修复

frontend/app/web-gold/src/views/material/Mix.vue

@@ -323,7 +323,7 @@ const formData = ref({
   produceCount: Number(localStorage.getItem('mix-produce-count')) || 3,
   totalDuration: 15,
   clipDuration: 5,
-  cropMode: 'center'
+  cropMode: localStorage.getItem('mix-crop-mode') || 'center'
 })
 
 const uiState = ref({
@@ -377,6 +377,11 @@ const saveProduceCount = () => {
   localStorage.setItem('mix-produce-count', formData.value.produceCount.toString())
 }
 
+// 监听裁剪模式变化，保存到 localStorage
+watch(() => formData.value.cropMode, (newVal) => {
+  localStorage.setItem('mix-crop-mode', newVal)
+})
+
 const getFileById = (fileId) => {
   let file = dataState.value.groupFiles.find(f => f.id === fileId)
   if (file) return file

frontend/app/web-gold/src/views/system/task-management/composables/useTaskOperations.js

@@ -118,15 +118,25 @@ export function useTaskOperations(apiHandlers, onSuccess) {
     })
   }
 
-  // 下载单个文件
-  function downloadFile(url, filename = 'download') {
-    const link = document.createElement('a')
-    link.href = url
-    link.download = filename
-    link.target = '_blank'
-    document.body.appendChild(link)
-    link.click()
-    document.body.removeChild(link)
+  // 下载单个文件（使用 fetch + blob 强制下载）
+  async function downloadFile(url, filename = 'download') {
+    try {
+      const response = await fetch(url)
+      if (!response.ok) throw new Error('下载失败')
+      const blob = await response.blob()
+      const blobUrl = URL.createObjectURL(blob)
+      const link = document.createElement('a')
+      link.href = blobUrl
+      link.download = filename
+      document.body.appendChild(link)
+      link.click()
+      document.body.removeChild(link)
+      URL.revokeObjectURL(blobUrl)
+    } catch (error) {
+      console.error('下载失败:', error)
+      // 降级：直接打开让浏览器处理
+      window.open(url, '_blank')
+    }
   }
 
   // 获取签名URL
@@ -156,17 +166,21 @@ export function useTaskOperations(apiHandlers, onSuccess) {
       }
 
       message.destroy()
-      message.loading('正在下载文件...', 0)
+      message.loading(`正在下载 ${downloadUrls.length} 个文件...`, 0)
 
-      // 逐个触发下载，避免浏览器阻止多个弹窗
-      downloadUrls.forEach((url, index) => {
-        setTimeout(() => {
-          downloadFile(url)
-        }, index * DOWNLOAD_INTERVAL)
-      })
+      // 逐个下载文件
+      for (let i = 0; i < downloadUrls.length; i++) {
+        const url = downloadUrls[i]
+        const filename = `video_${taskId}_${i + 1}.mp4`
+        await downloadFile(url, filename)
+        // 短暂延迟避免浏览器阻止
+        if (i < downloadUrls.length - 1) {
+          await new Promise(resolve => setTimeout(resolve, DOWNLOAD_INTERVAL))
+        }
+      }
 
       message.destroy()
-      message.success(`已触发 ${downloadUrls.length} 个文件的下载`)
+      message.success(`成功下载 ${downloadUrls.length} 个文件`)
     } catch (error) {
       message.destroy()
       message.error('下载失败，请稍后重试')

frontend/app/web-gold/src/views/system/task-management/mix-task/index.vue

@@ -50,10 +50,37 @@
           :row-key="record => record.id"
           :pagination="paginationConfig"
           :expanded-row-keys="expandedRowKeys"
+          :row-selection="rowSelection"
           :scroll="{ x: 'max-content' }"
           @change="handleTableChange"
           @expandedRowsChange="handleExpandedRowsChange"
         >
+          <!-- 批量操作工具栏 -->
+          <template #title>
+            <div class="batch-toolbar">
+              <a-space>
+                <span v-if="selectedRowKeys.length > 0">
+                  已选择 <strong>{{ selectedRowKeys.length }}</strong> 项
+                </span>
+                <a-button
+                  type="primary"
+                  :disabled="!hasDownloadableSelected"
+                  :loading="batchDownloading"
+                  @click="handleBatchDownloadSelected"
+                >
+                  <DownloadOutlined /> 批量下载 ({{ downloadableCount }})
+                </a-button>
+                <a-button
+                  danger
+                  :disabled="selectedRowKeys.length === 0"
+                  @click="handleBatchDeleteSelected"
+                >
+                  <DeleteOutlined /> 批量删除
+                </a-button>
+              </a-space>
+            </div>
+          </template>
+
           <template #bodyCell="{ column, record }">
             <!-- 标题列 -->
             <template v-if="column.key === 'title'">
@@ -187,9 +214,9 @@
 </template>
 
 <script setup>
-import { ref, reactive, onMounted } from 'vue'
-import { SearchOutlined, PlayCircleOutlined, DownloadOutlined } from '@ant-design/icons-vue'
-import { Modal } from 'ant-design-vue'
+import { ref, reactive, computed, onMounted } from 'vue'
+import { SearchOutlined, PlayCircleOutlined, DownloadOutlined, DeleteOutlined } from '@ant-design/icons-vue'
+import { Modal, message } from 'ant-design-vue'
 import { MixTaskService } from '@/api/mixTask'
 import { formatDate } from '@/utils/file'
 import { useTaskList } from '@/views/system/task-management/composables/useTaskList'
@@ -199,7 +226,7 @@ import TaskStatusTag from '@/views/system/task-management/components/TaskStatusT
 
