fix: cannot upload file to onedrive because file info not match (fix #1215)

Path in onedrive is not case-sensitive while Cloudreve cares, thus file size is not matching when finishing upload.

pkg/filesystem/manage.go

@@ -379,10 +379,14 @@ func (fs *FileSystem) listObjects(ctx context.Context, parent string, files []mo
 // CreateDirectory 根据给定的完整创建目录，支持递归创建。如果目录已存在，则直接
 // 返回已存在的目录。
 func (fs *FileSystem) CreateDirectory(ctx context.Context, fullPath string) (*model.Folder, error) {
-	if fullPath == "/" || fullPath == "." || fullPath == "" {
+	if fullPath == "." || fullPath == "" {
 		return nil, ErrRootProtected
 	}
 
+	if fullPath == "/" {
+		return fs.User.Root()
+	}
+
 	// 获取要创建目录的父路径和目录名
 	fullPath = path.Clean(fullPath)
 	base := path.Dir(fullPath)