Refactor: update isSessionsWindow getter to use payload for dynamic value

scripts/code-sessions-web.js

@@ -136,6 +136,11 @@ ${importMapJson}
 				nameLong: 'Sessions (Web)',
 				enableTelemetry: false,
 			},
+			workspaceProvider: {
+				workspace: undefined,
+				open: async () => false,
+				payload: [['isSessionsWindow', 'true']],
+			},
 		});
 	</script>
 </body>

src/vs/workbench/services/environment/browser/environmentService.ts

@@ -255,7 +255,7 @@ export class BrowserWorkbenchEnvironmentService implements IBrowserWorkbenchEnvi
 	get disableWorkspaceTrust(): boolean { return !this.options.enableWorkspaceTrust; }
 
 	@memoize
-	get isSessionsWindow(): boolean { return false; }
+	get isSessionsWindow(): boolean { return this.payload?.get('isSessionsWindow') === 'true'; }
 
 	@memoize
 	get profile(): string | undefined { return this.payload?.get('profile'); }