feat(agents, config, dashboard, i18n): add agent line provision wizard, site deletion, and site dashboard with multi-language support

Added agent line provision wizard page with permission gating, replacing redirect placeholder. Introduced site deletion API and UI with confirmation dialog in integration sites management. Added new site-scoped dashboard panel showing bet metrics, P/L trends, active players, and quick links. Enhanced chart tooltip to support custom formatters and fix indicator color

src/components/admin/admin-no-integration-site-state.tsx

@@ -0,0 +1,26 @@
+"use client";
+
+import Link from "next/link";
+import type { ReactElement } from "react";
+import { useTranslation } from "react-i18next";
+
+import { AdminNoResourceState } from "@/components/admin/admin-no-resource-state";
+import { Button } from "@/components/ui/button";
+
+export function AdminNoIntegrationSiteState({
+  canCreate = false,
+}: {
+  canCreate?: boolean;
+}): ReactElement {
+  const { t } = useTranslation("common");
+
+  return (
+    <AdminNoResourceState message={t("integrationSites.emptyPlatformHint")}>
+      {canCreate ? (
+        <Button nativeButton={false} size="sm" render={<Link href="/admin/config/integration-sites" />}>
+          {t("integrationSites.createSite")}
+        </Button>
+      ) : null}
+    </AdminNoResourceState>
+  );
+}