Bind offer assistant requests and private context to their session

src/services/offerAssistant.js

@@ -0,0 +1,25 @@
+/** Bind the entire multi-step request to its starting account and mounted view. */
+export async function requestOfferAssistant({url, body, readToken, isCurrent = () => true, listDocuments, fetcher = fetch}) {
+  const token = readToken();
+  const check = () => {
+    if (!token || readToken() !== token || !isCurrent())
+      throw new Error('Oturum veya ihale değişti. İşlemi güncel ekrandan yeniden başlatın.');
+  };
+  check();
+  let payload = body;
+  if (listDocuments) {
+    const result = await listDocuments();
+    check();
+    // An unavailable inventory must not be represented as an empty inventory.
+    if (!Array.isArray(result.belgeler)) throw new Error('Belge listesi doğrulanamadı. Yeniden deneyin.');
+    payload = {...body, belgeler: result.belgeler
+      .filter(b => b.tur === 'firma' || b.ikn === body.ikn)
+      .map(b => ({ad:b.ad, kategori:b.kategori}))};
+  }
+  check();
+  const response = await fetcher(url, {method:'POST', headers:{'Content-Type':'application/json', Authorization:`Bearer ${token}`}, body:JSON.stringify(payload)});
+  const data = await response.json().catch(() => ({}));
+  check();
+  if (!response.ok || data.success === false) throw new Error(data.error || `HTTP ${response.status}`);
+  return data;
+}