Extend fine-grained ACL to settings, content, shop, and radio.

Gate pages and mutations on module PERMS instead of dashboard-only staff checks, add radio view/edit slugs with migration 0015, and expand the operations contract tests.

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

src/app/admin/radio/monitoring/page.tsx

@@ -2,7 +2,6 @@ import { Radio } from "lucide-react";
 import Link from "next/link";
 import { getTranslations } from "next-intl/server";
 import { DiagnosticRow, StatusCard } from "@/components/admin/dashboard";
-import { requireStaff } from "@/lib/admin/guard";
 import { siteSettings } from "@/lib/services/site-settings";
 
 export const dynamic = "force-dynamic";
@@ -166,8 +165,6 @@ function shortUrl(url: string): string {
 }
 
 export default async function AdminRadioMonitoringPage() {
-	await requireStaff();
-
 	const t = await getTranslations("pages.admin.radio");
 
 	let nowPlayingUrl: string | null = null;