【需求 25171】feat: 每日抽奖配置新增批量删除功能

复用了已有的 deleteLotteryPrize（本来就接收 idList，不需要新加接口），加了
选择列，"本期奖品"那一行编辑/删除本来就是禁用的，复选框也跟着一起禁用，
避免勾进批量删除里。

src/views/backend/settingsMenu/dailyLotteryManage/index.vue

@@ -26,13 +26,23 @@
         <el-icon class="mr-2"><IEpSetting /></el-icon>
         抽奖配置
       </el-button>
+      <el-button type="danger" @click="handleBatchDelete" :disabled="selectedRows.length === 0">
+        批量删除
+      </el-button>
     </div>
 
     <!-- 表格区域 -->
     <div class="table-section">
       <!-- 表格 -->
       <div class="table-wrapper">
-        <el-table v-loading="loading" :data="list" height="100%">
+        <el-table
+          v-loading="loading"
+          :data="list"
+          height="100%"
+          @selection-change="handleSelectionChange"
+        >
+          <!-- 本期奖品不能编辑/删除，选择框也一并禁用，避免勾进批量删除里 -->
+          <el-table-column type="selection" width="55" :selectable="(row) => !row.isCurrent" />
           <el-table-column prop="name" label="名称" />
           <el-table-column prop="imageUrl" label="图片">
             <template #default="{ row }">
@@ -224,6 +234,25 @@ const lotteryConfigRef = ref<InstanceType<typeof LotteryConfig>>()
 const handleLotteryConfig = () => {
   lotteryConfigRef.value?.open()
 }
+
+const selectedRows = ref<BackendAddOrUpdateLotteryPrizeDto[]>([])
+// 选择
+const handleSelectionChange = (selection: BackendAddOrUpdateLotteryPrizeDto[]) => {
+  selectedRows.value = selection
+}
+
+// 批量删除：deleteLotteryPrize 本来就接收 idList，不用新加接口
+const handleBatchDelete = async () => {
+  await confirm({
+    title: '提示',
+    message: `确定要删除选中的 ${selectedRows.value.length} 个奖品吗？`,
+    type: 'danger',
+  })
+
+  await deleteLotteryPrize(selectedRows.value.map((item) => item.id!))
+  refresh()
+  push.success('删除成功')
+}
 </script>
 
 <style scoped lang="scss">