Adapt + improve all public pages to the atom design system

Extended the same design-system treatment to the public site, faithful
to AtomCMS's "atom" theme. New src/components/public/ui.tsx provides the
signature atom building blocks + a scoped CSS layer:
- ContentCard: surface card with a primary-tinted header (icon circle +
  title + subtitle) and padded body — the atom content-card, used as
  every page's header and section wrapper.
- StatBlock / stat-grid, EmptyState, OnlineBadge (online/offline pill),
  RankBadge (medals for the top 3), and responsive .card-grid helpers.

Swept ~45 public pages (home/community/rankings hand-built as the
reference; the rest via parallel agents that read the schema and
preserved every query, server action, auth gate and field name):
heroes → ContentCard headers, lists → card-grids in ContentCards,
"no X" → EmptyState, status → OnlineBadge/RankBadge. The leaderboard
gained Credits/Diamonds/Duckets tabs (usersCurrency).

Behaviour unchanged. Verified on the prod server against amx_test: 15+
public pages render the content-cards/grids with real data, no errors;
computed styles confirm the tinted header, icon circle, medal + online
pills. Fixed an undefined --color-golden ref. tsc 0, vitest 49/49,
next build 0.

src/app/news/page.tsx

@@ -1,4 +1,5 @@
 import Link from "next/link";
+import { ContentCard, EmptyState } from "@/components/public/ui";
 import { excerpt } from "@/lib/format";
 import { prisma } from "@/lib/prisma";
 
@@ -21,25 +22,36 @@ export default async function NewsPage() {
   }
 
   return (
-    <main>
-      <h1>News</h1>
-      {articles.length === 0 ? (
-        <p className="muted">No articles yet.</p>
-      ) : (
-        <div className="grid">
-          {articles.map((a) => (
-            <article key={a.slug} className="card">
-              <h3 style={{ margin: "0 0 0.25rem" }}>
-                <Link href={`/news/${a.slug}`}>{a.title}</Link>
-              </h3>
-              <p className="muted" style={{ marginTop: 0 }}>
-                {formatDate(a.createdAt)}
-              </p>
-              <p style={{ margin: 0 }}>{excerpt(a.shortStory, 200)}</p>
-            </article>
-          ))}
-        </div>
-      )}
+    <main style={{ display: "grid", gap: "1.5rem" }}>
+      <ContentCard
+        icon="📰"
+        title="News"
+        subtitle="The latest announcements, events and updates from the hotel"
+      />
+
+      <ContentCard padded={articles.length === 0}>
+        {articles.length === 0 ? (
+          <EmptyState icon="📰">No articles yet.</EmptyState>
+        ) : (
+          <div className="card-grid sm-2 lg-3" style={{ padding: "1rem" }}>
+            {articles.map((a) => (
+              <article
+                key={a.slug}
+                className="card hover"
+                style={{ display: "flex", flexDirection: "column" }}
+              >
+                <h3 style={{ margin: "0 0 0.25rem", fontSize: "1rem" }}>
+                  <Link href={`/news/${a.slug}`}>{a.title}</Link>
+                </h3>
+                <p className="muted" style={{ margin: "0 0 0.5rem", fontSize: "0.85rem" }}>
+                  {formatDate(a.createdAt)}
+                </p>
+                <p style={{ margin: 0 }}>{excerpt(a.shortStory, 200)}</p>
+              </article>
+            ))}
+          </div>
+        )}
+      </ContentCard>
     </main>
   );
 }