Mount Cortex OS Runtime Health as WebUI panel

static/cortex-os/runtime-health/runtime_health.css

@@ -9,6 +9,10 @@
   font: 14px/1.45 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
 }
 
+main.main:not(.svrnty-showing-cortex-os) .cortex-os-runtime-health {
+  display: none;
+}
+
 .cortex-os-runtime-health h2 {
   margin: 0 0 8px;
   font-size: 15px;

static/cortex-os/runtime-health/runtime_health.js

@@ -42,7 +42,10 @@
     panel.appendChild(summary);
     panel.appendChild(list);
 
-    var target = document.querySelector("main") || document.body;
+    var target = document.querySelector("main.main");
+    if (!target) {
+      return panel;
+    }
     target.appendChild(panel);
     return panel;
   }
@@ -99,9 +102,17 @@
       });
   }
 
-  if (document.readyState === "loading") {
-    document.addEventListener("DOMContentLoaded", loadRuntimeHealth, { once: true });
-  } else {
+  function handlePanelSwitch(event) {
+    var detail = (event && event.detail) || {};
+    if (detail.name === "cortex-os") {
+      loadRuntimeHealth();
+    }
+  }
+
+  window.addEventListener("svrnty:panel-switch", handlePanelSwitch);
+
+  var main = document.querySelector("main.main");
+  if (main && main.classList.contains("svrnty-showing-cortex-os")) {
     loadRuntimeHealth();
   }
 })();