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/guilds/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 { excerpt } from "@/lib/format";
@@ -28,19 +29,20 @@ async function getGuilds(): Promise<GuildCard[]> {
 }
 
 export default async function GuildsPage() {
+  const t = await getTranslations("pages.guilds");
   const guilds = await getGuilds();
 
   return (
     <main style={{ display: "grid", gap: "1.5rem" }}>
       <ContentCard
         icon="🚪"
-        title="Guilds"
-        subtitle="Browse the groups players have created and joined"
+        title={t("title")}
+        subtitle={t("subtitle")}
       />
 
       <ContentCard padded={guilds.length === 0}>
         {guilds.length === 0 ? (
-          <EmptyState icon="🚪">No guilds yet.</EmptyState>
+          <EmptyState icon="🚪">{t("empty")}</EmptyState>
         ) : (
           <div className="card-grid sm-2 lg-3" style={{ padding: "1rem" }}>
             {guilds.map((g) => (
@@ -68,10 +70,10 @@ export default async function GuildsPage() {
                 ) : null}
                 <div style={{ minWidth: 0 }}>
                   <h3 style={{ margin: "0 0 0.25rem", fontSize: "1rem" }}>
-                    {g.name || "Unnamed guild"}
+                    {g.name || t("unnamedGuild")}
                   </h3>
                   <p className="muted" style={{ margin: 0 }}>
-                    {g.description ? excerpt(g.description, 120) : "No description"}
+                    {g.description ? excerpt(g.description, 120) : t("noDescription")}
                   </p>
                 </div>
               </Link>