fix：

1.修改提示词与说话人注入，减少模型每次回答都带着说话人信息

main/xiaozhi-server/core/utils/dialogue.py

@@ -92,7 +92,8 @@ class Dialogue:
         return result
 
     def get_llm_dialogue_with_memory(
-            self, memory_str: str = None, voiceprint_config: dict = None
+            self, memory_str: str = None, voiceprint_config: dict = None,
+            current_speaker: str = None,
     ) -> List[Dict[str, str]]:
         # 构建对话
         dialogue = []
@@ -145,8 +146,12 @@ class Dialogue:
             # 追加说话人信息
             try:
                 speakers = voiceprint_config.get("speakers", [])
-                if speakers:
+                current_speaker_name = (current_speaker or "").strip()
+                if speakers or (current_speaker_name and current_speaker_name != "未知说话人"):
                     dynamic_part += "\n<speakers_info>"
+                    # 当前说话人置于块首，确保弱模型也能稳定获取身份
+                    if current_speaker_name and current_speaker_name != "未知说话人":
+                        dynamic_part += f"\n当前说话人：{current_speaker_name}"
                     for speaker_str in speakers:
                         try:
                             parts = speaker_str.split(",", 2)