_cubit_screens.dart
+++ b/lib/common/cubit/nav/nav_cubit_screens.dart
@@ -1,6 +1,6 @@
 import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
-import 'package:midisynth/config/screen.dart';
+import 'package:midisynth/common/config/screen.dart';
 
 class NavCubitScreen extends HydratedCubit<int> {
   NavCubitScreen() : super(0);
@@ -9,19 +9,19 @@ class NavCubitScreen extends HydratedCubit<int> {
     if (Screen.isIndexAllowed(index)) {
       emit(index);
     } else {
-      goToActivityPage();
+      goToScreenActivity();
     }
   }
 
-  void goToActivityPage() {
+  void goToScreenActivity() {
     emit(Screen.indexActivity);
   }
 
-  void goToSettingsPage() {
+  void goToScreenSettings() {
     emit(Screen.indexSettings);
   }
 
-  void goToAboutPage() {
+  void goToScreenAbout() {
     emit(Screen.indexAbout);
   }
 
@@ -32,6 +32,6 @@ class NavCubitScreen extends HydratedCubit<int> {
 
   @override
   Map<String, dynamic>? toJson(int state) {
-    return <String, int>{'screenIndex': state};
+    return <String, int>{'index': state};
   }
 }
diff --git a/lib/ui/nav/bottom_nav_bar.dart b/lib/common/ui/nav/bottom_nav_bar.dart
similarity index 74%
rename from lib/ui/nav/bottom_nav_bar.dart
rename to lib/common/ui/nav/bottom_nav_bar.dart
index 16405843ee4de28c4bf04055603134f3d223fdfe..0e7f3971f04a14b23042ce8f4d78234c97754762 100644
--- a/lib/ui/nav/bottom_nav_bar.dart
+++ b/lib/common/ui/nav/bottom_nav_bar.dart
@@ -1,8 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
-import 'package:midisynth/config/activity_page.dart';
-import 'package:midisynth/cubit/nav_cubit_pages.dart';
+import 'package:midisynth/common/config/activity_page.dart';
+import 'package:midisynth/common/cubit/nav/nav_cubit_pages.dart';
 
 class BottomNavBar extends StatelessWidget {
   const BottomNavBar({super.key});
@@ -21,17 +21,14 @@ class BottomNavBar extends StatelessWidget {
         ),
       ),
       child: BlocBuilder<NavCubitPage, int>(builder: (BuildContext context, int state) {
-        final List<ActivityPageItem> pageItems = [
-          ActivityPage.pageHome,
-          ActivityPage.pageEditor,
-          ActivityPage.pagePlayer,
-        ];
-        final List<BottomNavigationBarItem> items = pageItems.map((ActivityPageItem item) {
-          return BottomNavigationBarItem(
+        final List<BottomNavigationBarItem> items = [];
+
+        ActivityPage.items.forEach((int pageIndex, ActivityPageItem item) {
+          items.add(BottomNavigationBarItem(
             icon: item.icon,
             label: tr(item.code),
-          );
-        }).toList();
+          ));
+        });
 
