fix: reset condensing state when switching tasks (#6922)

Previously, when users initiated context condensing and switched to another task before completion, the 'condensing context' indicator would persist on the new task.

This fix ensures the condensing state is properly reset in the task switching effect, preventing the indicator from appearing incorrectly on different tasks.

Author: f14XuanLv

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

@@ -434,9 +434,12 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 	}, [messages.length])
 
 	useEffect(() => {
+		// Reset UI states
 		setExpandedRows({})
 		everVisibleMessagesTsRef.current.clear() // Clear for new task
 		setCurrentFollowUpTs(null) // Clear follow-up answered state for new task
+		setIsCondensing(false) // Reset condensing state when switching tasks
+		// Note: sendingDisabled is not reset here as it's managed by message effects
 
 		// Clear any pending auto-approval timeout from previous task
 		if (autoApproveTimeoutRef.current) {