更新pom.xml以添加reactor-netty-http依赖，修改ChatApplication以启用LlmApiProperties配置，优化ChatServiceImpl以处理LLM服务的JSON响应，添加内容提取和清理方法，更新application.yml以配置LLM服务的基本URL和日志级别。

src/main/java/com/yundage/chat/ChatApplication.java

@@ -1,13 +1,14 @@
 package com.yundage.chat;
 
+import com.yundage.chat.config.LlmApiProperties;
 import org.mybatis.spring.annotation.MapperScan;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration;
-
-@SpringBootApplication(exclude = {HibernateJpaAutoConfiguration.class})
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
 
+@SpringBootApplication
 @MapperScan("com.yundage.chat.mapper")
+@EnableConfigurationProperties(LlmApiProperties.class)
 public class ChatApplication {
 
     public static void main(String[] args) {