add New Chat alert, remove will continue in bg as it's no longer needed and can override other (#286837)

Author: meganrogge

src/vs/workbench/contrib/chat/browser/accessibility/chatAccessibilityService.ts

@@ -50,7 +50,6 @@ export class ChatAccessibilityService extends Disposable implements IChatAccessi
 			if (!requestInProgress) {
 				return;
 			}
-			alert(localize('chat.backgroundRequest', "Chat session will continue in the background."));
 			this.disposeRequest(e);
 		}));
 	}

src/vs/workbench/contrib/chat/browser/actions/chatNewActions.ts

@@ -6,7 +6,8 @@
 import { Codicon } from '../../../../../base/common/codicons.js';
 import { KeyCode, KeyMod } from '../../../../../base/common/keyCodes.js';
 import { ServicesAccessor } from '../../../../../editor/browser/editorExtensions.js';
-import { localize2 } from '../../../../../nls.js';
+import { localize, localize2 } from '../../../../../nls.js';
+import { IAccessibilityService } from '../../../../../platform/accessibility/common/accessibility.js';
 import { Action2, MenuId, MenuRegistry, registerAction2 } from '../../../../../platform/actions/common/actions.js';
 import { CommandsRegistry } from '../../../../../platform/commands/common/commands.js';
 import { ContextKeyExpr } from '../../../../../platform/contextkey/common/contextkey.js';
@@ -112,6 +113,8 @@ export function registerNewChatActions() {
 		}
 
 		async run(accessor: ServicesAccessor, ...args: unknown[]) {
+			const accessibilityService = accessor.get(IAccessibilityService);
+
 			const executeCommandContext = args[0] as INewEditSessionActionContext | undefined;
 
 			// Context from toolbar or lastFocusedWidget
@@ -134,6 +137,8 @@ export function registerNewChatActions() {
 			widget.input.relatedFiles?.clear();
 			widget.focusInput();
 
+			accessibilityService.alert(localize('newChat', "New chat"));
+
 			if (!executeCommandContext) {
 				return;
 			}