OtherVoiceDetailUiState
data class OtherVoiceDetailUiState(val voices: List<ERROR CLASS: Symbol not found for TextToSpeechVoice> = emptyList(), val selectedVoiceId: String = VOICE_ID_UNSPECIFIED, val isLoading: Boolean = true, val savedVoiceMissing: Boolean = false, val previewingVoiceId: String? = null)
OtherVoiceDetail 画面の表示状態。