优化

src/modules/first-leg/utils/productImage.ts

@@ -0,0 +1,14 @@
+const allowedTypes = new Set(['image/jpeg', 'image/png'])
+const allowedExtensions = new Set(['jpg', 'jpeg', 'png'])
+
+export const PRODUCT_IMAGE_MAX_SIZE = 5 * 1024 * 1024
+
+export function validateProductImageFile(file: Pick<File, 'name' | 'size' | 'type'>) {
+  const extension = file.name.split('.').pop()?.toLowerCase() ?? ''
+  if (!allowedTypes.has(file.type.toLowerCase()) || !allowedExtensions.has(extension)) {
+    return '产品图片仅支持 JPG、JPEG、PNG 格式'
+  }
+  if (file.size <= 0) return '产品图片内容为空'
+  if (file.size > PRODUCT_IMAGE_MAX_SIZE) return '产品图片不能超过 5MB'
+  return ''
+}