fix: Reserve space for monitoring chart w/ no data

...above the sys info stuff

Author: cap10morgan

src/features/instance/status/components/monitoring/MetricVisualization.tsx

@@ -124,7 +124,7 @@ export function MetricVisualization({ metricConfig, startTime, endTime, instance
 	}
 
 	return (
-		<div className="mt-8">
+		<div className="mt-8 h-[600px]">
 			<p>No {metricConfig.name} data for this time period</p>
 		</div>
 	);