Add SSH connection check to CPU usage script

Author: isontheline

_posts/2025-05-10-cpu-usage.md

@@ -30,6 +30,14 @@ capabilities:
   - vars_set
 script: |
   (function() {
+    // Check if the SSH connection is active, if not, return empty label and default icon
+    if (!$ssh.isConnected()) {
+      return { 
+        label: '', 
+        icon: 'tachometer' 
+      };
+    }
+
     /**
     * Parse the first “cpu” line of /proc/stat and compute
     * - total time (sum of all fields)