toggleServer method
Implementation
Future<void> toggleServer(String id, bool enabled) async {
final idx = _servers.indexWhere((s) => s.id == id);
if (idx != -1) {
_servers[idx] = _servers[idx].copyWith(enabled: enabled);
await _storage.saveServers(_servers);
await _syncMcpServers();
notifyListeners();
}
}