Open and retain tender details discovered outside the main pool

tests/tender-detail-fetch.test.mjs

@@ -20,3 +20,17 @@ test('detail loading rejects empty source, supports retry and stops on timeout/c
     await assert.rejects(()=>pending,{name:'AbortError'});
   } finally { globalThis.fetch=original; }
 });
+
+test('search-only detail uses IKN endpoint and warns when official announcement is absent',async()=>{
+ const original=globalThis.fetch;
+ try {
+  globalThis.fetch=async url=>{
+   assert.equal(url,'/api/documents/ilan?ikn=2026%2F123');
+   return Response.json({success:true,ikn:'2026/123',metin:'Temel ihale bilgisi',ilanSayisi:0});
+  };
+  const detail=await fetchTenderDetail('ekap-2026/123');
+  assert.equal(detail.aciklama,'Temel ihale bilgisi');assert.match(detail.sourceWarning,/yalnız temel/);
+  globalThis.fetch=async()=>Response.json({success:true,ikn:'2026/999',metin:'Farklı kaynak'});
+  await assert.rejects(fetchTenderDetail('ekap-2026/123'),/İKN/);
+ } finally {globalThis.fetch=original;}
+});