Show archive count range to detect inconsistencies

- Display single number if all services have same count
- Display min-max range if counts differ (indicates problem)

dashboard/src/ui/widgets/system.rs

@@ -566,9 +566,15 @@ impl SystemWidget {
             }
 
             // Show usage with status and archive count
+            let archive_display = if disk.archives_min == disk.archives_max {
+                format!("{}", disk.archives_min)
+            } else {
+                format!("{}-{}", disk.archives_min, disk.archives_max)
+            };
+
             let usage_text = format!(
                 "Usage: ({}) {:.0}% {:.0}GB/{:.0}GB",
-                disk.total_archives,
+                archive_display,
                 disk.disk_usage_percent,
                 disk.disk_used_gb,
                 disk.disk_total_gb