fix(magic_pdf): correct end page index and improve error handling

- Adjust end_page_id calculation to prevent IndexError when accessing pages
- Enhance error handling in LLM post-processing by specifically catching JSONDecodeError

magic_pdf/model/doc_analyze_by_custom_model.py

@@ -158,7 +158,7 @@ def doc_analyze(
     table_enable=None,
 ) -> InferenceResult:
 
-    end_page_id = end_page_id if end_page_id else len(dataset)
+    end_page_id = end_page_id if end_page_id else len(dataset) - 1
 
     model_manager = ModelSingleton()
     custom_model = model_manager.get_model(

magic_pdf/post_proc/llm_aided.py

@@ -151,7 +151,7 @@ Corrected title list:
                 logger.warning("The number of titles in the optimized result is not equal to the number of titles in the input.")
                 retry_count += 1
         except Exception as e:
-            if e is json.JSONDecodeError:
+            if isinstance(e, json.decoder.JSONDecodeError):
                 logger.warning(f"JSON decode error on attempt {retry_count + 1}: {e}")
             else:
                 logger.exception(e)