diff --git a/wwwroot/api/import_category_products.dspy b/wwwroot/api/import_category_products.dspy
index efe388c..9c1f846 100644
--- a/wwwroot/api/import_category_products.dspy
+++ b/wwwroot/api/import_category_products.dspy
@@ -2,6 +2,11 @@ result = {'widgettype': 'Message', 'options': {'title': 'Error', 'message': 'Inv
 
 try:
     category_id = params_kw.get('category_id', '')
+    # Debug: log incoming params to help diagnose tree selection issue
+    from appPublic.log import debug
+    raw_body = getattr(request, 'body', b'')
+    debug(f'[import_category] params_kw={dict(params_kw)}, category_id={category_id}, body={raw_body[:200] if raw_body else \"none\"}')
+
     if not category_id:
         raise ValueError('请先选择一个产品类别')