Support Beta release channel (#591)

e2e-tests/release_channel.spec.ts

@@ -0,0 +1,22 @@
+import { expect } from "@playwright/test";
+import { test } from "./helpers/test_helper";
+
+test("release channel - change from stable to beta and back", async ({
+  po,
+}) => {
+  await po.goToSettingsTab();
+
+  // Change to beta channel
+  await po.changeReleaseChannel("beta");
+  await expect(
+    po.page.getByRole("button", { name: "Restart Dyad" }),
+  ).toBeVisible();
+  await po.snapshotSettings();
+
+  // Change back to stable channel
+  await po.changeReleaseChannel("stable");
+  await expect(
+    po.page.getByRole("button", { name: "Download Stable" }),
+  ).toBeVisible();
+  await po.snapshotSettings();
+});