refactor(yudao-module-llm): 重构 ModelService 中的代码

- 删除了未使用的代码片段
- 简化了响应数据的处理逻辑
-

yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/http/ModelService.java

@@ -175,38 +175,6 @@ public class ModelService {
 
         }
 
-//
-//        //         解析响应内容
-//        log.info("正在解析响应内容...");
-//        ChatCompletion chatCompletion = JSON.parseObject(result, ChatCompletion.class);
-//
-//        // 检查响应内容是否包含错误信息
-//        if (StringUtils.isBlank(chatCompletion.getDetail())) {
-//            log.info("响应内容无错误信息，提取回答内容...");
-//
-//            // 提取回答内容
-//            String respContent = chatCompletion.getChoices().get(0).getMessage().getContent();
-//            String patternString = "(<think>.*?</think>)";
-//            Pattern pattern = Pattern.compile(patternString, Pattern.DOTALL);
-//            Matcher matcher = pattern.matcher(respContent);
-//            String answerContent = matcher.replaceAll("");
-//
-//            // 构建返回对象
-//            ModelCompletionsRespVO respVO = new ModelCompletionsRespVO();
-//            respVO.setSystem("助手");
-//            respVO.setQuestion(req.getMessages().get(req.getMessages().size() - 1).getContent());
-//            respVO.setAnswer(answer);
-//
-//            log.info("模型补全请求处理成功。返回结果: {}", JSON.toJSONString(respVO));
-//            return respVO;
-//
-//        } else {
-//            log.warn("响应内容包含错误信息，返回 null");
-//            return null;
-//        }
-//        return null;
-
-        // 构建返回对象
         ModelCompletionsRespVO respVO = new ModelCompletionsRespVO();
         respVO.setSystem("助手");
         respVO.setQuestion(req.getMessages().get(req.getMessages().size() - 1).getContent());
@@ -281,13 +249,11 @@ public class ModelService {
                 }
 
                 log.info("接收到的响应行数据: {}", line);
-                line = line.replaceAll("\n", " ");
                 String content = parseStreamLine(line, uuid);
                 if (content != null) {
                     emitter.send(
                             SseEmitter.event()
                                     .data(content, MediaType.TEXT_EVENT_STREAM)
-                                    .reconnectTime(5000)
                     );
                     log.info("已发送数据：{}", content);
                 }
@@ -296,11 +262,10 @@ public class ModelService {
                     result.append(chatReqVO.getContent());
                 }
 
-                // 心跳检测
-                if (System.currentTimeMillis() - lastSendTime > 15_000) {
-                    emitter.send(SseEmitter.event().comment("heartbeat"));
-                    lastSendTime = System.currentTimeMillis();
-                }
+//                // 心跳检测
+//                if (System.currentTimeMillis() - lastSendTime > MAX_IDLE_TIME && !result.toString().isEmpty()) {
+//                    emitter.send("[HEARTBEAT]");
+//                }
             }
             emitter.complete();
         } catch (IOException e) {