ata-cell-id="${cellId}"]`);
            if (cell && cell.nextElementSibling) {
                const nextCellId = cell.nextElementSibling.dataset.cellId;
                selectCell(nextCellId);
            }
        }
        
        // Modes
        function commandMode() {
            cellMode = 'command';
            const editor = editorInstances.get(currentCellId);
            if (editor) {
                editor.getInputField().blur();
            }
        }
        
        function editMode() {
  