修复：补充提交课程与图书选择商品公共组件价格处理

utils/index.ts

@@ -56,4 +56,22 @@ export const copyToClipboard = (content: string, title: string = '') => {
       console.error('复制失败:', error)
     }
   })
+}
+
+/**
+ * 计算最低价格
+ */
+export const calculateLowestPrice = (priceData: object): { key: string, value: number } => {
+  const validEntries = Object.entries(priceData)
+        .filter(([, value]) => typeof value === 'number' && value !== 0);
+    
+    if (validEntries.length === 0) {
+        throw new Error('No valid non-zero price found in the data');
+    }
+    
+    const [minKey, minValue] = validEntries.reduce((min, curr) => 
+        curr[1] < min[1] ? curr : min
+    );
+    
+    return { key: minKey, value: minValue };
 }