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/(marketing)/about/page.tsx

@@ -1,3 +1,4 @@
+import type { Metadata } from "next";
 import messages from "../../../messages/en/index";
 import {
   ASSETS,
@@ -6,6 +7,7 @@ import {
   structureBeforeCrisisPath,
 } from "../../../lib/assetUtils";
 import { getTranslation } from "../../../lib/i18n/getTranslation";
+import { routeMetadata } from "../../../lib/siteMetadata";
 import AboutHeader from "../../components/type/AboutHeader";
 import type { AboutHeaderSegment } from "../../components/type/AboutHeader";
 import Stats from "../../components/sections/Stats";
@@ -18,6 +20,10 @@ import type { FaqAccordionItem } from "../../components/sections/Accordion";
 import QuoteBlock from "../../components/sections/QuoteBlock";
 import AskOrganizer from "../../components/sections/AskOrganizer";
 
+export const metadata: Metadata = routeMetadata("/about", {
+  title: messages.metadata.about.title,
+});
+
 function asArray<T>(value: unknown): T[] {
   return Array.isArray(value) ? value : [];
 }