i18n: translate all public page bodies (EN + IT)

Internationalised the ~44 public pages with next-intl (the shell was
already translated). Each page now pulls its copy from a "pages.<slug>"
namespace via getTranslations (server) / useTranslations (client); the
EN + IT catalogs were authored by parallel agents and merged centrally,
with natural Italian (ICU plurals) and it backfilled from en for any
gap. request.ts gained getMessageFallback/onError so a missing key
degrades to the English value, never a raw key.

Behaviour unchanged (only display text moved to t() calls; queries,
actions, fields, ContentCard structure preserved). Verified on the prod
server: with NEXT_LOCALE=it, home/community/staff/news/shop/rankings all
render Italian copy, no raw-key leakage; English unchanged. The nav
language switcher toggles EN/IT live. tsc 0, vitest 49/49, next build 0.

Admin pages intentionally left in English (staff tooling).

src/app/badges/page.tsx

@@ -1,3 +1,4 @@
+import { getTranslations } from "next-intl/server";
 import { ContentCard, EmptyState } from "@/components/public/ui";
 import { prisma } from "@/lib/prisma";
 
@@ -9,6 +10,8 @@ export const metadata = { title: "Badges" };
 const BADGE_IMG_BASE = "https://images.habbo.com/c_images/album1584";
 
 export default async function BadgesPage() {
+  const t = await getTranslations("pages.badges");
+
   const badges = await prisma.websiteBadges
     .findMany({
       orderBy: { badgeName: "asc" },
@@ -19,13 +22,13 @@ export default async function BadgesPage() {
     <main style={{ display: "grid", gap: "1.5rem" }}>
       <ContentCard
         icon="🏅"
-        title="Badges"
-        subtitle="The badges you can earn and show off around the hotel"
+        title={t("title")}
+        subtitle={t("subtitle")}
       />
 
       <ContentCard padded={badges.length === 0}>
         {badges.length === 0 ? (
-          <EmptyState icon="🏅">No badges available yet.</EmptyState>
+          <EmptyState icon="🏅">{t("noBadges")}</EmptyState>
         ) : (
           <div className="card-grid sm-2 lg-3" style={{ padding: "1rem" }}>
             {badges.map((badge) => (