feat: enhance model downloading logic to support different repository modes

mineru/utils/models_download_utils.py

@@ -51,9 +51,17 @@ def auto_download_and_get_model_root_path(relative_path: str, repo_mode='pipelin
     else:
         raise ValueError(f"未知的仓库类型: {model_source}")
 
+    cache_dir = None
+
+    if repo_mode == 'pipeline':
         relative_path = relative_path.strip('/')
         cache_dir = snapshot_download(repo, allow_patterns=[relative_path, relative_path+"/*"])
+    elif repo_mode == 'vlm':
+        # VLM 模式下，直接下载整个模型目录
+        cache_dir = snapshot_download(repo)
 
+    if not cache_dir:
+        raise FileNotFoundError(f"Failed to download model: {relative_path} from {repo}")
     return cache_dir