Merge remote-tracking branch 'origin/chonggou' into chonggou

# Conflicts:
#	webmainbench/metrics/base_content_splitter.py

Author: 1041206149

webmainbench/metrics/formula_extractor.py

@@ -52,8 +52,11 @@ def extract(self, text: str, field_name: str = None) -> str:
         if self.should_use_llm(field_name):
             print(f"[DEBUG] 使用LLM增强公式提取")
             formula_parts = self.enhance_with_llm(regex_formulas)
+            if not formula_parts:
+                print("[DEBUG] LLM增强后无有效公式")
         else:
             formula_parts = regex_formulas
+            print("[DEBUG] 跳过LLM增强，使用基础正则结果")
         return '\n'.join(formula_parts)
 
     def extract_basic(self, text: str) -> List[str]: