fix: ChatTTS检测改用同步requests，解决async问题

requirements.txt

@@ -2,4 +2,5 @@ fastapi==0.110.0
 uvicorn==0.27.1
 python-multipart==0.0.9
 aiohttp==3.9.3
-edge-tts==6.1.9
+edge-tts==6.1.9
+requests==2.31.0

tts_service.py

@@ -108,32 +108,59 @@ class EdgeTTSProvider(TTSProvider):
 
 
 class ChatTTSProvider(TTSProvider):
-    """ChatTTS 提供者（本地部署，预留接口）"""
+    """ChatTTS 提供者（本地部署）"""
     
-    # 预留配置
-    CHATTTS_URL = os.getenv("CHATTTS_URL", "http://localhost:19020")
+    # ChatTTS 服务地址
+    CHATTTS_URL = os.getenv("CHATTTS_URL", "http://192.168.2.5:12002")
     
     def __init__(self):
-        self._available = False  # 暂不可用
+        self._available = None
     
     async def synthesize(self, text: str) -> Tuple[str, str]:
-        """
-        使用 ChatTTS 合成语音
-        TODO: 后续实现
-        """
-        raise NotImplementedError("ChatTTS 尚未实现，请先部署 ChatTTS 服务")
+        """使用 ChatTTS 合成语音"""
+        import aiohttp
+        
+        async with aiohttp.ClientSession() as session:
+            form = aiohttp.FormData()
+            form.add_field('text', text)
+            
+            async with session.post(
+                f"{self.CHATTTS_URL}/synthesize",
+                data=form,
+                timeout=aiohttp.ClientTimeout(total=60)
+            ) as resp:
+                if resp.status != 200:
+                    error = await resp.text()
+                    raise Exception(f"ChatTTS error: {error}")
+                
+                data = await resp.json()
+                # ChatTTS 返回的 URL 是相对路径，需要拼接
+                audio_url = f"{self.CHATTTS_URL}{data['audio_url']}"
+                return None, audio_url
     
     def get_name(self) -> str:
         return "ChatTTS"
     
     def is_available(self) -> bool:
         """检查 ChatTTS 是否可用"""
-        # TODO: 后续实现检测逻辑
+        if self._available is None:
+            try:
+                import requests
+                resp = requests.get(f"{self.CHATTTS_URL}/health", timeout=5)
+                if resp.status_code == 200:
+                    data = resp.json()
+                    self._available = data.get("status") == "ok"
+                else:
+                    self._available = False
+            except Exception as e:
+                logger.warning(f"ChatTTS check failed: {e}")
+                self._available = False
         return self._available
     
-    def set_available(self, available: bool):
-        """设置可用状态（部署后调用）"""
-        self._available = available
+    def set_url(self, url: str):
+        """设置服务地址"""
+        self.CHATTTS_URL = url
+        self._available = None  # 重新检测
 
 
 class NoTTSProvider(TTSProvider):