hasCloseAlternatives property
Checks if there are close alternative predictions.
Returns true if there's another species with probability within
0.2 of the top prediction, indicating potential ambiguity.
Implementation
bool get hasCloseAlternatives {
final alternatives = alternativeSpecies;
if (alternatives.isEmpty) return false;
final topAlternative = alternatives.values.first;
return (topProbability - topAlternative) < 0.2;
}