Remove Format Operation

interface RemoveFormatOperation extends Operation {
  type: 'removeFormat';
  path: Path;
  length: number;
  format: string;
  previousValue?: any; // undo를 위해 이전 값 저장
}

function removeBold(editor: Editor, selection: Selection) {
  const operation: RemoveFormatOperation = {
    type: 'removeFormat',
    path: selection.start,
    length: selection.length,
    format: 'bold',
    previousValue: editor.hasFormat(selection, 'bold')
  };
  
  editor.applyOperation(operation);
}

// 역: 서식 재적용
const inverse = {
  type: 'applyFormat',
  path: selection.start,
  length: selection.length,
  format: 'bold',
  value: operation.previousValue
};