fix: distinguish units in price analysis selection

src/components/tools/PriceAnalysis.jsx

@@ -12,7 +12,7 @@ export const PriceAnalysis = () => {
 
   const selected = useMemo(() => {
     if (!items.length) return null;
-    const found = items.find((i) => i.ad === selectedKey);
+    const found = items.find((i) => `${i.ad}||${i.birim}` === selectedKey);
     return found || items[0];
   }, [items, selectedKey]);
 
@@ -91,14 +91,14 @@ export const PriceAnalysis = () => {
             </h3>
             {items.slice(0, 60).map((it) => (
               <button
-                key={it.ad}
-                onClick={() => setSelectedKey(it.ad)}
+                key={`${it.ad}||${it.birim}`}
+                onClick={() => setSelectedKey(`${it.ad}||${it.birim}`)}
                 className={`w-full text-left p-2.5 rounded-lg text-xs font-semibold transition-all ${
-                  selected?.ad === it.ad ? 'bg-emerald-600 text-white' : 'bg-slate-50 hover:bg-slate-100 text-slate-700 border border-slate-200'
+                  selectedKey === `${it.ad}||${it.birim}` ? 'bg-emerald-600 text-white' : 'bg-slate-50 hover:bg-slate-100 text-slate-700 border border-slate-200'
                 }`}
               >
                 <div className="truncate">📦 {it.ad}</div>
-                <div className={`text-[10px] ${selected?.ad === it.ad ? 'text-emerald-100' : 'text-slate-400'}`}>{it.count} kayıt · medyan {formatTL(it.median)}</div>
+                <div className={`text-[10px] ${selectedKey === `${it.ad}||${it.birim}` ? 'text-emerald-100' : 'text-slate-400'}`}>{it.count} kayıt · {it.birim} medyan {formatTL(it.median)}</div>
               </button>
             ))}
           </div>