Fix MCP e2e test (#1980)

 > [!NOTE] > <sup>[Cursor Bugbot](https://cursor.com/dashboard?tab=bugbot) is generating a summary for commit c8f494513ae9b2fedda833aeda41ed660b584f16. Configure [here](https://cursor.com/dashboard?tab=bugbot).</sup>

Fix MCP e2e test (#1980)
df785a8b · Will Chen · GitHub · 423be75d · df785a8b
--- a/e2e-tests/helpers/test_helper.ts
+++ b/e2e-tests/helpers/test_helper.ts
@@ -341,7 +341,11 @@ export class PageObject {

  async selectChatMode(mode: "build" | "ask" | "agent") {
    await this.page.getByTestId("chat-mode-selector").click();
-    await this.page.getByRole("option", { name: mode }).click();
+    await this.page
+      .getByRole("option", {
+        name: mode === "agent" ? "Build with MCP (experimental)" : mode,
+      })
+      .click();
  }

  async openContextFilesPicker() {