new plus button

lib/widgets/name_dialog.dart

@@ -9,6 +9,7 @@ Future<String?> showNameDialog(
   String? initial,
   String label = 'Name',
   String confirmLabel = 'Save',
+  bool allowEmpty = false,
 }) {
   return showDialog<String>(
     context: context,
@@ -17,6 +18,7 @@ Future<String?> showNameDialog(
       initial: initial ?? '',
       label: label,
       confirmLabel: confirmLabel,
+      allowEmpty: allowEmpty,
     ),
   );
 }
@@ -27,12 +29,14 @@ class _NameDialog extends StatefulWidget {
     required this.initial,
     required this.label,
     required this.confirmLabel,
+    required this.allowEmpty,
   });
 
   final String title;
   final String initial;
   final String label;
   final String confirmLabel;
+  final bool allowEmpty;
 
   @override
   State<_NameDialog> createState() => _NameDialogState();
@@ -56,7 +60,7 @@ class _NameDialogState extends State<_NameDialog> {
 
   void _save() {
     final name = _controller.text.trim();
-    if (name.isEmpty) {
+    if (name.isEmpty && !widget.allowEmpty) {
       setState(() => _error = 'Enter a name.');
       return;
     }