fix(canvas): keep launch payload on first chat mount for auto-send

components/canvas/CanvasChatPanel.tsx

@@ -1182,6 +1182,7 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
   const autoContextRef = useRef<string | null>(null);
   const pendingLaunchRef = useRef<CanvasLaunchPayload | null>(null);
   const [launchAutoSendTick, setLaunchAutoSendTick] = useState(0);
+  const hasInitializedChatStateRef = useRef(false);
   const sessionMenuRef = useRef<HTMLDivElement>(null);
   const historyScrollTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
   
@@ -2681,6 +2682,11 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
   const hasHydratedHistoryRef = useRef(false);
 
   useEffect(() => {
+    if (!hasInitializedChatStateRef.current) {
+      hasInitializedChatStateRef.current = true;
+      return;
+    }
+
     loadedHistorySignatureRef.current = "";
     processedMessageIds.current.clear();
     hasHydratedHistoryRef.current = false;