fix: add error handling for block parsing in vlm_magic_model.py

mineru/backend/vlm/vlm_magic_model.py

 import re
 from typing import Literal
 
+from loguru import logger
+
 from mineru.utils.boxbase import bbox_distance, is_in
 from mineru.utils.enum_class import ContentType, BlockType, SplitFlag
 from mineru.backend.vlm.vlm_middle_json_mkcontent import merge_para_with_text
@@ -22,6 +24,7 @@ class MagicModel:
         # 解析每个块
         for index, block_info in enumerate(block_infos):
             block_bbox = block_info[0].strip()
+            try:
                 x1, y1, x2, y2 = map(int, block_bbox.split())
                 x_1, y_1, x_2, y_2 = (
                     int(x1 * width / 1000),
@@ -41,6 +44,10 @@ class MagicModel:
                 # print(f"类型: {block_type}")
                 # print(f"内容: {block_content}")
                 # print("-" * 50)
+            except Exception as e:
+                # 如果解析失败，可能是因为格式不正确，跳过这个块
+                logger.warning(f"Invalid block format: {block_info}, error: {e}")
+                continue
 
             span_type = "unknown"
             if block_type in [