Timeline timestamps now update periodically to match GitHub.com behavior. Previously, relative timestamps like "3 weeks ago" or "6 minutes ago" were static and never changed, even as time passed.

Problem

As shown in the issue screenshots, timestamps in the VS Code extension remained static:

• "3 weeks ago" stayed "3 weeks ago" indefinitely
• "6 minutes ago" never updated to "seconds ago"

On GitHub.com, these timestamps update automatically over time to reflect the current relative time.

Solution

Modified the Timestamp component to use React hooks with smart update intervals:

// Variable update intervals based on timestamp age
const getUpdateInterval = () => {
  const ageInMinutes = (now - timestamp) / (1000 * 60);
  
  if (ageInMinutes < 60) return 60000;        // 1 minute for recent items
  else if (ageInMinutes < 60 * 24) return 5 * 60000;  // 5 minutes for older items
  else return 15 * 60000;                     // 15 minutes for very old items
};

Key Features

• Automatic Updates: Timestamps refresh at appropriate intervals using setInterval
• Performance Optimized:
  • Recent timestamps (< 1 hour) update every minute
  • Older timestamps (< 1 day) update every 5 minutes
  • Very old timestamps (> 1 day) update every 15 minutes
• Visibility Detection: Updates pause when page is hidden and resume when visible
• Resource Efficient: Proper cleanup of timers and event listeners

Result

Timeline events now show dynamic timestamps that update automatically:

• "6 minutes ago" → "seconds ago" (after time passes)
• "3 weeks ago" → "seconds ago" (when viewing recently)

This provides a more accurate and GitHub.com-like experience for users viewing pull request timelines.

Fixes #7006.

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