Canvas: Check agent health

Change-Id: I429eecebde1d661513dfd94e27cdaa820bd49493
diff --git a/apps/canvas/front/src/components/ChatBubble.tsx b/apps/canvas/front/src/components/ChatBubble.tsx
index 74e3605..24d8432 100644
--- a/apps/canvas/front/src/components/ChatBubble.tsx
+++ b/apps/canvas/front/src/components/ChatBubble.tsx
@@ -177,6 +177,7 @@
 			</div>
 			{isExpanded && (
 				<div className={iframeContainerClasses}>
+					// TODO(gio): use AgentIframe
 					<iframe
 						src={agentUrl}
 						title={agentName}