meshcore-open/lib/widgets/empty_state.dart

import 'package:flutter/material.dart';

/// A centered empty state display with icon, title, and optional subtitle/action.
class EmptyState extends StatelessWidget {
  final IconData icon;
  final String title;
  final String? subtitle;
  final Widget? action;

  const EmptyState({
    super.key,
    required this.icon,
    required this.title,
    this.subtitle,
    this.action,
  });

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Icon(icon, size: 64, color: Colors.grey[400]),
          const SizedBox(height: 16),
          Text(
            title,
            style: TextStyle(fontSize: 16, color: Colors.grey[600]),
          ),
          if (subtitle != null) ...[
            const SizedBox(height: 8),
            Text(
              subtitle!,
              style: TextStyle(fontSize: 14, color: Colors.grey[500]),
              textAlign: TextAlign.center,
            ),
          ],
          if (action != null) ...[
            const SizedBox(height: 24),
            action!,
          ],
        ],
      ),
    );
  }
}