chore(dashboard): move chain SEO fetch to seo-pages.thirdweb.xyz

apps/dashboard/src/app/(app)/(dashboard)/(chain)/[chain_id]/(chainPage)/apis/chain-seo.ts

@@ -28,23 +28,43 @@ type ChainSeo = {
   };
 };
 
-export const fetchChainSeo = unstable_cache(
-  async (chainId: number) => {
-    const url = new URL(
-      `https://seo-pages-generator-5814.zeet-nftlabs.zeet.app/chain/${chainId}`,
-    );
-    const res = await fetch(url, {
-      headers: {
-        "Content-Type": "application/json",
-      },
-    });
-
-    if (!res.ok) {
-      return undefined;
-    }
-
-    return res.json() as Promise<ChainSeo>;
-  },
+async function fetchChainSeoUncached(
+  chainId: number,
+): Promise<ChainSeo | undefined> {
+  const url = new URL(`https://seo-pages.thirdweb.xyz/chain/${chainId}`);
+
+  const res = await fetch(url, {
+    headers: { "Content-Type": "application/json" },
+  });
+
+  // 4xx means this chain simply has no SEO entry -- a stable answer worth caching.
+  if (res.status >= 400 && res.status < 500) {
+    return undefined;
+  }
+
+  // 5xx (or any other non-OK) is transient. Throw so unstable_cache does not
+  // persist the failure and starve the page of SEO for a full day.
+  if (!res.ok) {
+    throw new Error(`chain SEO fetch failed: ${res.status}`);
+  }
+
+  return (await res.json()) as ChainSeo;
+}
+
+const fetchChainSeoCached = unstable_cache(
+  fetchChainSeoUncached,
   ["chain-seo"],
   { revalidate: 60 * 60 * 24 }, // 24 hours
 );
+
+export async function fetchChainSeo(
+  chainId: number,
+): Promise<ChainSeo | undefined> {
+  // SEO copy is decorative: a failure must never take the page down. A transient
+  // error propagates out of the cache uncached, and we degrade to undefined here.
+  try {
+    return await fetchChainSeoCached(chainId);
+  } catch {
+    return undefined;
+  }
+}