Add niche admin + public expansions + self-host Nunito font (batches 3-4)

Built via two more parallel agent workflows (read schema -> return files),
integrated + verified.

Admin: /admin/emulator (emulator_settings + emulator_texts key/value editor),
/admin/badges (give-badge via RCON), /admin/rare-values (CRUD), /admin/housekeeping
(CRUD), /admin/email-templates (CRUD), /admin/photos (moderation).
Public: /rares (+[category]), /leaderboard (credits/diamonds/duckets),
/guilds (+[id] members), /redeem (voucher -> sendCurrency).
Expanded: /u/[username] now shows badges + photos + guestbook (post form);
/news/[slug] now shows reactions + comments (comment form). Reactions tallied
in JS (Prisma groupBy typing avoided).
Self-hosted Nunito via next/font/google wired to --font-nunito (the atom theme
font, no runtime external fetch). Header + admin nav extended.

Verified: tsc exit 0, vitest 48/48, next build exit 0.

src/app/redeem/RedeemForm.tsx

@@ -0,0 +1,49 @@
+"use client";
+
+import { useActionState } from "react";
+import { redeem, type RedeemState } from "@/actions/voucher";
+
+const initialState: RedeemState = null;
+
+/**
+ * Client form for /redeem. Uses useActionState so the redeem() server action's
+ * feedback ({ ok, message }) can be rendered inline without a redirect.
+ */
+export default function RedeemForm() {
+  const [state, formAction, pending] = useActionState(redeem, initialState);
+
+  return (
+    <form
+      action={formAction}
+      style={{ display: "flex", flexDirection: "column", gap: "0.75rem" }}
+    >
+      <input
+        name="code"
+        maxLength={255}
+        placeholder="Enter your voucher code"
+        aria-label="Voucher code"
+        autoComplete="off"
+        required
+      />
+      <div>
+        <button type="submit" className="btn btn-primary" disabled={pending}>
+          {pending ? "Redeeming…" : "Redeem voucher"}
+        </button>
+      </div>
+
+      {state ? (
+        <p
+          role="status"
+          aria-live="polite"
+          style={{
+            margin: "0.25rem 0 0",
+            fontWeight: 700,
+            color: state.ok ? "var(--color-secondary-hover)" : "var(--color-danger)",
+          }}
+        >
+          {state.message}
+        </p>
+      ) : null}
+    </form>
+  );
+}