feat: deep-agent canvas, live observability, and multi-environment tooling

Self-hosted platform for building, testing, and shipping LangChain/LangGraph agents. Deep-agent sub-agents on the canvas, a live tracing/observability timeline, auto-provisioned built-in tools with import/export, per-environment tool variables, streamed evaluations, and per-user auth token forwarding.

apps/web/test/setup.ts

@@ -0,0 +1,15 @@
+import "@testing-library/jest-dom/vitest";
+import { cleanup } from "@testing-library/react";
+import { afterEach, vi } from "vitest";
+
+afterEach(() => cleanup());
+
+Object.defineProperty(HTMLElement.prototype, "scrollTo", {
+  configurable: true,
+  value: vi.fn(),
+});
+
+Object.defineProperty(window, "confirm", {
+  configurable: true,
+  value: vi.fn(() => true),
+});