fix: 主题提取bug修复，了吗？

src/plugins/chat/config.py

@@ -41,8 +41,10 @@ class BotConfig:
     llm_normal_minor: Dict[str, str] = field(default_factory=lambda: {})
     embedding: Dict[str, str] = field(default_factory=lambda: {})
     vlm: Dict[str, str] = field(default_factory=lambda: {})
+
+    # 主题提取配置
     topic_extract: str = 'snownlp' # 只支持jieba,snownlp,llm
-    llm_topic_extract=llm_normal_minor
+    llm_topic_extract: Dict[str, str] = field(default_factory=lambda: {})
     
     API_USING: str = "siliconflow"  # 使用的API
     API_PAID: bool = False  # 是否使用付费API
@@ -124,6 +126,7 @@ class BotConfig:
                 
                 if "llm_normal" in model_config:
                     config.llm_normal = model_config["llm_normal"]
+                    config.llm_topic_extract = config.llm_normal
                 
                 if "llm_normal_minor" in model_config:
                     config.llm_normal_minor = model_config["llm_normal_minor"]