Method getHistory

utils/historyStorage.ts:13–23

()

export class HistoryStorage {
  static getHistory(): HistoryRecord[] {
    if (typeof window === 'undefined') return [];
    
    try {
      const stored = localStorage.getItem(STORAGE_KEY);
      return stored ? JSON.parse(stored) : [];
    } catch (error) {
      console.error('Error reading history from localStorage:', error);
      return [];
    }
  }

  static saveRecord(input: string, output: string): string {
    if (typeof window === 'undefined') return '';