         return BottomNavigationBar(
           currentIndex: state,
diff --git a/lib/common/ui/nav/global_app_bar.dart b/lib/common/ui/nav/global_app_bar.dart
new file mode 100644
index 0000000000000000000000000000000000000000..2faa2c9c906b9cc8c3e567a6345f36316ad4a24d
--- /dev/null
+++ b/lib/common/ui/nav/global_app_bar.dart
@@ -0,0 +1,86 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
+
+import 'package:midisynth/common/config/screen.dart';
+import 'package:midisynth/common/cubit/nav/nav_cubit_pages.dart';
+import 'package:midisynth/common/cubit/nav/nav_cubit_screens.dart';
+
+import 'package:midisynth/cubit/activity/activity_cubit.dart';
+import 'package:midisynth/models/activity/activity.dart';
+
+class GlobalAppBar extends StatelessWidget implements PreferredSizeWidget {
+  const GlobalAppBar({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return BlocBuilder<ActivityCubit, ActivityState>(
+      builder: (BuildContext context, ActivityState activityState) {
+        return BlocBuilder<NavCubitScreen, int>(
+          builder: (BuildContext context, int pageIndex) {
+            final Activity currentActivity = activityState.currentActivity;
+
+            final List<Widget> menuActions = [];
+
+            if (currentActivity.isRunning && !currentActivity.isFinished) {
+              menuActions.add(StyledButton(
+                color: Colors.red,
+                onPressed: () {},
+                onLongPress: () {
+                  BlocProvider.of<ActivityCubit>(context).quitActivity();
+                  BlocProvider.of<NavCubitPage>(context).goToPageHome();
+                },
+                child: const Image(
+                  image: AssetImage('assets/ui/button_back.png'),
+                  fit: BoxFit.fill,
+                ),
+              ));
+            } else {
+              if (pageIndex == Screen.indexActivity) {
+                // go to Settings page
+                menuActions.add(ElevatedButton(
+                  onPressed: () {
+                    BlocProvider.of<NavCubitScreen>(context).goToScreenSettings();
+                  },
+                  style: ElevatedButton.styleFrom(
+                    shape: const CircleBorder(),
+                  ),
+                  child: Screen.screenSettings.icon,
+                ));
+
+                // go to About page
+                menuActions.add(ElevatedButton(
+                  onPressed: () {
+                    BlocProvider.of<NavCubitScreen>(context).goToScreenAbout();
+                  },
+                  style: ElevatedButton.styleFrom(
+                    shape: const CircleBorder(),
+                  ),
+                  child: Screen.screenAbout.icon,
+                ));
+              } else {
+                // back to Home page
+                menuActions.add(ElevatedButton(
+                  onPressed: () {
+                    BlocProvider.of<NavCubitScreen>(context).goToScreenActivity();
+                  },
+                  style: ElevatedButton.styleFrom(
+                    shape: const CircleBorder(),
+                  ),
+                  child: Screen.screenActivity.icon,
+                ));
+              }
+            }
+
+            return AppBar(
+              title: const AppHeader(text: 'app_name'),
+              actions: menuActions,
+            );
+          },
+        );
+      },
+    );
+  }
+
+  @override
+  Size get preferredSize => const Size.fromHeight(50);
+}
diff --git a/lib/ui/pages/editor.dart b/lib/common/ui/pages/editor.dart
similarity index 93%
rename from lib/ui/pages/editor.dart
rename to lib/common/ui/pages/editor.dart
index 95eb89270d7cac5f05282e7a4948c2cd997b380e..e6277221f130056511a03f3f58b7213714920dce 100644
--- a/lib/ui/pages/editor.dart
+++ b/lib/common/ui/pages/editor.dart
@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
-import 'package:midisynth/cubit/activity_cubit.dart';
+import 'package:midisynth/cubit/activity/activity_cubit.dart';
 import 'package:midisynth/models/activity/activity.dart';
 
 class PageEditor extends StatelessWidget {
diff --git a/lib/ui/pages/home.dart b/lib/common/ui/pages/home.dart
similarity index 93%
rename from lib/ui/pages/home.dart
rename to lib/common/ui/pages/home.dart
index 0d58a14a7d4eccf2fe9b1fa86a95c776f48090dc..4f700e9a12a8018ff50654fab90336e234ca5a17 100644
--- a/lib/ui/pages/home.dart
+++ b/lib/common/ui/pages/home.dart
@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
-import 'package:midisynth/cubit/activity_cubit.dart';
+import 'package:midisynth/cubit/activity/activity_cubit.dart';
 import 'package:midisynth/models/activity/activity.dart';
 
 class PageHome extends StatelessWidget {
diff --git a/lib/ui/pages/player.dart b/lib/common/ui/pages/player.dart
similarity index 93%
rename from lib/ui/pages/player.dart
rename to lib/common/ui/pages/player.dart
index 4afada7c639aa6819f38132ace4dab41346eb2d6..81290683fd64c073da1c2f054f9b15e976ec4b61 100644
--- a/lib/ui/pages/player.dart
+++ b/lib/common/ui/pages/player.dart
@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
-import 'package:midisynth/cubit/activity_cubit.dart';
+import 'package:midisynth/cubit/activity/activity_cubit.dart';
 import 'package:midisynth/models/activity/activity.dart';
 
