feat: add PWA manifest and service worker routes with coverage

test/app.test.js

@@ -44,6 +44,21 @@ test("rejects invalid X webhook signature", () => {
   assert.equal(response.status, 401);
 });
 
+test("serves pwa manifest route", () => {
+  const app = createApp();
+  const response = app.handleRequest({
+    method: "GET",
+    path: "/manifest.webmanifest",
+    headers: {},
+    rawBody: "",
+  });
+
+  assert.equal(response.status, 200);
+  assert.match(response.headers["content-type"], /application\/manifest\+json/);
+  const body = JSON.parse(response.body);
+  assert.equal(body.short_name, "XArtAudio");
+});
+
 test("X webhook returns not_article response and no charge", () => {
   const app = createApp();
   postJSON(app, "/api/webhooks/polar", { userId: "u1", credits: 5, eventId: "evt1" }, "polar-secret");