fix/various fixes

api/app/adapters/llm/deepseek.py

@@ -6,7 +6,12 @@ from langchain_openai import ChatOpenAI
 
 
 class DeepSeekLLMProvider:
-    """LangChain-based LLM adapter for DeepSeek and OpenAI-compatible APIs."""
+    """LangChain-based LLM adapter for DeepSeek and OpenAI-compatible APIs.
+
+    `langchain_llm` 供 Agent / 任务同步调用；若需 JSON object 模式，请用
+    `app.core.langchain_llm.bind_json_object_mode` 绑定，勿使用已废弃的
+    `bind(model_kwargs={"response_format": ...})`。
+    """
 
     def __init__(
         self,

api/app/adapters/tts/tencent_tts.py

@@ -127,7 +127,12 @@ class TencentTTSProvider:
             logger.error("Tencent TTS credentials not configured")
             return b""
 
-        voice_type = VOICE_MAP.get(voice.lower(), self._voice_type)
+        # Default "alloy" aligns with OpenAI TTS naming; Tencent uses VoiceType IDs from settings.
+        v = voice.lower()
+        if v == "alloy":
+            voice_type = self._voice_type
+        else:
+            voice_type = VOICE_MAP.get(v, self._voice_type)
         chunks = _chunk_text(text)
         if not chunks:
             return b""