 class PagePlayer extends StatelessWidget {
diff --git a/lib/ui/screens/about.dart b/lib/common/ui/screens/about.dart
similarity index 100%
rename from lib/ui/screens/about.dart
rename to lib/common/ui/screens/about.dart
diff --git a/lib/ui/screens/activity.dart b/lib/common/ui/screens/activity.dart
similarity index 67%
rename from lib/ui/screens/activity.dart
rename to lib/common/ui/screens/activity.dart
index 37176cd7cc1fa70e5649fe608f551020453b51eb..b58355340ea328055a27106f1858cefce8ffb1a1 100644
--- a/lib/ui/screens/activity.dart
+++ b/lib/common/ui/screens/activity.dart
@@ -1,8 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
-import 'package:midisynth/config/activity_page.dart';
-import 'package:midisynth/cubit/nav_cubit_pages.dart';
+import 'package:midisynth/common/config/activity_page.dart';
+import 'package:midisynth/common/cubit/nav/nav_cubit_pages.dart';
 
 class ScreenActivity extends StatelessWidget {
   const ScreenActivity({super.key});
@@ -11,7 +11,7 @@ class ScreenActivity extends StatelessWidget {
   Widget build(BuildContext context) {
     return BlocBuilder<NavCubitPage, int>(
       builder: (BuildContext context, int pageIndex) {
-        return ActivityPage.getPageWidget(pageIndex);
+        return ActivityPage.getWidget(pageIndex);
       },
     );
   }
diff --git a/lib/ui/screens/settings.dart b/lib/common/ui/screens/settings.dart
similarity index 100%
rename from lib/ui/screens/settings.dart
rename to lib/common/ui/screens/settings.dart
diff --git a/lib/config/application_config.dart b/lib/config/application_config.dart
new file mode 100644
index 0000000000000000000000000000000000000000..590118862f9f00bc8d964d7b5b59b211345db9f8
--- /dev/null
+++ b/lib/config/application_config.dart
@@ -0,0 +1,3 @@
+class ApplicationConfig {
+  static const String appTitle = 'MIDI Synth';
+}
diff --git a/lib/cubit/activity_cubit.dart b/lib/cubit/activity/activity_cubit.dart
similarity index 100%
rename from lib/cubit/activity_cubit.dart
rename to lib/cubit/activity/activity_cubit.dart
diff --git a/lib/cubit/activity_state.dart b/lib/cubit/activity/activity_state.dart
similarity index 100%
rename from lib/cubit/activity_state.dart
rename to lib/cubit/activity/activity_state.dart
diff --git a/lib/cubit/settings_activity_cubit.dart b/lib/cubit/settings/settings_activity_cubit.dart
similarity index 100%
rename from lib/cubit/settings_activity_cubit.dart
rename to lib/cubit/settings/settings_activity_cubit.dart
diff --git a/lib/cubit/settings_activity_state.dart b/lib/cubit/settings/settings_activity_state.dart
similarity index 100%
rename from lib/cubit/settings_activity_state.dart
rename to lib/cubit/settings/settings_activity_state.dart
diff --git a/lib/cubit/settings_global_cubit.dart b/lib/cubit/settings/settings_global_cubit.dart
similarity index 100%
rename from lib/cubit/settings_global_cubit.dart
rename to lib/cubit/settings/settings_global_cubit.dart
diff --git a/lib/cubit/settings_global_state.dart b/lib/cubit/settings/settings_global_state.dart
similarity index 100%
rename from lib/cubit/settings_global_state.dart
rename to lib/cubit/settings/settings_global_state.dart
diff --git a/lib/main.dart b/lib/main.dart
index 2e12d5d3910758fbef6a4bf4d9d6c74dd524ffe1..dc791d6a2604546e31c50ea96b87776f3011cd8a 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -4,11 +4,13 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
-import 'package:midisynth/cubit/activity_cubit.dart';
-import 'package:midisynth/cubit/settings_activity_cubit.dart';
-import 'package:midisynth/cubit/nav_cubit_pages.dart';
-import 'package:midisynth/cubit/nav_cubit_screens.dart';
-import 'package:midisynth/cubit/settings_global_cubit.dart';
+import 'package:midisynth/common/cubit/nav/nav_cubit_pages.dart';
+import 'package:midisynth/common/cubit/nav/nav_cubit_screens.dart';
+
+import 'package:midisynth/config/application_config.dart';
+import 'package:midisynth/cubit/activity/activity_cubit.dart';
+import 'package:midisynth/cubit/settings/settings_activity_cubit.dart';
+import 'package:midisynth/cubit/settings/settings_global_cubit.dart';
 import 'package:midisynth/ui/skeleton.dart';
 
