feat(组件): 添加文件预览列表组件

- 实现 FilePreviewItem 展示单个文件信息
- 根据文件类型显示对应图标和颜色
- 图片文件显示缩略图预览
- 显示文件名、大小和上传状态
- 支持上传进度条展示
- 提供悬浮删除按钮

src/components/features/FilePreviewList.tsx

@@ -0,0 +1,147 @@
+'use client';
+
+import { X, File, FileImage, FileText, FileSpreadsheet, FileCode, FileArchive, Loader2 } from 'lucide-react';
+import { cn } from '@/lib/utils';
+import { UploadFile, FileType, formatFileSize } from '@/types/file-upload';
+import Image from 'next/image';
+
+interface FilePreviewListProps {
+  files: UploadFile[];
+  onRemove: (fileId: string) => void;
+  className?: string;
+}
+
+// 根据文件类型获取图标
+function getFileIcon(fileType: FileType) {
+  switch (fileType) {
+    case 'image':
+      return FileImage;
+    case 'pdf':
+    case 'document':
+      return FileText;
+    case 'spreadsheet':
+      return FileSpreadsheet;
+    case 'code':
+    case 'markdown':
+      return FileCode;
+    case 'archive':
+      return FileArchive;
+    default:
+      return File;
+  }
+}
+
+// 根据文件类型获取颜色
+function getFileColor(fileType: FileType): string {
+  switch (fileType) {
+    case 'image':
+      return 'text-blue-500';
+    case 'pdf':
+      return 'text-red-500';
+    case 'document':
+      return 'text-blue-600';
+    case 'spreadsheet':
+      return 'text-green-500';
+    case 'code':
+    case 'markdown':
+      return 'text-purple-500';
+    case 'archive':
+      return 'text-orange-500';
+    default:
+      return 'text-gray-500';
+  }
+}
+
+interface FilePreviewItemProps {
+  file: UploadFile;
+  onRemove: (fileId: string) => void;
+}
+
+function FilePreviewItem({ file, onRemove }: FilePreviewItemProps) {
+  const Icon = getFileIcon(file.type);
+  const colorClass = getFileColor(file.type);
+
+  return (
+    <div
+      className={cn(
+        'relative group flex items-center gap-2 p-2 rounded-lg border transition-all',
+        'bg-[var(--color-bg-secondary)] border-[var(--color-border)]',
+        'hover:border-[var(--color-border-hover)]',
+        file.status === 'error' && 'border-red-500 bg-red-50 dark:bg-red-950/20'
+      )}
+    >
+      {/* 文件预览/图标 */}
+      <div className="flex-shrink-0 w-10 h-10 rounded-lg overflow-hidden bg-[var(--color-bg-tertiary)] flex items-center justify-center">
+        {file.type === 'image' && file.previewUrl ? (
+          <Image
+            src={file.previewUrl}
+            alt={file.name}
+            width={40}
+            height={40}
+            className="w-full h-full object-cover"
+          />
+        ) : (
+          <Icon className={cn('w-5 h-5', colorClass)} />
+        )}
+      </div>
+
+      {/* 文件信息 */}
+      <div className="flex-1 min-w-0">
+        <p className="text-sm font-medium text-[var(--color-text-primary)] truncate" title={file.name}>
+          {file.name}
+        </p>
+        <p className="text-xs text-[var(--color-text-tertiary)]">
+          {formatFileSize(file.size)}
+          {file.status === 'error' && file.error && (
+            <span className="text-red-500 ml-2">{file.error}</span>
+          )}
+        </p>
+      </div>
+
+      {/* 状态指示器 */}
+      {file.status === 'uploading' && (
+        <div className="flex-shrink-0">
+          <Loader2 className="w-4 h-4 animate-spin text-[var(--color-primary)]" />
+        </div>
+      )}
+
+      {/* 进度条 */}
+      {file.status === 'uploading' && (
+        <div className="absolute bottom-0 left-0 right-0 h-0.5 bg-gray-200 dark:bg-gray-700 rounded-b-lg overflow-hidden">
+          <div
+            className="h-full bg-[var(--color-primary)] transition-all duration-300"
+            style={{ width: `${file.uploadProgress}%` }}
+          />
+        </div>
+      )}
+
+      {/* 删除按钮 */}
+      <button
+        onClick={() => onRemove(file.id)}
+        className={cn(
+          'flex-shrink-0 w-6 h-6 rounded-full flex items-center justify-center',
+          'text-[var(--color-text-tertiary)] hover:text-[var(--color-text-primary)]',
+          'hover:bg-[var(--color-bg-hover)] transition-colors',
+          'opacity-0 group-hover:opacity-100'
+        )}
+        title="移除文件"
+      >
+        <X className="w-4 h-4" />
+      </button>
+    </div>
+  );
+}
+
+export function FilePreviewList({ files, onRemove, className }: FilePreviewListProps) {
+  if (files.length === 0) {
+    return null;
+  }
+
+  return (
+    <div className={cn('flex flex-wrap gap-2', className)}>
+      {files.map((file) => (
+        <FilePreviewItem key={file.id} file={file} onRemove={onRemove} />
+      ))}
+    </div>
+  );
+}