---

private var searchJob: kotlinx.coroutines.Job? = null

fun loadNotes() {
    searchJob?.cancel()
    searchJob = viewModelScope.launch {
        _uiState.value = NotesUiState.Loading
        repository.observeAll().collect { notes ->
            _uiState.value = if (notes.isEmpty()) NotesUiState.Empty
                              else NotesUiState.Success(notes)
        }
    }
}

fun searchNotes(query: String) {
    searchJob?.cancel()
    if (query.isBlank()) {
        loadNotes()
        return
    }
    searchJob = viewModelScope.launch {
        repository.search(query).collect { notes ->
            _uiState.value = if (notes.isEmpty()) NotesUiState.Empty
                              else NotesUiState.Success(notes)
        }
    }
}