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/guilds/[id]/page.tsx

@@ -1,5 +1,6 @@
 import Link from "next/link";
 import { notFound } from "next/navigation";
+import { ContentCard, EmptyState, StatBlock } from "@/components/public/ui";
 import { avatarImageUrl } from "@/lib/format";
 import { prisma } from "@/lib/prisma";
 import { siteSettings } from "@/lib/services/site-settings";
@@ -118,74 +119,96 @@ export default async function GuildPage({
   const created = formatTimestamp(guild.dateCreated);
 
   return (
-    <main>
-      <p style={{ marginTop: 0 }}>
+    <main style={{ display: "grid", gap: "1.5rem" }}>
+      <p style={{ margin: 0 }}>
         <Link href="/guilds">← All guilds</Link>
       </p>
 
-      <div
-        className="card"
-        style={{ display: "flex", gap: "1.25rem", alignItems: "flex-start" }}
-      >
-        {guild.badge ? (
-          // eslint-disable-next-line @next/next/no-img-element
-          <img
-            src={`https://habbo-stories-content.s3.amazonaws.com/badge-part-images/${guild.badge}.gif`}
-            alt={`${guild.name} badge`}
-            width={48}
-            height={48}
-            style={{ flex: "0 0 auto" }}
-          />
-        ) : null}
-        <div style={{ minWidth: 0 }}>
-          <h1 style={{ margin: "0 0 0.25rem" }}>{guild.name || "Unnamed guild"}</h1>
-          <p style={{ margin: "0 0 0.5rem" }}>
-            {guild.description || <span className="muted">No description</span>}
-          </p>
-          <p className="muted" style={{ margin: 0 }}>
-            {members.length} {members.length === 1 ? "member" : "members"}
-            {created ? ` · Founded ${created}` : ""}
-          </p>
+      <ContentCard>
+        <div style={{ display: "flex", gap: "1.25rem", alignItems: "flex-start" }}>
+          {guild.badge ? (
+            // eslint-disable-next-line @next/next/no-img-element
+            <img
+              src={`https://habbo-stories-content.s3.amazonaws.com/badge-part-images/${guild.badge}.gif`}
+              alt={`${guild.name} badge`}
+              width={48}
+              height={48}
+              style={{ flex: "0 0 auto" }}
+            />
+          ) : null}
+          <div style={{ minWidth: 0, flex: 1 }}>
+            <h1 style={{ margin: "0 0 0.35rem" }}>{guild.name || "Unnamed guild"}</h1>
+            <p style={{ margin: 0 }}>
+              {guild.description || <span className="muted">No description</span>}
+            </p>
+          </div>
         </div>
-      </div>
 
-      <h2 style={{ marginTop: "1.5rem" }}>Members</h2>
-      {members.length === 0 ? (
-        <p className="muted">No members.</p>
-      ) : (
-        <div className="grid cols-3">
-          {members.map((m) => (
-            <div
-              key={m.userId}
-              className="card"
-              style={{ display: "flex", gap: "0.85rem", alignItems: "center" }}
-            >
-              {/* eslint-disable-next-line @next/next/no-img-element */}
-              <img
-                className="avatar"
-                src={avatarImageUrl(imagerBase ?? "", m.look, { size: "l" })}
-                alt={`${m.username} avatar`}
-                width={50}
-                height={75}
-                style={{ flex: "0 0 auto" }}
-              />
-              <div style={{ minWidth: 0 }}>
-                <h3 style={{ margin: "0 0 0.15rem" }}>
-                  <Link href={`/u/${m.username}`}>{m.username}</Link>
-                </h3>
-                {m.isOwner ? (
-                  <p className="muted" style={{ margin: "0 0 0.15rem" }}>
-                    Owner
-                  </p>
-                ) : null}
-                <p className="muted" style={{ margin: 0 }}>
-                  {m.motto || "No motto"}
-                </p>
-              </div>
-            </div>
-          ))}
+        <div className="stat-grid" style={{ marginTop: "1.1rem" }}>
+          <StatBlock
+            icon="👥"
+            value={members.length}
+            label={members.length === 1 ? "Member" : "Members"}
+          />
+          {created ? <StatBlock icon="📅" value={created} label="Founded" /> : null}
+          <StatBlock
+            icon="🚪"
+            value={
+              <Link href={`/guilds/${guild.id}/forum`} style={{ textDecoration: "none" }}>
+                Forum →
+              </Link>
+            }
+            label="Discussion"
+          />
         </div>
-      )}
+      </ContentCard>
+
+      <ContentCard
+        icon="👥"
+        title="Members"
+        subtitle={`${members.length} ${members.length === 1 ? "member" : "members"}`}
+        padded={members.length === 0}
+      >
+        {members.length === 0 ? (
+          <EmptyState icon="👥">No members.</EmptyState>
+        ) : (
+          <div className="card-grid sm-2 lg-3" style={{ padding: "1rem" }}>
+            {members.map((m) => (
+              <div
+                key={m.userId}
+                className="card hover"
+                style={{ display: "flex", gap: "0.85rem", alignItems: "center" }}
+              >
+                {/* eslint-disable-next-line @next/next/no-img-element */}
+                <img
+                  className="avatar"
+                  src={avatarImageUrl(imagerBase ?? "", m.look, { size: "l" })}
+                  alt={`${m.username} avatar`}
+                  width={50}
+                  height={75}
+                  style={{ flex: "0 0 auto" }}
+                />
+                <div style={{ minWidth: 0 }}>
+                  <h3 style={{ margin: "0 0 0.2rem", fontSize: "1rem" }}>
+                    <Link href={`/u/${m.username}`}>{m.username}</Link>
+                  </h3>
+                  {m.isOwner ? (
+                    <span
+                      className="online-badge online"
+                      style={{ marginBottom: "0.25rem" }}
+                    >
+                      👑 Owner
+                    </span>
+                  ) : null}
+                  <p className="muted" style={{ margin: m.isOwner ? "0.25rem 0 0" : 0 }}>
+                    {m.motto || "No motto"}
+                  </p>
+                </div>
+              </div>
+            ))}
+          </div>
+        )}
+      </ContentCard>
     </main>
   );
 }