Give each route its own title and canonical, and add robots.txt plus a sitemap.

The root layout was stamping the homepage title and production root onto every page. Routes now supply a page segment through one em-dash template, canonicals follow the request path, and non-production hosts disallow crawlers.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/(app)/login/layout.tsx

@@ -1,9 +1,11 @@
 import type { Metadata } from "next";
+import messages from "../../../messages/en/index";
+import { NO_INDEX_ROBOTS, routeMetadata } from "../../../lib/siteMetadata";
 
-export const metadata: Metadata = {
-  title: "Log in · CommunityRule",
-  robots: { index: false, follow: false },
-};
+export const metadata: Metadata = routeMetadata("/login", {
+  title: messages.metadata.login.title,
+  robots: NO_INDEX_ROBOTS,
+});
 
 export default function LoginLayout({
   children,