Add history chat thread remove button in the chat side nav

- Added a trash icon to the right of the chat thread name to remove a thread history.
- Added 2 icon size constants in SidebarThreadSelector.tsx to avoid the usage of magic numbers.

src/vs/workbench/contrib/void/browser/chatThreadService.ts

@@ -156,6 +156,7 @@ export interface IChatThreadService {
 	getCurrentThread(): ChatThreads[string];
 	openNewThread(): void;
 	switchToThread(threadId: string): void;
+	deleteThreadById(threadId: string): void;
 
 	// you can edit multiple messages
 	// the one you're currently editing is "focused", and we add items to that one when you press cmd+L.
@@ -281,6 +282,40 @@ class ChatThreadService extends Disposable implements IChatThreadService {
 		this._storageService.store(THREAD_STORAGE_KEY, JSON.stringify(threads), StorageScope.APPLICATION, StorageTarget.USER)
 	}
 
+	public deleteThreadById(threadId: string): void {
+		const { allThreads, currentThreadId } = this.state
+		const newThreads = { ...allThreads }
+		if (threadId in newThreads) {
+			delete newThreads[threadId]
+		}
+
+		// If we're deleting the current thread, switch to another thread first
+		const needsThreadSwitch = threadId === currentThreadId
+		let newCurrentThreadId = currentThreadId
+
+		if (needsThreadSwitch) {
+			// Find another thread to switch to
+			const remainingThreadIds = Object.keys(newThreads)
+			if (remainingThreadIds.length > 0) {
+				// Switch to the most recently modified thread
+				newCurrentThreadId = remainingThreadIds.sort((threadId1, threadId2) =>
+					newThreads[threadId2].lastModified > newThreads[threadId1].lastModified ? 1 : -1
+				)[0]
+			} else {
+				// If no threads left, create a new one
+				const newThread = newThreadObject()
+				newThreads[newThread.id] = newThread
+				newCurrentThreadId = newThread.id
+			}
+		}
+
+		this._storeAllThreads(newThreads)
+		this._setState({
+			allThreads: newThreads,
+			currentThreadId: newCurrentThreadId
+		}, true)
+	}
+
 	// this should be the only place this.state = ... appears besides constructor
 	private _setState(state: Partial<ThreadsState>, affectsCurrent: boolean) {
 		this.state = {

src/vs/workbench/contrib/void/browser/react/src/sidebar-tsx/SidebarChat.tsx

@@ -138,6 +138,36 @@ export const IconLoading = ({ className = '' }: { className?: string }) => {
 
 }
 
+export const IconTrash = ({
+	size,
+	className = '',
+	onClick
+}: {
+	size: number,
+	className?: string,
+	onClick?: (event: React.MouseEvent<SVGElement, MouseEvent>) => void
+}) => {
+	return (
+		<svg
+			className={className}
+			// These props are necessary to prevent the icon from being 'transparent'.
+			stroke="currentColor"
+			fill="currentColor"
+			strokeWidth="0"
+			viewBox="0 0 16 16"
+			width={size}
+			height={size}
+			xmlns="http://www.w3.org/2000/svg"
+			onClick={onClick}
+		>
+			<path
+				fillRule="evenodd"
+				clipRule="evenodd"
+				d="M10 3h3v1h-1v9l-1 1H4l-1-1V4H2V3h3V2a1 1 0 0 1 1-1h3a1 1 0 0 1 1 1v1zM9 2H6v1h3V2zM4 13h7V4H4v9zm2-8H5v7h1V5zm1 0h1v7H7V5zm2 0h1v7H9V5z"
+			/>
+		</svg>
+	);
+};
 
 interface VoidChatAreaProps {
 	// Required

src/vs/workbench/contrib/void/browser/react/src/sidebar-tsx/SidebarThreadSelector.tsx

@@ -6,8 +6,10 @@
 import React from "react";
 import { useAccessor, useChatThreadsState } from '../util/services.js';
 import { ISidebarStateService } from '../../../sidebarStateService.js';
-import { IconX } from './SidebarChat.js';
+import { IconX, IconTrash } from './SidebarChat.js';
 
+const X_ICON_SIZE = 16
+const TRASH_ICON_SIZE = 14
 
 const truncate = (s: string) => {
 	let len = s.length
@@ -45,7 +47,7 @@ export const SidebarThreadSelector = () => {
 					onClick={() => sidebarStateService.setState({ isHistoryOpen: false })}
 				>
 					<IconX
-						size={16}
+						size={X_ICON_SIZE}
 						className="p-[1px] stroke-[2] opacity-80 text-void-fg-3 hover:brightness-95"
 					/>
 				</button>
@@ -110,6 +112,16 @@ export const SidebarThreadSelector = () => {
 									>
 										<div className='truncate'>{`${firstMsg}`}</div>
 										<div>{`\u00A0(${numMessages})`}</div>
+										<IconTrash
+												size={TRASH_ICON_SIZE}
+												className='ml-auto'
+												onClick={(e) => {
+													// Prevent the click event from bubbling up to the parent button
+													// to prevent the deleted thread from being switched to.
+													e.stopPropagation();
+													chatThreadsService.deleteThreadById(pastThread.id);
+												}}
+											/>
 									</button>
 								</li>
 							);