Keep research search recoverable and isolate browser checks [skip ci]

src/lib/paper-api.mjs

@@ -0,0 +1,17 @@
+// Anonymous server-side transport. Expected HTTP/network failures are values;
+// callers can keep the search form usable without falling back to sample data.
+export function createPaperTransport(origin, requestUpstream = fetch) {
+  return async function request(path) {
+    let response;
+    try {
+      response = await requestUpstream(new URL(path, origin.replace(/\/$/, "") + "/"), {
+        cache: "no-store", signal: AbortSignal.timeout(12000), redirect: "error",
+      });
+    } catch (error) {
+      return { ok: false, status: error?.name === "TimeoutError" || error?.name === "AbortError" ? 504 : 503 };
+    }
+    if (!response.ok) return { ok: false, status: response.status };
+    try { return { ok: true, data: await response.json() }; }
+    catch { return { ok: false, status: 502 }; }
+  };
+}