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/vitest.config.mts

@@ -0,0 +1,18 @@
+import { fileURLToPath } from "node:url";
+import react from "@vitejs/plugin-react";
+import { defineConfig } from "vitest/config";
+
+const appRoot = fileURLToPath(new URL(".", import.meta.url));
+
+export default defineConfig({
+  plugins: [react()],
+  resolve: {
+    alias: { "@": appRoot },
+  },
+  test: {
+    environment: "jsdom",
+    setupFiles: ["./test/setup.ts"],
+    include: ["test/**/*.test.ts", "test/**/*.test.tsx"],
+    restoreMocks: true,
+  },
+});