Remove nginx site accessibility filtering to monitor all sites

- Remove check_site_accessibility function and filtering logic
- Monitor ALL nginx sites from config regardless of current status
- Site status determined by measure_site_latency, not accessibility filter
- Fixes missing git.cmtec.se when backend is down (502 errors)
- Sites with errors now show as failed instead of being filtered out

dashboard/src/ui/services.rs

@@ -109,10 +109,17 @@ fn render_metrics(
             // Add latency information for nginx sites if available
             let service_name_with_latency = if let Some(parent) = &svc.sub_service {
                 if parent == "nginx" {
+                    // Extract subdomain part for shorter display
+                    let short_name = if let Some(dot_pos) = svc.name.find('.') {
+                        &svc.name[..dot_pos]
+                    } else {
+                        &svc.name
+                    };
+                    
                     match &svc.latency_ms {
-                        Some(latency) if *latency >= 2000.0 => format!("{} → unreachable", svc.name), // Timeout (2s+)
-                        Some(latency) => format!("{} → {:.0}ms", svc.name, latency),
-                        None => format!("{} → unreachable", svc.name), // Connection failed
+                        Some(latency) if *latency >= 2000.0 => format!("{} → unreachable", short_name), // Timeout (2s+)
+                        Some(latency) => format!("{} → {:.0}ms", short_name, latency),
+                        None => format!("{} → unreachable", short_name), // Connection failed
                     }
                 } else {
                     svc.name.clone()