Fix transitional icons and selection highlighting visibility

Resolved issues with transitional service icons not being properly visible:

- Removed 3-second timeout that was clearing pending transitions prematurely
- Fixed selection highlighting disappearing when transitional icons appeared
- Implemented conditional coloring for transitional icons:
  - Blue when service is not selected
  - Dark background color when service is selected (for visibility against blue selection)
- Transitions now persist until actual service status changes occur

Both selection highlighting and transitional icons are now visible simultaneously.

dashboard/src/ui/mod.rs

@@ -462,15 +462,9 @@ impl TuiApp {
     fn clear_completed_transitions(&mut self, hostname: &str, service_metrics: &[&Metric]) {
         if let Some(host_widgets) = self.host_widgets.get_mut(hostname) {
             let mut completed_services = Vec::new();
-            let now = Instant::now();
             
-            // Check each pending transition to see if real status has changed or timed out
-            for (service_name, (command_type, original_status, start_time)) in &host_widgets.pending_service_transitions {
-                // Clear if too much time has passed (3 seconds for redundant commands)
-                if now.duration_since(*start_time).as_secs() > 3 {
-                    completed_services.push(service_name.clone());
-                    continue;
-                }
+            // Check each pending transition to see if real status has changed
+            for (service_name, (command_type, original_status, _start_time)) in &host_widgets.pending_service_transitions {
                 
                 // Look for status metric for this service
                 for metric in service_metrics {