Resolve share URLs from the instance host and ship 1200×630 Open Graph images.

Staging no longer advertises production canonicals, and Slack/social previews get a default hero card with template and article overrides.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/(marketing)/templates/page.tsx

@@ -1,12 +1,18 @@
 import type { Metadata } from "next";
 import messages from "../../../messages/en/index";
 import { listRuleTemplatesFromDb } from "../../../lib/server/ruleTemplates";
-import { routeMetadata } from "../../../lib/siteMetadata";
+import {
+  routeMetadata,
+  templatesShareImages,
+} from "../../../lib/siteMetadata";
 import { gridEntriesForFullCatalogWithFallback } from "../../../lib/templates/templateGridPresentation";
 import TemplatesPageClient from "./TemplatesPageClient";
 
 export const metadata: Metadata = routeMetadata("/templates", {
   title: messages.metadata.templates.title,
+  openGraph: {
+    images: templatesShareImages(),
+  },
 });
 
 export default async function TemplatesPage() {