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/rares/page.tsx

@@ -1,3 +1,4 @@
+import { getTranslations } from "next-intl/server";
 import Link from "next/link";
 import { ContentCard, EmptyState } from "@/components/public/ui";
 import { prisma } from "@/lib/prisma";
@@ -15,6 +16,7 @@ type CategoryRow = {
 };
 
 export default async function RareValuesPage() {
+  const t = await getTranslations("pages.rares");
   let categories: CategoryRow[] = [];
   try {
     categories = await prisma.websiteRareValueCategories.findMany({
@@ -45,13 +47,13 @@ export default async function RareValuesPage() {
     <main style={{ display: "grid", gap: "1.5rem" }}>
       <ContentCard
         icon="💎"
-        title="Rare values"
-        subtitle="Get an overview of all of the rares on the hotel, grouped by category."
+        title={t("title")}
+        subtitle={t("subtitle")}
       />
 
       {categories.length === 0 ? (
         <ContentCard padded={false}>
-          <EmptyState icon="💎">We currently have no rares listed here.</EmptyState>
+          <EmptyState icon="💎">{t("empty")}</EmptyState>
         </ContentCard>
       ) : (
         <div className="card-grid sm-2 lg-3">
@@ -84,12 +86,12 @@ export default async function RareValuesPage() {
                   <div className="content-card-head-text">
                     <p className="content-card-title">{c.name}</p>
                     <p className="content-card-subtitle">
-                      {count} {count === 1 ? "rare" : "rares"}
+                      {t("rareCount", { count })}
                     </p>
                   </div>
                 </div>
                 <div className="content-card-body">
-                  <span className="btn btn-outline">View rares →</span>
+                  <span className="btn btn-outline">{t("viewRares")}</span>
                 </div>
               </Link>
             );