Add top CPU and RAM process monitoring to System widget

- Implement get_top_cpu_process() and get_top_ram_process() functions in SystemCollector
- Add top_cpu_process and top_ram_process fields to SystemSummary data structure
- Update System widget to display top processes as description rows
- Show process name and percentage usage for highest CPU and RAM consumers
- Skip kernel threads and filter out processes with minimal usage (<0.1%)

dashboard/src/data/metrics.rs

@@ -60,6 +60,10 @@ pub struct SystemSummary {
     pub cpu_cstate: Option<Vec<String>>,
     #[serde(default)]
     pub logged_in_users: Option<Vec<String>>,
+    #[serde(default)]
+    pub top_cpu_process: Option<String>,
+    #[serde(default)]
+    pub top_ram_process: Option<String>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]

dashboard/src/ui/services.rs

@@ -109,10 +109,10 @@ 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" {
-                    match (&svc.latency_ms, &svc.description) {
-                        (Some(latency), _) => format!("{} {:.0}ms", svc.name, latency),
-                        (None, Some(desc)) if !desc.is_empty() => format!("{} {}", svc.name, desc[0]),
-                        _ => svc.name.clone(),
+                    match &svc.latency_ms {
+                        Some(latency) if *latency >= 5000.0 => format!("{} unreachable", svc.name), // Timeout (5s+)
+                        Some(latency) => format!("{} {:.0}ms", svc.name, latency),
+                        None => format!("{} unreachable", svc.name), // Connection failed
                     }
                 } else {
                     svc.name.clone()

dashboard/src/ui/system.rs

@@ -90,6 +90,16 @@ fn render_metrics(
             description_lines.push(user_line);
         }
     }
+    
+    // Add top CPU process
+    if let Some(cpu_proc) = &summary.top_cpu_process {
+        description_lines.push(format!("Top CPU: {}", cpu_proc));
+    }
+    
+    // Add top RAM process
+    if let Some(ram_proc) = &summary.top_ram_process {
+        description_lines.push(format!("Top RAM: {}", ram_proc));
+    }
 
     system_dataset.add_row(
         overall_status.clone(),