Add debug logging to HeartbeatPopup in UptimeStatusIsland for production insights

- Introduced console logs to track incoming data and formatted time outputs.
- Aimed at enhancing visibility into the component's behavior during runtime.

src/components/UptimeStatusIsland.jsx

@@ -121,9 +121,14 @@ function formatLocalTime(rawTime, zone = 'utc') {
 }
 
 function HeartbeatPopup({ hb, userZone, monitor }) {
+  // Debug logging to see what data we're receiving
+  console.log('HeartbeatPopup PROD DEBUG:', { hb, userZone, hasTime: !!hb?.time });
+  
   const localTime = hb ? formatLocalTime(hb.time, userZone) : '';
   const utcTime = hb ? formatLocalTime(hb.time, 'utc') : '';
   
+  console.log('HeartbeatPopup PROD DEBUG - Results:', { localTime, utcTime });
+  
   return (
     <div style={{ minWidth: 220 }}>
       <div style={{ display: 'flex', alignItems: 'center', marginBottom: 4 }}>