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/badges/page.tsx

@@ -1,3 +1,4 @@
+import { ContentCard, EmptyState } from "@/components/public/ui";
 import { prisma } from "@/lib/prisma";
 
 export const dynamic = "force-dynamic";
@@ -13,44 +14,45 @@ export default async function BadgesPage() {
     .catch(() => []);
 
   return (
-    <main>
-      <div className="hero">
-        <h1 style={{ margin: "0 0 0.35rem" }}>Badges</h1>
-        <p className="muted" style={{ margin: 0 }}>
-          The badges you can earn and show off around the hotel.
-        </p>
-      </div>
+    <main style={{ display: "grid", gap: "1.5rem" }}>
+      <ContentCard
+        icon="🏅"
+        title="Badges"
+        subtitle="The badges you can earn and show off around the hotel"
+      />
 
-      {badges.length === 0 ? (
-        <p className="muted">No badges available yet.</p>
-      ) : (
-        <div className="grid cols-3">
-          {badges.map((badge) => (
-            <div
-              key={String(badge.id)}
-              className="card hover"
-              style={{ display: "flex", gap: "0.9rem", alignItems: "flex-start" }}
-            >
-              {/* eslint-disable-next-line @next/next/no-img-element */}
-              <img
-                src={`${BADGE_IMG_BASE}/${badge.badgeKey}.gif`}
-                alt={badge.badgeName}
-                title={badge.badgeKey}
-                width={40}
-                height={40}
-                style={{ flexShrink: 0 }}
-              />
-              <div style={{ minWidth: 0 }}>
-                <h3 style={{ margin: "0 0 0.25rem" }}>{badge.badgeName}</h3>
-                <p className="muted" style={{ margin: "0 0 0.35rem", fontFamily: "monospace" }}>
-                  {badge.badgeKey}
-                </p>
-                <p style={{ margin: 0, fontSize: "0.9rem" }}>{badge.badgeDescription}</p>
+      <ContentCard padded={badges.length === 0}>
+        {badges.length === 0 ? (
+          <EmptyState icon="🏅">No badges available yet.</EmptyState>
+        ) : (
+          <div className="card-grid sm-2 lg-3" style={{ padding: "1rem" }}>
+            {badges.map((badge) => (
+              <div
+                key={String(badge.id)}
+                className="card hover"
+                style={{ display: "flex", gap: "0.9rem", alignItems: "flex-start" }}
+              >
+                {/* eslint-disable-next-line @next/next/no-img-element */}
+                <img
+                  src={`${BADGE_IMG_BASE}/${badge.badgeKey}.gif`}
+                  alt={badge.badgeName}
+                  title={badge.badgeKey}
+                  width={40}
+                  height={40}
+                  style={{ flexShrink: 0 }}
+                />
+                <div style={{ minWidth: 0 }}>
+                  <h3 style={{ margin: "0 0 0.25rem", fontSize: "1rem" }}>{badge.badgeName}</h3>
+                  <p className="muted" style={{ margin: "0 0 0.35rem", fontFamily: "monospace" }}>
+                    {badge.badgeKey}
+                  </p>
+                  <p style={{ margin: 0, fontSize: "0.9rem" }}>{badge.badgeDescription}</p>
+                </div>
               </div>
-            </div>
-          ))}
-        </div>
-      )}
+            ))}
+          </div>
+        )}
+      </ContentCard>
     </main>
   );
 }