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/photos/page.tsx

@@ -1,3 +1,4 @@
+import { getTranslations } from "next-intl/server";
 import { ContentCard, EmptyState } from "@/components/public/ui";
 import { prisma } from "@/lib/prisma";
 
@@ -21,6 +22,8 @@ function formatDate(timestamp: number): string {
 }
 
 export default async function PhotosPage() {
+  const t = await getTranslations("pages.photos");
+
   let photos: Photo[] = [];
   try {
     photos = await prisma.cameraWeb.findMany({
@@ -35,13 +38,13 @@ export default async function PhotosPage() {
     <main style={{ display: "grid", gap: "1.5rem" }}>
       <ContentCard
         icon="📸"
-        title="Photos"
-        subtitle="The latest snapshots taken in the hotel"
+        title={t("title")}
+        subtitle={t("subtitle")}
       />
 
       <ContentCard padded={photos.length === 0}>
         {photos.length === 0 ? (
-          <EmptyState icon="📸">No photos yet.</EmptyState>
+          <EmptyState icon="📸">{t("noPhotos")}</EmptyState>
         ) : (
           <div className="card-grid sm-2 md-3 lg-4" style={{ padding: "1rem" }}>
             {photos.map((p) => (
@@ -49,7 +52,7 @@ export default async function PhotosPage() {
                 {/* eslint-disable-next-line @next/next/no-img-element */}
                 <img
                   src={p.url}
-                  alt={`Photo by user #${p.userId}`}
+                  alt={t("photoAlt", { id: p.userId })}
                   style={{
                     width: "100%",
                     height: "auto",
@@ -61,7 +64,7 @@ export default async function PhotosPage() {
                     {formatDate(p.timestamp)}
                   </p>
                   <p className="muted" style={{ margin: 0, fontSize: "0.85rem" }}>
-                    by user #{p.userId}
+                    {t("byUser", { id: p.userId })}
                   </p>
                 </div>
               </article>