 void main() async {
@@ -41,18 +43,30 @@ class MyApp extends StatelessWidget {
   Widget build(BuildContext context) {
     return MultiBlocProvider(
       providers: [
-        BlocProvider<NavCubitPage>(create: (context) => NavCubitPage()),
-        BlocProvider<NavCubitScreen>(create: (context) => NavCubitScreen()),
+        // default providers
+        BlocProvider<NavCubitPage>(
+          create: (context) => NavCubitPage(),
+        ),
+        BlocProvider<NavCubitScreen>(
+          create: (context) => NavCubitScreen(),
+        ),
         BlocProvider<ApplicationThemeModeCubit>(
-            create: (context) => ApplicationThemeModeCubit()),
-        BlocProvider<ActivityCubit>(create: (context) => ActivityCubit()),
-        BlocProvider<GlobalSettingsCubit>(create: (context) => GlobalSettingsCubit()),
-        BlocProvider<ActivitySettingsCubit>(create: (context) => ActivitySettingsCubit()),
+          create: (context) => ApplicationThemeModeCubit(),
+        ),
+        BlocProvider<ActivityCubit>(
+          create: (context) => ActivityCubit(),
+        ),
+        BlocProvider<GlobalSettingsCubit>(
+          create: (context) => GlobalSettingsCubit(),
+        ),
+        BlocProvider<ActivitySettingsCubit>(
+          create: (context) => ActivitySettingsCubit(),
+        ),
       ],
       child: BlocBuilder<ApplicationThemeModeCubit, ApplicationThemeModeState>(
         builder: (BuildContext context, ApplicationThemeModeState state) {
           return MaterialApp(
-            title: 'MIDI Synth',
+            title: ApplicationConfig.appTitle,
             home: const SkeletonScreen(),
 
