fix: 使用JSON.stringify确保数据序列化

src/api/product.js

@@ -100,15 +100,13 @@ export default {
   saveCategoryAttributes(categoryId, attrs) {
     const token = uni.getStorageSync('token')
     const role = uni.getStorageSync('role') || ''
-    // 确保是数组格式
-    const payload = Array.isArray(attrs) ? attrs : [attrs]
     return new Promise((resolve, reject) => {
       uni.request({
         url: `${import.meta.env.VITE_API_BASE_URL}/products/categories/${categoryId}/attributes`,
         method: 'POST',
-        data: payload,
+        data: JSON.stringify(attrs),
         header: {
-          'Content-Type': 'application/json',
+          'Content-Type': 'application/json;charset=utf-8',
           'Authorization': token ? `Bearer ${token}` : '',
           'X-User-Role': role
         },