Secondary side bar shouldnt open by default in vscode.dev (fix microsoft#268390) (microsoft#268606)

Author: bpasero

src/vs/workbench/browser/layout.ts

@@ -632,7 +632,7 @@ export abstract class Layout extends Disposable implements IWorkbenchLayoutServi
 	private initLayoutState(lifecycleService: ILifecycleService, fileService: IFileService): void {
 		this._mainContainerDimension = getClientArea(this.parent, this.contextService.getWorkbenchState() === WorkbenchState.EMPTY ? DEFAULT_EMPTY_WINDOW_DIMENSIONS : DEFAULT_WORKSPACE_WINDOW_DIMENSIONS); // running with fallback to ensure no error is thrown (https://github.com/microsoft/vscode/issues/240242)
 
-		this.stateModel = new LayoutStateModel(this.storageService, this.configurationService, this.contextService);
+		this.stateModel = new LayoutStateModel(this.storageService, this.configurationService, this.contextService, this.environmentService);
 		this.stateModel.load({
 			mainContainerDimension: this._mainContainerDimension,
 			resetLayout: Boolean(this.layoutOptions?.resetLayout)
@@ -2789,6 +2789,7 @@ class LayoutStateModel extends Disposable {
 		private readonly storageService: IStorageService,
 		private readonly configurationService: IConfigurationService,
 		private readonly contextService: IWorkspaceContextService,
+		private readonly environmentService: IBrowserWorkbenchEnvironmentService,
 	) {
 		super();
 
@@ -2857,6 +2858,10 @@ class LayoutStateModel extends Disposable {
 		LayoutStateKeys.SIDEBAR_HIDDEN.defaultValue = workbenchState === WorkbenchState.EMPTY;
 		LayoutStateKeys.AUXILIARYBAR_SIZE.defaultValue = Math.min(300, mainContainerDimension.width / 4);
 		LayoutStateKeys.AUXILIARYBAR_HIDDEN.defaultValue = (() => {
+			if (isWeb && !this.environmentService.remoteAuthority) {
+				return true; // TODO@bpasero remove this condition once Chat web support lands
+			}
+
 			const configuration = this.configurationService.inspect(WorkbenchLayoutSettings.AUXILIARYBAR_DEFAULT_VISIBILITY);
 
 			// Unless auxiliary bar visibility is explicitly configured, make