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/help/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";
@@ -35,6 +36,8 @@ function isExternal(url: string): boolean {
 }
 
 export default async function HelpCenterPage() {
+  const t = await getTranslations("pages.help");
+
   let categories: HelpCategory[] = [];
   try {
     categories = await prisma.websiteHelpCenterCategories.findMany({
@@ -91,23 +94,23 @@ export default async function HelpCenterPage() {
     <main style={{ display: "grid", gap: "1.5rem" }}>
       <ContentCard
         icon="❓"
-        title="Help Center"
-        subtitle="Find guides, support topics, and the hotel rules — everything you need to get help."
+        title={t("title")}
+        subtitle={t("subtitle")}
         action={
           <Link className="btn btn-outline" href="/help/tickets">
-            My tickets →
+            {t("myTickets")}
           </Link>
         }
       />
 
       <ContentCard
         icon="🧭"
-        title="Support topics"
-        subtitle="Browse guides and answers to common questions"
+        title={t("topicsTitle")}
+        subtitle={t("topicsSubtitle")}
         padded={categories.length === 0}
       >
         {categories.length === 0 ? (
-          <EmptyState icon="🧭">No help topics yet.</EmptyState>
+          <EmptyState icon="🧭">{t("topicsEmpty")}</EmptyState>
         ) : (
           <div className="card-grid sm-2 lg-3" style={{ padding: "1rem" }}>
             {categories.map((c) => (
@@ -169,12 +172,12 @@ export default async function HelpCenterPage() {
 
       <ContentCard
         icon="📜"
-        title="Hotel rules"
-        subtitle="Please read these before hanging out in the hotel"
+        title={t("rulesTitle")}
+        subtitle={t("rulesSubtitle")}
         padded={ruleCategories.length === 0}
       >
         {ruleCategories.length === 0 ? (
-          <EmptyState icon="📜">No rules published yet.</EmptyState>
+          <EmptyState icon="📜">{t("rulesEmpty")}</EmptyState>
         ) : (
           <div style={{ display: "grid", gap: "1rem", padding: "1rem" }}>
             {ruleCategories.map((cat) => {
@@ -200,7 +203,7 @@ export default async function HelpCenterPage() {
 
                   {catRules.length === 0 ? (
                     <p className="muted" style={{ marginBottom: 0 }}>
-                      No rules in this category.
+                      {t("categoryEmpty")}
                     </p>
                   ) : (
                     <ul style={{ margin: "0.85rem 0 0", paddingLeft: "1.2rem" }}>