fix: reset stale price analysis selection

src/components/tools/PriceAnalysis.jsx

@@ -1,4 +1,4 @@
-import React, { useState, useMemo } from 'react';
+import React, { useState, useMemo, useEffect } from 'react';
 import { ResponsiveContainer, BarChart, Bar, XAxis, YAxis, Tooltip, CartesianGrid, Cell } from 'recharts';
 import { TrendingUp, Download, Sparkles, Inbox } from 'lucide-react';
 import { useApp } from '../../context/AppContext';
@@ -10,6 +10,10 @@ export const PriceAnalysis = () => {
   const { items, itemCount, uniqueItems } = useMemo(() => itemStats(tenders), [tenders]);
   const [selectedKey, setSelectedKey] = useState(null);
 
+  useEffect(() => {
+    if (selectedKey && !items.some((item) => `${item.ad}||${item.birim}` === selectedKey)) setSelectedKey(null);
+  }, [items, selectedKey]);
+
   const selected = useMemo(() => {
     if (!items.length) return null;
     const found = items.find((i) => `${i.ad}||${i.birim}` === selectedKey);