memory cleanup (#4190)

* memory cleaanup

* forgot to run linter

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

@@ -8,6 +8,8 @@ import { VSCodeButton } from "@vscode/webview-ui-toolkit/react"
 import useSound from "use-sound"
 import { LRUCache } from "lru-cache"
 
+import { useDebounceEffect } from "@src/utils/useDebounceEffect"
+
 import type { ClineAsk, ClineMessage } from "@roo-code/types"
 
 import { ClineSayBrowserAction, ClineSayTool, ExtensionMessage } from "@roo/ExtensionMessage"
@@ -154,6 +156,7 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 			ttl: 1000 * 60 * 15, // 15 minutes TTL for long-running tasks
 		}),
 	)
+	const autoApproveTimeoutRef = useRef<NodeJS.Timeout | null>(null)
 
 	const clineAskRef = useRef(clineAsk)
 	useEffect(() => {
@@ -408,6 +411,12 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 		everVisibleMessagesTsRef.current.clear() // Clear for new task
 	}, [task?.ts])
 
+	useEffect(() => {
+		if (isHidden) {
+			everVisibleMessagesTsRef.current.clear()
+		}
+	}, [isHidden])
+
 	useEffect(() => () => everVisibleMessagesTsRef.current.clear(), [])
 
 	useEffect(() => {
@@ -714,17 +723,15 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 	// NOTE: the VSCode window needs to be focused for this to work.
 	useMount(() => textAreaRef.current?.focus())
 
-	useEffect(() => {
-		const timer = setTimeout(() => {
+	useDebounceEffect(
+		() => {
 			if (!isHidden && !sendingDisabled && !enableButtons) {
 				textAreaRef.current?.focus()
 			}
-		}, 50)
-
-		return () => {
-			clearTimeout(timer)
-		}
-	}, [isHidden, sendingDisabled, enableButtons])
+		},
+		50,
+		[isHidden, sendingDisabled, enableButtons]
+	)
 
 	const visibleMessages = useMemo(() => {
 		const newVisibleMessages = modifiedMessages.filter((message) => {
@@ -1086,6 +1093,14 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 		[],
 	)
 
+	useEffect(() => {
+		return () => {
+			if (scrollToBottomSmooth && typeof (scrollToBottomSmooth as any).cancel === 'function') {
+				(scrollToBottomSmooth as any).cancel()
+			}
+		}
+	}, [scrollToBottomSmooth])
+
 	const scrollToBottomAuto = useCallback(() => {
 		virtuosoRef.current?.scrollTo({
 			top: Number.MAX_SAFE_INTEGER,
@@ -1124,13 +1139,13 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 	)
 
 	useEffect(() => {
-		let timerId: NodeJS.Timeout | undefined
+		let timer: NodeJS.Timeout | undefined
 		if (!disableAutoScrollRef.current) {
-			timerId = setTimeout(() => scrollToBottomSmooth(), 50)
+			timer = setTimeout(() => scrollToBottomSmooth(), 50)
 		}
 		return () => {
-			if (timerId) {
-				clearTimeout(timerId)
+			if (timer) {
+				clearTimeout(timer)
 			}
 		}
 	}, [groupedMessages.length, scrollToBottomSmooth])
@@ -1151,21 +1166,23 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 	// Effect to handle showing the checkpoint warning after a delay
 	useEffect(() => {
 		// Only show the warning when there's a task but no visible messages yet
-		if (task && modifiedMessages.length === 0 && !isStreaming) {
+		if (task && modifiedMessages.length === 0 && !isStreaming && !isHidden) {
 			const timer = setTimeout(() => {
 				setShowCheckpointWarning(true)
 			}, 5000) // 5 seconds
 
 			return () => clearTimeout(timer)
+		} else {
+			setShowCheckpointWarning(false)
 		}
-	}, [task, modifiedMessages.length, isStreaming])
+	}, [task, modifiedMessages.length, isStreaming, isHidden])
 
 	// Effect to hide the checkpoint warning when messages appear
 	useEffect(() => {
-		if (modifiedMessages.length > 0 || isStreaming) {
+		if (modifiedMessages.length > 0 || isStreaming || isHidden) {
 			setShowCheckpointWarning(false)
 		}
-	}, [modifiedMessages.length, isStreaming])
+	}, [modifiedMessages.length, isStreaming, isHidden])
 
 	const placeholderText = task ? t("chat:typeMessage") : t("chat:typeTask")
 
@@ -1239,31 +1256,26 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 	)
 
 	useEffect(() => {
-		// Only proceed if we have an ask and buttons are enabled.
+		if (autoApproveTimeoutRef.current) {
+			clearTimeout(autoApproveTimeoutRef.current)
+			autoApproveTimeoutRef.current = null
+		}
+
 		if (!clineAsk || !enableButtons) {
 			return
 		}
 
 		const autoApprove = async () => {
 			if (lastMessage?.ask && isAutoApproved(lastMessage)) {
-				// Note that `isAutoApproved` can only return true if
-				// lastMessage is an ask of type "browser_action_launch",
-				// "use_mcp_server", "command", or "tool".
-
-				// Add delay for write operations.
 				if (lastMessage.ask === "tool" && isWriteToolAction(lastMessage)) {
-					await new Promise((resolve) => setTimeout(resolve, writeDelayMs))
-					if (!isMountedRef.current) {
-						return
-					}
+					await new Promise<void>((resolve) => {
+						autoApproveTimeoutRef.current = setTimeout(resolve, writeDelayMs)
+					})
 				}
 
-				vscode.postMessage({ type: "askResponse", askResponse: "yesButtonClicked" })
+				if (autoApproveTimeoutRef.current === null || autoApproveTimeoutRef.current) {
+					vscode.postMessage({ type: "askResponse", askResponse: "yesButtonClicked" })
 
-				// This is copied from `handlePrimaryButtonClick`, which we used
-				// to call from `autoApprove`. I'm not sure how many of these
-				// things are actually needed.
-				if (isMountedRef.current) {
 					setSendingDisabled(true)
 					setClineAsk(undefined)
 					setEnableButtons(false)
@@ -1271,6 +1283,13 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 			}
 		}
 		autoApprove()
+
+		return () => {
+			if (autoApproveTimeoutRef.current) {
+				clearTimeout(autoApproveTimeoutRef.current)
+				autoApproveTimeoutRef.current = null
+			}
+		}
 	}, [
 		clineAsk,
 		enableButtons,