fix: prevent notification sound on attempt_completion with queued messages (#8540)

Co-authored-by: Roo Code <[email protected]>

Author: roomote[bot]

webview-ui/src/components/chat/ChatView.tsx

@@ -380,7 +380,8 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 							break
 						case "completion_result":
 							// extension waiting for feedback. but we can just present a new task button
-							if (!isPartial) {
+							// Only play celebration sound if there are no queued messages
+							if (!isPartial && messageQueue.length === 0) {
 								playSound("celebration")
 							}
 							setSendingDisabled(isPartial)