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/(app)/create/templates/page.tsx

@@ -1,13 +1,19 @@
 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 { CREATE_ROUTES } from "../utils/createFlowPaths";
 import { CreateFlowTemplatesPageClient } from "./CreateFlowTemplatesPageClient";
 
 export const metadata: Metadata = routeMetadata(CREATE_ROUTES.templatesPicker, {
   title: messages.metadata.templates.title,
+  openGraph: {
+    images: templatesShareImages(),
+  },
 });
 
 /** In-flow template catalog after review “Create from template”. */