setActiveModel method

@override void setActiveModel(ModelSpec spec)

Sets the active model for subsequent operations.

Automatically routes to inference or embedding based on spec type. For inference specs, also persists modelType + fileType so the active reference survives an app restart (#227).

Implementation

@override
void setActiveModel(ModelSpec spec) {
  if (spec is InferenceModelSpec) {
    _activeInferenceModel = spec;
    debugPrint('✅ Set active inference model: ${spec.name}');
    // Fire-and-forget — SharedPreferences write is cheap and the
    // success of the operation is already reflected in memory.
    unawaited(_persistActiveInferenceIdentity(spec));
  } else if (spec is EmbeddingModelSpec) {
    _activeEmbeddingModel = spec;
    debugPrint('✅ Set active embedding model: ${spec.name}');
    unawaited(_persistActiveEmbeddingIdentity(spec));
  } else {
    throw ArgumentError('Unknown ModelSpec type: ${spec.runtimeType}');
  }
}