More fixes

frontend/src/lib/api.ts

@@ -59,6 +59,12 @@ export async function fetchWithRetry<T>(
   }
 }
 
+/** Fire-and-forget request to pre-warm the screenshot cache for OG images. */
+export function prewarmScreenshot(params: string): void {
+  fetch(apiUrl('screenshot', new URLSearchParams(`og=1&${params}`)), authHeaders())
+    .catch(() => {}); // best-effort, don't care if it fails
+}
+
 export async function shortenUrl(params: string): Promise<string> {
   const res = await fetch(apiUrl('shorten'), {
     method: 'POST',