feat(material): remove video cover extraction and simplify upload API

- Remove extractVideoCoverOptional function and related video cover processing
- Update MaterialService.uploadFile method signature to remove coverBase64 parameter
- Simplify uploadAndIdentifyVideo function by removing cover generation logic
- Remove loading indicator from VideoSelector component during video preview
- Add presignGetUrlWithProcess method to FileClient interface for processed file URLs
- Add logging support to S3FileClient implementation

frontend/app/web-gold/src/components/VideoSelector.vue

@@ -251,12 +251,10 @@ const handlePreview = async (video) => {
   }
 
   // 显示加载提示
-  const hideLoading = message.loading('正在获取视频地址...', 0)
 
   try {
     // 调用后端API获取带签名的视频播放URL
     const res = await MaterialService.getVideoPlayUrl(video.id)
-    hideLoading()
 
     if (res.code === 0 && res.data) {
       previewVideo.value = video
@@ -266,7 +264,6 @@ const handlePreview = async (video) => {
       message.error(res.msg || '获取视频地址失败')
     }
   } catch (error) {
-    hideLoading()
     console.error('获取视频播放URL失败:', error)
     message.error('获取视频地址失败，请重试')
   }

frontend/app/web-gold/src/components/material/MaterialUploadModal.vue

@@ -144,7 +144,6 @@
 import { ref, watch, computed } from 'vue'
 import { message } from 'ant-design-vue'
 import { UploadOutlined, FileOutlined, LoadingOutlined, CheckCircleOutlined, CheckOutlined } from '@ant-design/icons-vue'
-import { isVideoFile, extractVideoCover } from '@/utils/video-cover'
 import { getFileName, getFileSize, formatFileSize } from '@/utils/file'
 import { useUpload } from '@/composables/useUpload'
 
@@ -153,10 +152,6 @@ const props = defineProps({
     type: Boolean,
     default: false
   },
-  uploading: {
-    type: Boolean,
-    default: false
-  },
   fileCategory: {
     type: String,
     default: 'video'
@@ -174,8 +169,6 @@ const { upload } = useUpload()
 
 // 数据
 const fileList = ref([])
-const fileCoverMap = ref(new Map())
-const DEFAULT_FILE_CATEGORY = 'video'
 const acceptTypes = 'video/*,image/*,audio/*,.mp4,.mov,.avi,.mkv,.jpg,.jpeg,.png,.gif,.webp,.mp3,.wav,.aac'
 
 // 常量
@@ -216,7 +209,6 @@ const getTotalSize = () => {
 watch(() => props.visible, (newVal) => {
   if (!newVal) {
     fileList.value = []
-    fileCoverMap.value.clear()
     resetUploadState()
   }
 })
@@ -266,7 +258,7 @@ const handleBeforeUpload = (file) => {
 }
 
 // 文件列表变化
-const handleFileChange = async (info) => {
+const handleFileChange = (info) => {
   const { file, fileList: newFileList } = info
 
   if (file && file.status !== 'uploading') {
@@ -278,25 +270,6 @@ const handleFileChange = async (info) => {
         return item
       })
       .filter(item => item.status !== 'removed')
-
-    // 如果是视频文件，自动提取封面
-    const fileObj = file.file || file.originFileObj || file
-    if (fileObj instanceof File && isVideoFile(fileObj)) {
-      const fileKey = file.uid || fileObj.name
-
-      if (!fileCoverMap.value.has(fileKey)) {
-        try {
-          const coverResult = await extractVideoCover(fileObj, {
-            maxWidth: 800,
-            quality: 0.8
-          })
-          fileCoverMap.value.set(fileKey, coverResult.base64)
-          console.log(`[封面提取成功] ${fileObj.name}`)
-        } catch (error) {
-          console.warn(`[封面提取失败] ${fileObj.name}:`, error)
-        }
-      }
-    }
   }
 }
 
@@ -307,9 +280,6 @@ const handleRemove = (fileItem) => {
     (getFileName(item) === getFileName(fileItem))
   )
   if (index > -1) {
-    const removed = fileList.value[index]
-    const fileKey = removed.uid || getFileName(removed)
-    fileCoverMap.value.delete(fileKey)
     fileList.value.splice(index, 1)
   }
 }
@@ -327,71 +297,65 @@ const handleConfirm = async () => {
     return
   }
 
-  // 提取文件对象和对应的封面
-  const filesWithCover = fileList.value
+  // 提取文件对象
+  const files = fileList.value
     .map(item => {
       const fileObj = item.file || item.originFileObj || item
       if (!(fileObj instanceof File)) return null
-
-      const fileKey = item.uid || fileObj.name
-      return {
-        file: fileObj,
-        coverBase64: fileCoverMap.value.get(fileKey) || null
-      }
+      return fileObj
     })
     .filter(item => item !== null)
 
-  if (filesWithCover.length === 0) {
+  if (files.length === 0) {
     message.error('无法获取文件对象，请重新选择文件')
     return
   }
 
   // 开始上传
-  await performUpload(filesWithCover)
+  await performUpload(files)
 }
 
 // 执行上传
-const performUpload = async (filesWithCover) => {
+const performUpload = async (files) => {
   uploading.value = true
-  totalUploadCount.value = filesWithCover.length
+  totalUploadCount.value = files.length
   currentUploadIndex.value = 0
   completedFiles.value = []
 
-  // 使用传入的fileCategory，如果没有则使用默认值
-  const category = props.fileCategory || DEFAULT_FILE_CATEGORY
+  // 使用传入的fileCategory
+  const category = props.fileCategory || 'video'
   let successCount = 0
   let failCount = 0
 
-  for (let i = 0; i < filesWithCover.length; i++) {
-    const fileWithCover = filesWithCover[i]
+  for (let i = 0; i < files.length; i++) {
+    const file = files[i]
     currentUploadIndex.value = i + 1
-    currentFileName.value = fileWithCover.file.name
-    currentFileSize.value = fileWithCover.file.size
+    currentFileName.value = file.name
+    currentFileSize.value = file.size
     currentFileUploaded.value = 0
     currentFileProgress.value = 0
 
     try {
-      await upload(fileWithCover.file, {
+      await upload(file, {
         fileCategory: category,
         groupId: props.groupId,
-        coverBase64: fileWithCover.coverBase64,
         onProgress: (progress) => {
           currentFileProgress.value = progress
           currentFileUploaded.value = Math.round((progress / 100) * currentFileSize.value)
         },
         onSuccess: () => {
-          console.log('文件上传成功:', fileWithCover.file.name)
+          console.log('文件上传成功:', file.name)
           successCount++
           completedFiles.value.push({
-            name: fileWithCover.file.name,
+            name: file.name,
             success: true
           })
         },
         onError: (error) => {
-          console.error('文件上传失败:', fileWithCover.file.name, error)
+          console.error('文件上传失败:', file.name, error)
           failCount++
           completedFiles.value.push({
-            name: fileWithCover.file.name,
+            name: file.name,
             success: false
           })
         }
@@ -400,7 +364,7 @@ const performUpload = async (filesWithCover) => {
       console.error('上传异常:', error)
       failCount++
       completedFiles.value.push({
-        name: fileWithCover.file.name,
+        name: file.name,
         success: false
       })
     }