refactor: add gateway server helper modules

src/gateway/server-utils.test.ts

@@ -0,0 +1,27 @@
+import { describe, expect, test } from "vitest";
+import { defaultVoiceWakeTriggers } from "../infra/voicewake.js";
+import { formatError, normalizeVoiceWakeTriggers } from "./server-utils.js";
+
+describe("normalizeVoiceWakeTriggers", () => {
+  test("returns defaults when input is empty", () => {
+    expect(normalizeVoiceWakeTriggers([])).toEqual(defaultVoiceWakeTriggers());
+    expect(normalizeVoiceWakeTriggers(null)).toEqual(defaultVoiceWakeTriggers());
+  });
+
+  test("trims and limits entries", () => {
+    const result = normalizeVoiceWakeTriggers(["  hello  ", "", "world"]);
+    expect(result).toEqual(["hello", "world"]);
+  });
+});
+
+describe("formatError", () => {
+  test("prefers message for Error", () => {
+    expect(formatError(new Error("boom"))).toBe("boom");
+  });
+
+  test("handles status/code", () => {
+    expect(formatError({ status: 500, code: "EPIPE" })).toBe("500 EPIPE");
+    expect(formatError({ status: 404 })).toBe("404");
+    expect(formatError({ code: "ENOENT" })).toBe("ENOENT");
+  });
+});