// Factor-based conversion for linear units
if ('factor' in fromUnitData && 'factor' in toUnitData) {
  const baseValue = value / fromUnitData.factor;
  result = baseValue * toUnitData.factor;
}

// Custom conversion for temperature
celsius: { 
  convert: (val: number, to: string) => {
    if (to === 'fahrenheit') return (val * 9/5) + 32;
    if (to === 'kelvin') return val + 273.15;
    return val;
  }
}

// Number base conversion for programming
decimal: { 
  convert: (val: number, to: string) => {
    const num = Math.floor(val);
    if (to === 'binary') return parseInt(num.toString(2));
    if (to === 'hexadecimal') return num.toString(16).toUpperCase();
    return val;
  }
}