Function formatUnixTimestamp

src/lib/date-utils.ts:9–42

(timestamp: number)

 * formatUnixTimestamp(1735555200) // "Dec 30, 2024"
 */
export function formatUnixTimestamp(timestamp: number): string {
  const date = new Date(timestamp * 1000);
  const now = new Date();
  
  // If it's today, show time
  if (isToday(date)) {
    return formatTime(date);
  }
  
  // If it's yesterday
  if (isYesterday(date)) {
    return `Yesterday, ${formatTime(date)}`;
  }
  
  // If it's within the last week, show day of week
  if (isWithinWeek(date)) {
    return `${getDayName(date)}, ${formatTime(date)}`;
  }
  
  // If it's this year, don't show year
  if (date.getFullYear() === now.getFullYear()) {
    return date.toLocaleDateString('en-US', { 
      month: 'short', 
      day: 'numeric' 
    });
  }
  
  // Otherwise show full date
  return date.toLocaleDateString('en-US', { 
    month: 'short', 
    day: 'numeric',
    year: 'numeric'
  });
}

/**
 * Formats an ISO timestamp string to a human-readable date