fix 不开下载器监控，link测试无意义

app/modules/filetransfer/__init__.py

@@ -46,7 +46,7 @@ class FileTransferModule(_ModuleBase):
             library_path = Path(path)
             if not library_path.exists():
                 return False, f"目录不存在：{library_path}"
-            if settings.TRANSFER_TYPE == "link":
+            if settings.DOWNLOADER_MONITOR and settings.TRANSFER_TYPE == "link":
                 if library_path.stat().st_dev != download_devid:
                     return False, f"下载目录 {download_path} 与媒体库目录 {library_path} 不在同一设备，将无法硬链接"
         return True, ""