fix: [dashboard] PurchaseStatusSection Tooltip formatter 타입 오류 수정

src/components/business/CEODashboard/sections/PurchaseStatusSection.tsx

@@ -132,7 +132,7 @@ export function PurchaseStatusSection({ data }: PurchaseStatusSectionProps) {
                 <XAxis dataKey="month" tick={{ fontSize: 12 }} />
                 <YAxis tickFormatter={formatAmount} tick={{ fontSize: 11 }} />
                 <Tooltip
-                  formatter={(value: number | undefined) => [formatKoreanAmount(value ?? 0), '매입']}
+                  formatter={(value) => [formatKoreanAmount(Number(value) || 0), '매입']}
                 />
                 <Bar dataKey="amount" fill="#f59e0b" radius={[4, 4, 0, 0]} />
               </BarChart>