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/labels/LabelsSearch.tsx

@@ -3,6 +3,7 @@
 import { useEffect, useMemo, useState } from "react";
 import Link from "next/link";
 import { useRouter } from "next/navigation";
+import ZxdbBreadcrumbs from "@/app/zxdb/components/ZxdbBreadcrumbs";
 
 type Label = { id: number; name: string; labeltypeId: string | null };
 type Paged<T> = { items: T[]; page: number; pageSize: number; total: number };
@@ -33,6 +34,13 @@ export default function LabelsSearch({ initial, initialQ }: { initial?: Paged<La
 
   return (
     <div>
+      <ZxdbBreadcrumbs
+        items={[
+          { label: "ZXDB", href: "/zxdb" },
+          { label: "Labels" },
+        ]}
+      />
+
       <h1>Labels</h1>
       <form className="row gy-2 gx-2 align-items-center" onSubmit={submit}>
         <div className="col-sm-8 col-md-6 col-lg-4">