知识库改为qa模式

ui/smarttrade-platform/src/views/KnowledgeView.vue

@@ -594,7 +594,7 @@ const newKnowledge = ref({
   text: '',
   name: '',
   indexing_technique: "high_quality",
-  doc_form: "text_model",
+  doc_form: "qa_model",
   doc_language:"Chinese Simplified"
 })