Add Status::Inactive for inactive services with empty circle display

- Add new Status::Inactive variant to enum for better service state representation
- Agent now assigns Status::Inactive instead of Status::Warning for inactive services
- Dashboard displays inactive services with empty circle (○) icon in gray color
- User-stopped services still show as Status::Ok with green filled circle
- Inactive services treated as OK for host status aggregation
- Improves visual clarity between active (●), inactive (○), and warning (◐) states

dashboard/src/ui/widgets/services.rs

@@ -144,6 +144,7 @@ impl ServicesWidget {
         let icon = StatusIcons::get_icon(info.widget_status);
         let status_color = match info.widget_status {
             Status::Ok => Theme::success(),
+            Status::Inactive => Theme::muted_text(),
             Status::Pending => Theme::highlight(),
             Status::Warning => Theme::warning(),
             Status::Critical => Theme::error(),