为LLMResponseGenerator类添加TaskStatusMixin混入，以增强任务有效性检查功能，确保在生成回答时任务状态的有效性。

src/voice_dialogue/services/text/generator.py

@@ -12,6 +12,7 @@ from voice_dialogue.config.user_config import get_prompt
 from voice_dialogue.core.base import BaseThread
 from voice_dialogue.core.constants import chat_history_cache
 from voice_dialogue.models.voice_task import VoiceTask, QuestionDisplayMessage
+from voice_dialogue.services.mixins import TaskStatusMixin
 from voice_dialogue.services.text.processor import (
     preprocess_sentence_text, create_langchain_chat_llamacpp_instance,
     create_langchain_pipeline, warmup_langchain_pipeline
@@ -19,7 +20,7 @@ from voice_dialogue.services.text.processor import (
 from voice_dialogue.utils.logger import logger
 
 
-class LLMResponseGenerator(BaseThread):
+class LLMResponseGenerator(BaseThread, TaskStatusMixin):
     """LLM 回答生成器 - 负责使用语言模型生成回答文本"""
 
     def __init__(
@@ -152,6 +153,10 @@ class LLMResponseGenerator(BaseThread):
 
         try:
             for chunk in pipeline.stream(input={'input': user_question}, config=config):
+
+                if not self.is_task_valid(voice_task):
+                    return
+
                 if not chunk.content:
                     continue
                 elif chunk.content in {'<think>', '\n\n', '</think>'}: