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/navigation.tsx

@@ -1,15 +1,14 @@
 import Image from "next/image";
 import Link from "next/link";
 import { getTranslations } from "next-intl/server";
+import type { Session } from "next-auth";
 import { LanguageSwitcher } from "@/components/language-switcher";
 import { MobileNav } from "@/components/mobile-nav";
 import { NavDropdown } from "@/components/nav-dropdown";
 import { NavbarColorPicker } from "@/components/navbar-color-picker";
 import { ThemeSwitcher } from "@/components/theme-switcher";
-import { auth } from "@/lib/auth";
 
-export async function Navigation() {
-	const session = await auth();
+export async function Navigation({ session }: { session: Session | null }) {
 	const t = await getTranslations("nav");
 	const isStaff = (session?.user?.rank ?? 0) >= 7;