fix: separate item price analysis by unit

src/services/analytics.js

@@ -83,6 +83,8 @@ export function firmStats(tenders) {
   };
 }
 
+import { quantityParts } from './bidValidation.js';
+
 // --- Kalem bazlı fiyat analizi ---
 export function itemStats(tenders) {
   const map = new Map();
@@ -92,8 +94,12 @@ export function itemStats(tenders) {
       const bf = parseTL(it.birimFiyat);
       if (bf == null) continue;
       itemCount++;
-      const key = (it.ad || 'Diğer').trim().toLocaleUpperCase('tr-TR');
-      const cur = map.get(key) || { ad: it.ad, birim: it.birim, count: 0, prices: [] };
+      const quantity=quantityParts(it.miktar ?? it.quantity);
+      const rawUnit=quantity.birim || it.birim || '';
+      if (quantity.miktar == null || !String(rawUnit).trim()) { itemCount--; continue; }
+      const unit=String(rawUnit).trim().toLocaleLowerCase('tr-TR');
+      const key = `${(it.ad || 'Diğer').trim().toLocaleUpperCase('tr-TR')}||${unit}`;
+      const cur = map.get(key) || { ad: it.ad, birim: unit, count: 0, prices: [] };
       cur.count++;
       cur.prices.push(bf);
       map.set(key, cur);