fix: 修正差异数据框的样式应用方法

streamlit_validator_result.py

@@ -205,7 +205,7 @@ def _display_differences_dataframe(comparison_result: dict):
             return 'background-color: #e8f5e8; color: #2e7d32'
         return ''
     
-    styled_df = df_differences.style.applymap(
+    styled_df = df_differences.style.map(
         highlight_severity, 
         subset=['严重程度']
     ).format({'序号': '{:d}'})