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/actions/admin-email-templates.ts

@@ -0,0 +1,68 @@
+"use server";
+
+import { revalidatePath } from "next/cache";
+import { requireStaff } from "@/lib/admin/guard";
+import { prisma } from "@/lib/prisma";
+
+export async function createEmailTemplate(formData: FormData): Promise<void> {
+  await requireStaff();
+  const name = String(formData.get("name") ?? "").trim().slice(0, 255);
+  const subject = String(formData.get("subject") ?? "").trim().slice(0, 255);
+  const body = String(formData.get("body") ?? "");
+  const variablesRaw = String(formData.get("variables") ?? "").trim();
+  const isActive = formData.get("isActive") != null;
+  if (!name || !subject || !body) return;
+
+  await prisma.emailTemplates.create({
+    data: {
+      name,
+      subject,
+      body,
+      variables: variablesRaw || null,
+      isActive,
+    },
+  });
+  revalidatePath("/admin/email-templates");
+}
+
+export async function updateEmailTemplate(formData: FormData): Promise<void> {
+  await requireStaff();
+  const raw = String(formData.get("id") ?? "");
+  if (!raw) return;
+  let id: bigint;
+  try {
+    id = BigInt(raw);
+  } catch {
+    return;
+  }
+  const subject = String(formData.get("subject") ?? "").trim().slice(0, 255);
+  const body = String(formData.get("body") ?? "");
+  const variablesRaw = String(formData.get("variables") ?? "").trim();
+  const isActive = formData.get("isActive") != null;
+  if (!subject || !body) return;
+
+  await prisma.emailTemplates.update({
+    where: { id },
+    data: {
+      subject,
+      body,
+      variables: variablesRaw || null,
+      isActive,
+    },
+  });
+  revalidatePath("/admin/email-templates");
+}
+
+export async function deleteEmailTemplate(formData: FormData): Promise<void> {
+  await requireStaff();
+  const raw = String(formData.get("id") ?? "");
+  if (!raw) return;
+  let id: bigint;
+  try {
+    id = BigInt(raw);
+  } catch {
+    return;
+  }
+  await prisma.emailTemplates.delete({ where: { id } });
+  revalidatePath("/admin/email-templates");
+}