first implementation

backend/src/main/java/com/aiteacher/config/AiConfig.java

@@ -0,0 +1,21 @@
+package com.aiteacher.config;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.ai.chat.client.ChatClient;
+import org.springframework.ai.chat.model.ChatModel;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class AiConfig {
+
+    @Bean
+    public ObjectMapper objectMapper() {
+        return new ObjectMapper();
+    }
+
+    @Bean
+    public ChatClient chatClient(ChatModel chatModel) {
+        return ChatClient.builder(chatModel).build();
+    }
+}