refactor, tab async loading on focus

front/deviceDetailsPresence.php

@@ -23,8 +23,6 @@
 
 
 <script>
-  initializeCalendar();    
-  loadPresenceData();
 
   // Force re-render calendar on tab change
   // (bugfix for render error at left panel)
@@ -234,6 +232,37 @@ function initializeCalendar() {
   })
 }
 
+// -----------------------------------------------
+// INIT with polling for panel element visibility
+// -----------------------------------------------
+
+var presencePageInitialized = false;
+
+function initDevicePresencePage() {
+  // Only proceed if the Presence tab is visible
+  if (!$('#panPresence:visible').length) {
+    return; // Exit early if nothing is visible
+  }
+
+  // Ensure initialization only happens once
+  if (presencePageInitialized) return;
+  presencePageInitialized = true;
+
+  showSpinner();
+
+  initializeCalendar();    
+  loadPresenceData();
+}
+
+// Recurring check to initialize when visible
+function devicePresencePageUpdater() {
+  initDevicePresencePage();
+
+  setTimeout(devicePresencePageUpdater, 200);
+}
+
+devicePresencePageUpdater();
+
 
 
 </script>