             // Theme stuff
diff --git a/lib/ui/nav/global_app_bar.dart b/lib/ui/nav/global_app_bar.dart
deleted file mode 100644
index 1c513d66adc52465dbf8ab356e49d0bcb809f193..0000000000000000000000000000000000000000
--- a/lib/ui/nav/global_app_bar.dart
+++ /dev/null
@@ -1,66 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
-
-import 'package:midisynth/config/screen.dart';
-import 'package:midisynth/cubit/activity_cubit.dart';
-import 'package:midisynth/cubit/nav_cubit_screens.dart';
-
-class GlobalAppBar extends StatelessWidget implements PreferredSizeWidget {
-  const GlobalAppBar({super.key});
-
-  @override
-  Widget build(BuildContext context) {
-    return BlocBuilder<ActivityCubit, ActivityState>(
-      builder: (BuildContext context, ActivityState activityState) {
-        return BlocBuilder<NavCubitScreen, int>(
-          builder: (BuildContext context, int screenIndex) {
-            final List<Widget> menuActions = [];
-
-            if (screenIndex == Screen.indexActivity) {
-              // go to Settings page
-              menuActions.add(ElevatedButton(
-                onPressed: () {
-                  BlocProvider.of<NavCubitScreen>(context).goToSettingsPage();
-                },
-                style: ElevatedButton.styleFrom(
-                  shape: const CircleBorder(),
-                ),
-                child: Screen.screenSettings.icon,
-              ));
-
-              // go to About page
-              menuActions.add(ElevatedButton(
-                onPressed: () {
-                  BlocProvider.of<NavCubitScreen>(context).goToAboutPage();
-                },
-                style: ElevatedButton.styleFrom(
-                  shape: const CircleBorder(),
-                ),
-                child: Screen.screenAbout.icon,
-              ));
-            } else {
-              // back to Home page
-              menuActions.add(ElevatedButton(
-                onPressed: () {
-                  BlocProvider.of<NavCubitScreen>(context).goToActivityPage();
-                },
-                style: ElevatedButton.styleFrom(
-                  shape: const CircleBorder(),
-                ),
-                child: Screen.screenActivity.icon,
-              ));
-            }
-
-            return AppBar(
-              title: const AppHeader(text: 'app_name'),
-              actions: menuActions,
-            );
-          },
-        );
-      },
-    );
-  }
-
-  @override
-  Size get preferredSize => const Size.fromHeight(50);
-}
diff --git a/lib/ui/skeleton.dart b/lib/ui/skeleton.dart
index d6ccf5e7b056ce4d391cdf0e013506078236cf26..de4d3177758bc3799c761b18b924d3e3f8311fb4 100644
--- a/lib/ui/skeleton.dart
+++ b/lib/ui/skeleton.dart
@@ -1,10 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
-import 'package:midisynth/config/screen.dart';
-import 'package:midisynth/cubit/nav_cubit_screens.dart';
-import 'package:midisynth/ui/nav/bottom_nav_bar.dart';
-import 'package:midisynth/ui/nav/global_app_bar.dart';
+import 'package:midisynth/common/config/activity_page.dart';
+import 'package:midisynth/common/config/screen.dart';
+import 'package:midisynth/common/cubit/nav/nav_cubit_screens.dart';
+import 'package:midisynth/common/ui/nav/global_app_bar.dart';
+import 'package:midisynth/common/ui/nav/bottom_nav_bar.dart';
 
 class SkeletonScreen extends StatelessWidget {
   const SkeletonScreen({super.key});
@@ -28,8 +29,7 @@ class SkeletonScreen extends StatelessWidget {
             ),
           ),
           backgroundColor: Theme.of(context).colorScheme.surface,
-          bottomNavigationBar:
-              Screen.displayBottomNavBar(screenIndex) ? const BottomNavBar() : null,
+          bottomNavigationBar: ActivityPage.displayBottomNavBar ? const BottomNavBar() : null,
         );
       },
     );
diff --git a/pubspec.lock b/pubspec.lock
index 011ee2e27741f0e29cbc4b4aac803190885ffbae..5f7d30f1d27f049d10d751142b1e10ef2a65d726 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -245,10 +245,10 @@ packages:
     dependency: transitive
     description:
       name: path_provider
-      sha256: fec0d61223fba3154d87759e3cc27fe2c8dc498f6386c6d6fc80d1afdd1bf378
+      sha256: "50c5dd5b6e1aaf6fb3a78b33f6aa3afca52bf903a8a5298f53101fdaee55bbcd"
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.4"
+    version: "2.1.5"
   path_provider_android:
     dependency: transitive
     description:
@@ -442,10 +442,10 @@ packages:
     dependency: transitive
     description:
       name: win32
-      sha256: "2735daae5150e8b1dfeb3eb0544b4d3af0061e9e82cef063adcd583bdae4306a"
+      sha256: "10169d3934549017f0ae278ccb07f828f9d6ea21573bab0fb77b0e1ef0fce454"
       url: "https://pub.dev"
     source: hosted
-    version: "5.7.0"
+    version: "5.7.2"
   xdg_directories:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index ca48c3799a47cd4f71c0477545ec85e567e5d89d..b34b420215e331917ad697676fd6648327ad541e 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -3,7 +3,7 @@ description: MIDI Synth
 
 publish_to: "none"
 
-version: 0.2.1+15
+version: 0.3.0+16
 
 environment:
   sdk: "^3.0.0"