diff --git a/next.config.ts b/next.config.ts
index 76f79b8..d48ee98 100644
--- a/next.config.ts
+++ b/next.config.ts
@@ -178,7 +178,14 @@ const nextConfig: NextConfig = {
   output: "standalone",
   // Keep pino and pino-pretty as native Node.js requires so their worker-thread
   // transport and stream internals work correctly inside the standalone bundle.
-  serverExternalPackages: ["pino", "pino-pretty", "drizzle-orm", "postgres"],
+  serverExternalPackages: [
+    "pino",
+    "pino-pretty",
+    "drizzle-orm",
+    "postgres",
+    "isomorphic-dompurify",
+    "jsdom",
+  ],
 };
 
 export default nextConfig;
diff --git a/tests/e2e/assistant.spec.ts b/tests/e2e/assistant.spec.ts
index c08f1ea..677cb9e 100644
--- a/tests/e2e/assistant.spec.ts
+++ b/tests/e2e/assistant.spec.ts
@@ -1,4 +1,13 @@
-import { expect, test } from "@playwright/test";
+import { expect, test, type Page } from "@playwright/test";
+
+async function ensureSignedIn(page: Page) {
+  await page.goto("/");
+  const devLogin = page.getByRole("button", { name: "Dev login" });
+  if (await devLogin.isVisible().catch(() => false)) {
+    await devLogin.click();
+    await page.waitForURL((url) => !url.pathname.startsWith("/login"));
+  }
+}
 
 test("assistant bubble is hidden until opted in", async ({ page }) => {
   await page.goto("/");
@@ -6,11 +15,13 @@ test("assistant bubble is hidden until opted in", async ({ page }) => {
 });
 
 test("assistant chat smoke after opt-in", async ({ page }) => {
+  await ensureSignedIn(page);
   await page.goto("/settings?s=appearance");
   const assistantSwitch = page.getByRole("switch", { name: "AI assistant" });
   if (!(await assistantSwitch.isChecked())) {
     await assistantSwitch.click();
   }
+  await expect(assistantSwitch).toBeChecked();
 
   await page.goto("/");
   await page.getByRole("button", { name: "Open assistant" }).click();