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/friends/page.tsx

@@ -1,3 +1,4 @@
+import { getTranslations } from "next-intl/server";
 import Link from "next/link";
 import { redirect } from "next/navigation";
 import { ContentCard, EmptyState, OnlineBadge } from "@/components/public/ui";
@@ -11,6 +12,7 @@ export const dynamic = "force-dynamic";
 export const metadata = { title: "Friends" };
 
 export default async function FriendsPage() {
+  const t = await getTranslations("pages.friends");
   const session = await auth();
   if (!session?.user?.id) redirect("/login");
 
@@ -56,18 +58,18 @@ export default async function FriendsPage() {
     <main style={{ display: "grid", gap: "1.5rem" }}>
       <ContentCard
         icon="🤝"
-        title="Friends"
+        title={t("title")}
         subtitle={
           friends.length === 0
-            ? "You have no friends added yet"
-            : `You have ${friends.length} friend${friends.length === 1 ? "" : "s"}`
+            ? t("emptySubtitle")
+            : t("subtitle", { count: friends.length })
         }
       />
 
       <ContentCard padded={friends.length === 0}>
         {friends.length === 0 ? (
           <EmptyState icon="🤝">
-            Add friends in the hotel and they will show up here.
+            {t("emptyState")}
           </EmptyState>
         ) : (
           <div className="card-grid sm-2 lg-3" style={{ padding: "1rem" }}>
@@ -104,7 +106,7 @@ export default async function FriendsPage() {
                         whiteSpace: "nowrap",
                       }}
                     >
-                      {friend.motto || "No motto"}
+                      {friend.motto || t("noMotto")}
                     </p>
                     <OnlineBadge online={isOnline} />
                   </div>