void _showParticipantsDialog(BuildContext context) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('Participants'),
        content: SizedBox(
          width: double.maxFinite,
          child: FutureBuilder<List<User>>(
            future: UserRepository().getUsersByIds([
              ...widget.trip.participants,
              widget.trip.createdBy,
            ]),
            builder: (context, snapshot) {
              if (snapshot.connectionState == ConnectionState.waiting) {
                return const Center(child: CircularProgressIndicator());
              }
              
              if (snapshot.hasError) {
                return const Center(child: Text('Erreur de chargement'));
              }

              final users = snapshot.data ?? [];
              if (users.isEmpty) {
                return const Center(child: Text('Aucun participant trouvé'));
              }

              return ListView.builder(
                shrinkWrap: true,
                itemCount: users.length,
                itemBuilder: (context, index) {
                  final user = users[index];
                  final isCreator = user.id == widget.trip.createdBy;
                  
                  return ListTile(
                    leading: CircleAvatar(
                      backgroundImage: user.photoUrl != null
                          ? NetworkImage(user.photoUrl!)
                          : null,
                      child: user.photoUrl == null
                          ? Text(user.initials)
                          : null,
                    ),
                    title: Text(user.fullName),
                    subtitle: isCreator ? const Text('Organisateur') : null,
                  );
                },
              );
            },
          ),
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('Fermer'),
          ),
        ],
      ),
    );
  }