调整公共模块结构，方便后续延伸

ai/src/core.rs

@@ -1,5 +1,5 @@
 use crate::toolkit::{call_tools, get_tool};
-use common::ai::{
+use common::model::ai::{
     ChatCompletionRequestBody, ChatCompletionRequestExtra, ChatCompletionRequestMessage,
     ChatCompletionRequestThinking, ChatCompletionResponseBody,
 };
@@ -13,7 +13,6 @@ pub async fn send_message(
     let result = request_llm(messages).await;
     match result {
         Ok(result) => {
-            // println!("result:");
             for choice in result.unwrap().choices {
                 let messsage_content = choice.message.content;
                 let messsage_reasoning = choice.message.reasoning_content.unwrap_or_default();

ai/src/toolkit.rs

@@ -2,7 +2,7 @@ use chrono::Local;
 use serde_json::error;
 
 use common::{
-    ai::ChatCompletionToolCall,
+    model::ai::ChatCompletionToolCall,
     queue::{ChannelMessage, QueueMessage},
 };