feat: shop buy, forum replies, tickets, messages, sessions, and UX hardening

Complete remaining product gaps: credit-based shop purchases, guild thread replies, help ticket detail/reply/close, offline message compose, sign-out-everywhere via JWT version, ads delete confirm, soft-fail feedback, rate limits, loading states, and single auth() in site layout.

Co-authored-by: Cursor <[email protected]>

src/components/top-header.tsx

@@ -1,6 +1,7 @@
 import Image from "next/image";
 import Link from "next/link";
-import { auth, signOut } from "@/lib/auth";
+import type { Session } from "next-auth";
+import { signOut } from "@/lib/auth";
 import { avatarImageUrl } from "@/lib/format";
 import { prisma } from "@/lib/prisma";
 import { siteSettings } from "@/lib/services/site-settings";
@@ -37,8 +38,7 @@ function Currency({
 	);
 }
 
-export async function TopHeader() {
-	const session = await auth();
+export async function TopHeader({ session }: { session: Session | null }) {
 	if (!session?.user?.id) return null;
 	const id = Number(session.user.id);