extract exchange amount validation

src/components/TenderDetailModal.jsx

@@ -13,6 +13,7 @@ import {
 import { acknowledgeNoteDraft, editNoteDraft } from '../services/noteDrafts';
 import { tenderStateKey } from '../services/tenderState';
 import { createTenderICS } from '../services/tenderCalendar';
+import { validateExchangeAmount, MAX_EXCHANGE_AMOUNT } from '../services/exchangeAmount';
 
 export const TenderDetailModal = () => {
   const { activeTenderDetail, setActiveTenderDetail, toggleTrackTender, userProfile, setIsAiSpecAnalyzerOpen, gorevAc, gorevKontrol, aiAnalysisResults, tenders, mutateTender, savingCount, saveError, authUser, detailLoad, retryTenderDetail } = useApp();
@@ -49,7 +50,7 @@ export const TenderDetailModal = () => {
   const usdRate = fx?.rates?.USD;
   const eurRate = fx?.rates?.EUR;
   const fxIsStale = Boolean(fx?.refreshError);
-  const bidAmountValid = Number.isFinite(bidAmount) && bidAmount >= 0 && bidAmount <= 1e12;
+  const bidAmountValid = validateExchangeAmount(bidAmount);
 
   if (!activeTenderDetail) return null;
   // Havuzdaki güncel kayıt: takip/görev değişince düğme etiketleri de değişsin.
@@ -385,7 +386,7 @@ export const TenderDetailModal = () => {
                       onChange={(e) => {
                         const value = Number(e.target.value);
                         setBidAmount(value);
-                        setBidAmountError(Number.isFinite(value) && value >= 0 && value <= 1e12 ? null : 'Tutar 0 ile 1.000.000.000.000 TL arasında olmalıdır.');
+                        setBidAmountError(validateExchangeAmount(value) ? null : `Tutar 0 ile ${MAX_EXCHANGE_AMOUNT.toLocaleString('tr-TR')} TL arasında olmalıdır.`);
                       }}
                       className="w-full bg-white/10 border border-white/20 rounded-lg px-3 py-1.5 text-xs text-white"
                     />

src/services/exchangeAmount.js

@@ -0,0 +1,9 @@
+const MAX_EXCHANGE_AMOUNT = 1e12;
+
+export function validateExchangeAmount(value) {
+  if (value === null || value === undefined || (typeof value === 'string' && !value.trim())) return false;
+  const amount = Number(value);
+  return Number.isFinite(amount) && amount >= 0 && amount <= MAX_EXCHANGE_AMOUNT;
+}
+
+export { MAX_EXCHANGE_AMOUNT };