Add ZXDB breadcrumbs and release places

Add ZXDB breadcrumbs on list/detail pages and group release
magazine references by issue for clearer Places view.

Signed-off-by: codex@lucy.xalior.com

src/app/zxdb/magazines/[id]/page.tsx

@@ -1,6 +1,7 @@
 import Link from "next/link";
 import { notFound } from "next/navigation";
 import { getMagazine } from "@/server/repo/zxdb";
+import ZxdbBreadcrumbs from "@/app/zxdb/components/ZxdbBreadcrumbs";
 
 export const metadata = { title: "ZXDB Magazine" };
 export const revalidate = 3600;
@@ -15,6 +16,14 @@ export default async function Page({ params }: { params: Promise<{ id: string }>
 
   return (
     <div>
+      <ZxdbBreadcrumbs
+        items={[
+          { label: "ZXDB", href: "/zxdb" },
+          { label: "Magazines", href: "/zxdb/magazines" },
+          { label: mag.title },
+        ]}
+      />
+
       <h1 className="mb-1">{mag.title}</h1>
       <div className="text-secondary mb-3">Language: {mag.languageId}</div>