clearActiveTtsIdentity method

@override Future<void> clearActiveTtsIdentity()

Clears the active TTS identity (in-memory spec + persisted prefs).

See clearActiveInferenceIdentity: default throws rather than silently no-op'ing, so a non-overriding implementer fails loudly instead of leaving a stale persisted identity.

Implementation

@override
Future<void> clearActiveTtsIdentity() async {
  await _ensureInitialized();
  try {
    final prefs = await SharedPreferences.getInstance();
    await prefs.remove(PreferencesKeys.activeTtsName);
    await prefs.remove(PreferencesKeys.activeTtsModelType);
    _activeTtsModel = null;
  } catch (e) {
    gemmaLog('[ModelManager] clearActiveTtsIdentity failed: $e');
    rethrow;
  }
  gemmaLog('Active TTS identity cleared');
}