fix: block ready bid exports once a winner is published

tests/preparation-deadline.test.mjs

@@ -14,3 +14,10 @@ test('cancelled and completed tenders do not regain readiness merely through a f
  for(const durum of ['İptal Edildi','Sonuçlandı','Sözleşme imzalandı'])
   assert.match(preparationDeadlineProblem({...tender,durum},new Date('2026-09-01')),/iptal edilmiş veya sonuçlanmış/);
 });
+
+test('published winner blocks readiness even when the source status and date still appear open',()=>{
+ const now=new Date('2026-09-01');
+ for(const durum of ['Açık','',undefined])
+  assert.match(preparationDeadlineProblem({...tender,durum,kazananFirma:'QA Laboratuvar'},now),/kazananı açıklanmış/);
+ assert.equal(preparationDeadlineProblem({...tender,kazananFirma:''},now),null);
+});

tests/tender-source-changes.test.mjs

@@ -18,3 +18,15 @@ test('unknown legacy fields do not invent a change and a new saved baseline clea
  const result=applyTenderStates([current],{'2026/2':{snapshot:tenderSnapshot(current),data:{takipte:true}}});
  assert.deepEqual(result[0].sourceChanges,[]);
 });
+
+test('winner publication changes the reviewed bid source without destroying saved prices',()=>{
+ const original={ikn:'2026/winner',tarih:'10.09.2026',saat:'10:00',durum:'Açık'};
+ const draft={pricesBySource:{kit:'100'},reviewedSource:bidSourceSnapshot(original)};
+ const awarded={...original,kazananFirma:'QA Kazanan'};
+ const result=applyTenderStates([awarded],{[original.ikn]:{snapshot:tenderSnapshot(original),data:{bidDraft:draft,takipte:true}}})[0];
+ assert.notEqual(bidSourceSnapshot(result),draft.reviewedSource);
+ assert.deepEqual(result.bidDraft,draft);
+ const restored=applyTenderStates([],{[original.ikn]:{snapshot:tenderSnapshot(awarded),data:{bidDraft:draft,takipte:true}}})[0];
+ assert.equal(restored.kazananFirma,'QA Kazanan');
+ assert.equal(bidSourceSnapshot(original),bidSourceSnapshot({...original,kazananFirma:''}));
+});