sessions: use generic sign out confirmation copy (#307727)

* sessions: use generic sign out confirmation copy (#307465)

Allow the shared account sign-out action to accept dialog copy overrides so the Agents app can show a generic confirmation instead of listing extension usage.

Adds a focused test for the override path while preserving the default workbench confirmation behavior.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* sessions: scope sign out confirmation to Agents app (#307465)

Keep the Agents-specific sign-out confirmation flow inside the sessions account menu instead of extending the shared authentication sign-out action.

This restores the core workbench auth dialog behavior and limits the copy change to the sessions app surface.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: hawkticehurst

src/vs/sessions/contrib/accountMenu/browser/account.contribution.ts

@@ -7,6 +7,7 @@ import '../../../browser/media/sidebarActionButton.css';
 import './media/accountWidget.css';
 import './media/accountTitleBarWidget.css';
 import '../../../../workbench/contrib/chat/browser/chatStatus/media/chatStatus.css';
+import Severity from '../../../../base/common/severity.js';
 import { Disposable, DisposableStore, MutableDisposable } from '../../../../base/common/lifecycle.js';
 import { localize, localize2 } from '../../../../nls.js';
 import { Action2, MenuRegistry, registerAction2, IMenuService, MenuId } from '../../../../platform/actions/common/actions.js';
@@ -39,6 +40,9 @@ import { ThemeIcon } from '../../../../base/common/themables.js';
 import { getAccountTitleBarBadgeKey, getAccountTitleBarState } from './accountTitleBarState.js';
 import { SessionsWelcomeVisibleContext } from '../../../common/contextkeys.js';
 import { IsAuxiliaryWindowContext } from '../../../../workbench/common/contextkeys.js';
+import { IAuthenticationAccessService } from '../../../../workbench/services/authentication/browser/authenticationAccessService.js';
+import { IAuthenticationUsageService } from '../../../../workbench/services/authentication/browser/authenticationUsageService.js';
+import { IAuthenticationService } from '../../../../workbench/services/authentication/common/authentication.js';
 
 // --- Account Menu Items --- //
 const AccountMenu = new MenuId('SessionsAccountMenu');
@@ -181,7 +185,33 @@ registerAction2(class extends Action2 {
 	}
 	async run(accessor: ServicesAccessor): Promise<void> {
 		const defaultAccountService = accessor.get(IDefaultAccountService);
-		await defaultAccountService.signOut();
+		const dialogService = accessor.get(IDialogService);
+		const authenticationService = accessor.get(IAuthenticationService);
+		const authenticationUsageService = accessor.get(IAuthenticationUsageService);
+		const authenticationAccessService = accessor.get(IAuthenticationAccessService);
+		const defaultAccount = await defaultAccountService.getDefaultAccount();
+		if (!defaultAccount) {
+			return;
+		}
+
+		const providerId = defaultAccount.authenticationProvider.id;
+		const accountLabel = defaultAccount.accountName;
+		const { confirmed } = await dialogService.confirm({
+			type: Severity.Info,
+			message: localize('agenticSignOutMessage', "Sign out of the Agents app?"),
+			detail: localize('agenticSignOutDetail', "This will sign out '{0}' from the Agents app.", accountLabel),
+			primaryButton: localize({ key: 'agenticSignOutButton', comment: ['&& denotes a mnemonic'] }, "&&Sign Out")
+		});
+
+		if (!confirmed) {
+			return;
+		}
+
+		const allSessions = await authenticationService.getSessions(providerId);
+		const sessions = allSessions.filter(session => session.account.label === accountLabel);
+		await Promise.all(sessions.map(session => authenticationService.removeSession(providerId, session.id)));
+		authenticationUsageService.removeAccountUsage(providerId, accountLabel);
+		authenticationAccessService.removeAllowedExtensions(providerId, accountLabel);
 	}
 });