Fix ZXDB pagination counters and navigation

Implement URL-driven pagination and correct total counts across ZXDB:
- Root /zxdb: SSR reads ?page; client syncs to SSR; Prev/Next as Links.
- Sub-index pages (genres, languages, machinetypes): parse ?page on server; use SSR props in clients; Prev/Next via Links.
- Labels browse (/zxdb/labels): dynamic SSR, reads ?q & ?page; typed count(*); client syncs to SSR; Prev/Next preserve q.
- Label detail (/zxdb/labels/[id]): tab-aware Prev/Next Links; counters from server.
- Repo: replace raw counts with typed Drizzle count(*) for reliable totals.

Signed-off-by: Junie <Junie@lucy.xalior.com>

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

@@ -3,10 +3,12 @@ import { entriesByLanguage } from "@/server/repo/zxdb";
 
 export const metadata = { title: "ZXDB Language" };
 
-export const revalidate = 3600;
+// Depends on searchParams (?page=). Force dynamic so each page renders correctly.
+export const dynamic = "force-dynamic";
 
-export default async function Page({ params }: { params: Promise<{ id: string }> }) {
-  const { id } = await params;
-  const initial = await entriesByLanguage(id, 1, 20);
+export default async function Page({ params, searchParams }: { params: Promise<{ id: string }>; searchParams: Promise<{ [key: string]: string | string[] | undefined }> }) {
+  const [{ id }, sp] = await Promise.all([params, searchParams]);
+  const page = Math.max(1, Number(Array.isArray(sp.page) ? sp.page[0] : sp.page) || 1);
+  const initial = await entriesByLanguage(id, page, 20);
   return <LanguageDetailClient id={id} initial={initial as any} />;
 }