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/forgot/page.tsx

@@ -1,5 +1,6 @@
 import Link from "next/link";
 import { requestReset } from "@/actions/password-reset";
+import { ContentCard } from "@/components/public/ui";
 
 export default async function ForgotPage({
   searchParams,
@@ -9,15 +10,18 @@ export default async function ForgotPage({
   const { sent } = await searchParams;
 
   return (
-    <main style={{ maxWidth: 400, margin: "2rem auto" }}>
-      <div className="card" style={{ padding: "1.75rem" }}>
-        <h1 style={{ marginTop: 0, textAlign: "center" }}>Reset password</h1>
+    <main style={{ maxWidth: 420, margin: "2rem auto" }}>
+      <ContentCard
+        icon="🔑"
+        title="Reset password"
+        subtitle="We'll email you a secure link to set a new password."
+      >
         {sent ? (
-          <p className="muted" style={{ textAlign: "center" }}>
+          <p className="muted" style={{ textAlign: "center", margin: 0 }}>
             If that email is registered, a reset link has been sent. Check your inbox.
           </p>
         ) : (
-          <form action={requestReset} style={{ display: "grid", gap: "0.7rem", marginTop: "1rem" }}>
+          <form action={requestReset} style={{ display: "grid", gap: "0.7rem" }}>
             <input name="email" type="email" placeholder="Your email" autoComplete="email" required />
             <button type="submit" className="btn btn-primary">
               Send reset link
@@ -27,7 +31,7 @@ export default async function ForgotPage({
         <p className="muted" style={{ textAlign: "center", marginBottom: 0, marginTop: "1rem" }}>
           <Link href="/login">Back to login</Link>
         </p>
-      </div>
+      </ContentCard>
     </main>
   );
 }