feat(shop): 添加商品配送奖金功能

- 在商品模型中新增配送奖金字段 deliveryMoney
- 添加配送奖金表单项，支持0-0.2范围内的数值输入
- 初始化表单时设置配送奖金默认值为0
- 配送奖金输入框支持两位小数精度和0.01步长调整

src/api/shop/shopGoods/model/index.ts

@@ -137,6 +137,8 @@ export interface ShopGoods {
   // 一级/二级分红（单位以服务端为准）
   firstDividend?: number;
   secondDividend?: number;
+  // 配送奖金
+  deliveryMoney?: number;
 }
 
 export interface BathSet {

src/views/shop/shopGoods/components/shopGoodsEdit.vue

@@ -580,6 +580,19 @@
                 </template>
               </a-input-number>
             </a-form-item>
+            <a-form-item label="配送费奖金" name="deliveryMoney">
+              <a-input-number
+                v-model:value="form.deliveryMoney"
+                :min="0"
+                :max="0.2"
+                :precision="2"
+                :step="0.01"
+                style="width: 250px"
+                placeholder="请输入配送费奖金"
+              >
+                <template #addonAfter>元</template>
+              </a-input-number>
+            </a-form-item>
           </template>
           <template v-if="form.type === 1 || merchantId">
             <a-form-item label="可用日期">
@@ -1109,6 +1122,7 @@ const form = reactive<ShopGoods>({
   thirdMoney: 0,
   firstDividend: 0,
   secondDividend: 0,
+  deliveryMoney: 0,
   position: undefined,
   price: undefined,
   originPrice: undefined,
@@ -1880,6 +1894,7 @@ const save = () => {
         form.thirdMoney = 0;
         form.firstDividend = 0;
         form.secondDividend = 0;
+        form.deliveryMoney = 0;
       }
       if (form.isOpenCommission === 1 && form.commissionType === 20) {
         // UI 输入：0~100；保存到后端：0~1（例如 10% => 0.1）