fix:preview 异常

src/main/java/cn/com/poc/agent_application/aggregate/impl/AgentApplicationInfoServiceImpl.java

@@ -401,7 +401,7 @@ public class AgentApplicationInfoServiceImpl implements AgentApplicationInfoServ
                 }
                 knowledgeIds.add(knowledgeDocumentEntity.getKnowledgeId());
             }
-            Object content = messages.get(messages.size() - 1).getContent();
+            Object content = messages.get(messages.size() - 1);
             String query = "";
             if (content instanceof List) {
                 query = ((List<MultiContent>) content).get(0).getText();