 // Composables
 const { loading, list, filters, paginationConfig, fetchList, handleFilterChange, handleResetFilters, handleTableChange } = useTaskList(MixTaskService.getTaskPage)
-const { handleDelete, handleCancel, handleRetry, handleBatchDownload } = useTaskOperations(
+const { handleDelete, handleCancel, handleRetry, handleBatchDownload, handleBatchDelete } = useTaskOperations(
   { deleteApi: MixTaskService.deleteTask, cancelApi: MixTaskService.cancelTask, retryApi: MixTaskService.retryTask, getSignedUrlsApi: MixTaskService.getSignedUrls },
   fetchList
 )
@@ -209,6 +236,114 @@ useTaskPolling(MixTaskService.getTaskPage, { onTaskUpdate: fetchList })
 const expandedRowKeys = ref([])
 const handleExpandedRowsChange = (keys) => { expandedRowKeys.value = keys }
 
+// 批量选择
+const selectedRowKeys = ref([])
+const batchDownloading = ref(false)
+
+const rowSelection = computed(() => ({
+  selectedRowKeys: selectedRowKeys.value,
+  onChange: (keys) => {
+    selectedRowKeys.value = keys
+  }
+}))
+
+// 可下载的选中项
+const downloadableCount = computed(() => {
+  return list.value.filter(item =>
+    selectedRowKeys.value.includes(item.id) &&
+    isStatus(item.status, 'success') &&
+    item.outputUrls?.length > 0
+  ).length
+})
+
+const hasDownloadableSelected = computed(() => downloadableCount.value > 0)
+
+// 批量下载选中的任务（控制并发）
+const handleBatchDownloadSelected = async () => {
+  const downloadableTasks = list.value.filter(item =>
+    selectedRowKeys.value.includes(item.id) &&
+    isStatus(item.status, 'success') &&
+    item.outputUrls?.length > 0
+  )
+
+  if (downloadableTasks.length === 0) {
+    message.warning('没有可下载的任务')
+    return
+  }
+
+  batchDownloading.value = true
+  message.loading(`正在准备下载 ${downloadableTasks.length} 个任务的视频...`, 0)
+
+  try {
+    // 并发控制：同时最多下载 3 个任务
+    const CONCURRENCY = 3
+    let completed = 0
+    const total = downloadableTasks.length
+
+    for (let i = 0; i < downloadableTasks.length; i += CONCURRENCY) {
+      const batch = downloadableTasks.slice(i, i + CONCURRENCY)
+      await Promise.all(batch.map(async (task) => {
+        try {
+          const res = await MixTaskService.getSignedUrls(task.id)
+          if (res.code === 0 && res.data?.length > 0) {
+            // 下载该任务的所有视频
+            for (let j = 0; j < res.data.length; j++) {
+              await downloadFile(res.data[j], `video_${task.id}_${j + 1}.mp4`)
+            }
+          }
+        } catch (e) {
+          console.error(`任务 ${task.id} 下载失败:`, e)
+        }
+        completed++
+        message.destroy()
+        message.loading(`下载进度: ${completed}/${total}`, 0)
+      }))
+    }
+
+    message.destroy()
+    message.success(`成功下载 ${total} 个任务的视频`)
+  } catch (e) {
+    message.destroy()
+    message.error('批量下载失败')
+    console.error('批量下载失败:', e)
+  } finally {
+    batchDownloading.value = false
+  }
+}
+
+// 批量删除选中的任务
+const handleBatchDeleteSelected = () => {
+  const count = selectedRowKeys.value.length
+  Modal.confirm({
+    title: '确认批量删除',
+    content: `确定要删除选中的 ${count} 个任务吗？删除后无法恢复。`,
+    okType: 'danger',
+    onOk: async () => {
+      for (const id of selectedRowKeys.value) {
+        await MixTaskService.deleteTask(id)
+      }
+      message.success(`成功删除 ${count} 个任务`)
+      selectedRowKeys.value = []
+      fetchList()
+    }
+  })
+}
+
+// 下载单个文件（使用 fetch + blob 强制下载）
+const downloadFile = async (url, filename) => {
+  const response = await fetch(url)
+  if (!response.ok) throw new Error('下载失败')
+  const blob = await response.blob()
+  const blobUrl = URL.createObjectURL(blob)
+  const link = document.createElement('a')
+  link.href = blobUrl
+  link.download = filename
+  document.body.appendChild(link)
+  link.click()
+  document.body.removeChild(link)
+  URL.revokeObjectURL(blobUrl)
+}
+
 // 预览状态
 const preview = reactive({ visible: false, title: '', url: '' })
 
@@ -243,21 +378,18 @@ const previewVideo = async (record, index) => {
 
 const openPreview = (record) => previewVideo(record, 0)
 
-// 下载视频
+// 下载视频（使用 fetch + blob 强制下载）
 const downloadVideo = async (taskId, index) => {
   try {
     const res = await MixTaskService.getSignedUrls(taskId)
     if (res.code === 0 && res.data?.[index]) {
-      const link = document.createElement('a')
-      link.href = res.data[index]
-      link.download = `video_${taskId}_${index + 1}.mp4`
-      link.target = '_blank'
-      document.body.appendChild(link)
-      link.click()
-      document.body.removeChild(link)
+      const url = res.data[index]
+      const filename = `video_${taskId}_${index + 1}.mp4`
+      await downloadFile(url, filename)
     }
   } catch (e) {
-    console.error('获取下载链接失败:', e)
+    console.error('下载失败:', e)
+    message.error('下载失败')
   }
 }
 
@@ -315,6 +447,10 @@ onMounted(fetchList)
   box-shadow: var(--shadow-sm);
 }
 
+.batch-toolbar {
+  padding: var(--space-2) 0;
+}
+
 .title-cell {
   display: flex;
   align-items: center;