add group limit size

lib/src/localization/generated/app_localizations.dart

@@ -2931,6 +2931,12 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'You can only delete the contact once the direct chat has been deleted and the contact is no longer a member of a group.'**
   String get deleteUserErrorMessage;
+
+  /// No description provided for @groupSizeLimitError.
+  ///
+  /// In en, this message translates to:
+  /// **'Currently, group size is limited to {size} people!'**
+  String groupSizeLimitError(Object size);
 }
 
 class _AppLocalizationsDelegate

lib/src/localization/generated/app_localizations_de.dart

@@ -1631,4 +1631,9 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get deleteUserErrorMessage =>
       'Du kannst den Kontakt erst löschen, wenn der direkte Chat gelöscht wurde und der Kontakt nicht mehr Mitglied einer Gruppe ist.';
+
+  @override
+  String groupSizeLimitError(Object size) {
+    return 'Derzeit ist die Gruppengröße auf $size Personen begrenzt!';
+  }
 }

lib/src/localization/generated/app_localizations_en.dart

@@ -1619,4 +1619,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get deleteUserErrorMessage =>
       'You can only delete the contact once the direct chat has been deleted and the contact is no longer a member of a group.';
+
+  @override
+  String groupSizeLimitError(Object size) {
+    return 'Currently, group size is limited to $size people!';
+  }
 }

lib/src/localization/generated/app_localizations_sv.dart

@@ -1619,4 +1619,9 @@ class AppLocalizationsSv extends AppLocalizations {
   @override
   String get deleteUserErrorMessage =>
       'You can only delete the contact once the direct chat has been deleted and the contact is no longer a member of a group.';
+
+  @override
+  String groupSizeLimitError(Object size) {
+    return 'Currently, group size is limited to $size people!';
+  }
 }

lib/src/localization/translations

@@ -1 +1 @@
-Subproject commit 4096b342802fc07be92070c7db6f46353790876b
+Subproject commit 471fed328ff1bf9316e9b86456ecdd68f4cfabca

lib/src/views/groups/group_create_select_members.view.dart

@@ -84,6 +84,15 @@ class _StartNewChatView extends State<GroupCreateSelectMembersView> {
   void toggleSelectedUser(int userId) {
     if (alreadyInGroup.contains(userId)) return;
     if (!selectedUsers.contains(userId)) {
+      if (selectedUsers.length + alreadyInGroup.length > 256) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            content: Text(context.lang.groupSizeLimitError(256)),
+            duration: const Duration(seconds: 3),
+          ),
+        );
+        return;
+      }
       selectedUsers.add(userId);
     } else {
       selectedUsers.remove(userId);