Reorganize admin nav by feature and soften light mode.

Sidebar lists one entry per feature; keep hub tabs only for sibling views (events, tickets, ranks/permissions, moderation, radio, analytics, devops). Soft cool-gray light canvas/surface replaces harsh white.

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

src/components/admin/admin-hub-chrome.tsx

@@ -30,7 +30,7 @@ export function AdminHubChrome({ children }: { children: ReactNode }) {
 			icon={hub.icon}
 			title={t(hub.titleKey)}
 			subtitle={t(hub.subtitleKey)}
-			tabs={<AdminSectionTabs tabs={tabs} />}
+			tabs={tabs.length > 1 ? <AdminSectionTabs tabs={tabs} /> : undefined}
 			className="admin-hub-panel"
 		>
 			{children}

src/components/admin/admin-nav-link.tsx

@@ -13,18 +13,26 @@ export function AdminNavLink({
 	href,
 	icon,
 	matchPrefixes,
+	matchExcludePrefixes,
 	children,
 }: {
 	href: string;
 	icon?: ReactNode;
 	matchPrefixes?: string[];
+	matchExcludePrefixes?: string[];
 	children: ReactNode;
 }) {
 	const pathname = usePathname() ?? "";
 	const { close } = useAdminMobile();
 
+	const excluded = matchExcludePrefixes?.some(
+		(p) => pathname === p || pathname.startsWith(`${p}/`),
+	);
+
 	let active: boolean;
-	if (href === "/admin") {
+	if (excluded) {
+		active = false;
+	} else if (href === "/admin") {
 		active = pathname === "/admin";
 	} else if (matchPrefixes?.length) {
 		active = matchPrefixes.some(