Expose partial item search failures and allow query-scoped retries

tests/shared-items.test.mjs

@@ -23,3 +23,16 @@ test('shared inventory waits are bounded and can be cancelled on tender change',
   await assert.rejects(pending,{name:'AbortError'});
  } finally {globalThis.fetch=original;}
 });
+test('item search does not convert unavailable inventory into zero matches',async()=>{
+ const {kalemAra}=await import('../src/services/kalem.js');
+ const original=globalThis.fetch;
+ try {
+  globalThis.fetch=async()=>Response.json({success:true,sonuclar:[]});
+  assert.deepEqual(await kalemAra('tüp'),[]);
+  globalThis.fetch=async()=>Response.json({success:false,error:'storage offline'},{status:503});
+  await assert.rejects(kalemAra('tüp'),/arama tamamlanamadı/);
+  const c=new AbortController();c.abort();
+  globalThis.fetch=async(url,{signal})=>{signal.throwIfAborted();};
+  await assert.rejects(kalemAra('tüp',{signal:c.signal}),{name:'AbortError'});
+ } finally {globalThis.fetch=original;}
+});