fix most web_fetches from getting blocked using a real user agent

server/src/search/searxng.ts

@@ -1,3 +1,4 @@
+import { buildBrowserLikeRequestHeaders } from "../browser-fetch-headers.js";
 import { env } from "../env.js";
 
 const SEARXNG_TIMEOUT_MS = 12_000;
@@ -106,10 +107,7 @@ async function fetchSearxng(url: URL, accept: string) {
     return await fetch(url, {
       redirect: "follow",
       signal: controller.signal,
-      headers: {
-        "User-Agent": "SybilBot/1.0 (+https://sybil.local)",
-        Accept: accept,
-      },
+      headers: buildBrowserLikeRequestHeaders(accept),
     });
   } finally {
     clearTimeout(timeout);