feat(landing): show animated live demo stats counters

Add a "Live from the demo instance" section to the landing page that
fetches feeds_created and emails_received from the demo /api/stats and
counts them up on scroll into view. Make /api/stats publicly readable
(CORS *) and refresh the stale allowlist origins to kill-the.news.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/index.ts

@@ -22,7 +22,7 @@ import { FORWARD_EMAIL_IPS_CACHE_TTL_MS } from "./config/constants";
 
 type AppEnv = { Bindings: Env };
 
-const ALLOWED_ORIGINS = ["https://getmynews.app", "https://www.getmynews.app"];
+const ALLOWED_ORIGINS = ["https://kill-the.news", "https://www.kill-the.news"];
 
 // Fallback ForwardEmail.net IP addresses in case API fetch fails
 const FALLBACK_FORWARD_EMAIL_IPS = [
@@ -140,7 +140,8 @@ api.use("/inbound", async (c, next) => {
 // API routes (inbound webhook)
 api.post("/inbound", handleInbound);
 
-// Public monitoring stats (JSON)
+// Public monitoring stats (JSON) — readable from any origin (landing page, embeds)
+api.use("/stats", cors({ origin: "*" }));
 api.get("/stats", handleStats);
 
 // RSS feed routes (public)