feat(file): 将文件管理页面预览按钮替换为下载按钮

- 移除预览按钮及相关的handlePreview函数
- 新增下载按钮，使用download图标
- 实现handleDownload函数，支持直接下载文件
- 添加权限控制，需要FILE.LIST权限才能显示下载按钮
- 优化表格列对齐方式，统一使用center对齐
- 下载功能支持原始文件名保持，提升用户体验

src/views/system/file/index.vue

@@ -314,7 +314,7 @@ import {
 } from '@/service/api/system/file'
 import type { SysFileQueryBo, SysFileSearchForm, SysFileVo } from '@/service/api/system/file'
 import IconParkOutlineDelete from '~icons/icon-park-outline/delete'
-import IconParkOutlinePreviewOpen from '~icons/icon-park-outline/preview-open'
+import IconParkOutlineDownload from '~icons/icon-park-outline/download'
 
 // 文件分类图标组件
 const StarIcon = () => h('span', { class: 'text-yellow-500' }, '✨')
@@ -400,6 +400,7 @@ const columns: DataTableColumns<SysFileVo> = [
   {
     title: '序号',
     key: 'index',
+    align: 'center',
     width: 80,
     render: (_, index) => {
       return (pagination.value.page - 1) * pagination.value.pageSize + index + 1
@@ -409,6 +410,7 @@ const columns: DataTableColumns<SysFileVo> = [
     title: '文件原始名称',
     key: 'fileName',
     width: 200,
+    align: 'center',
     ellipsis: {
       tooltip: true,
     },
@@ -417,6 +419,7 @@ const columns: DataTableColumns<SysFileVo> = [
     title: '文件新名称',
     key: 'newName',
     width: 200,
+    align: 'center',
     ellipsis: {
       tooltip: true,
     },
@@ -425,6 +428,7 @@ const columns: DataTableColumns<SysFileVo> = [
     title: '文件后缀',
     key: 'fileSuffix',
     width: 100,
+    align: 'center',
     render: (row) => {
       return h(NTag, {
         type: 'primary',
@@ -436,6 +440,7 @@ const columns: DataTableColumns<SysFileVo> = [
     title: '文件上传路径',
     key: 'fileUpload',
     width: 250,
+    align: 'center',
     ellipsis: {
       tooltip: true,
     },
@@ -444,6 +449,7 @@ const columns: DataTableColumns<SysFileVo> = [
     title: '文件回显路径',
     key: 'filePath',
     width: 200,
+    align: 'center',
     ellipsis: {
       tooltip: true,
     },
@@ -471,6 +477,7 @@ const columns: DataTableColumns<SysFileVo> = [
   {
     title: '文件服务类型',
     key: 'fileService',
+    align: 'center',
     width: 120,
     render: (row) => {
       const serviceMap: Record<string, { type: 'success' | 'info' | 'warning', text: string }> = {
@@ -488,6 +495,7 @@ const columns: DataTableColumns<SysFileVo> = [
   {
     title: '创建时间',
     key: 'createTime',
+    align: 'center',
     width: 160,
     render: (row) => {
       return row.createTime ? new Date(row.createTime).toLocaleString() : '--'
@@ -502,17 +510,19 @@ const columns: DataTableColumns<SysFileVo> = [
     render: (row) => {
       const buttons = []
 
-      // 预览按钮
-      buttons.push(h(NButton, {
-        type: 'primary',
-        size: 'small',
-        onClick: () => handlePreview(row),
-      }, {
-        icon: () => h(NIcon, { size: 14, style: 'transform: translateY(-1px)' }, {
-          default: () => h(IconParkOutlinePreviewOpen),
-        }),
-        default: () => '预览',
-      }))
+      // 下载按钮
+      if (hasPermission(PERMISSIONS.FILE.LIST)) {
+        buttons.push(h(NButton, {
+          type: 'primary',
+          size: 'small',
+          onClick: () => handleDownload(row),
+        }, {
+          icon: () => h(NIcon, { size: 14, style: 'transform: translateY(-1px)' }, {
+            default: () => h(IconParkOutlineDownload),
+          }),
+          default: () => '下载',
+        }))
+      }
 
       // 删除按钮
       if (hasPermission(PERMISSIONS.FILE.DELETE)) {
@@ -648,10 +658,23 @@ async function handleBatchDelete() {
   }
 }
 
-// 预览文件
-function handlePreview(row: SysFileVo) {
+// 下载文件
+function handleDownload(row: SysFileVo) {
   if (row.filePath) {
-    handleImagePreview(row.filePath, row.fileName)
+    const link = document.createElement('a')
+    link.href = row.filePath
+    link.download = row.fileName || '下载文件'
+    link.target = '_blank'
+
+    // 添加到DOM并触发点击
+    document.body.appendChild(link)
+    link.click()
+    document.body.removeChild(link)
+
+    coiMsgSuccess('文件下载已开始')
+  }
+  else {
+    coiMsgError('文件路径不存在，无法下载')
   }
 }