Implement API URL resolution for OpenAICompatibleTTSService to handle both base and full speech endpoint formats.

engine/services/openai_compatible_tts.py

@@ -10,6 +10,7 @@ import os
 import asyncio
 import aiohttp
 from typing import AsyncIterator, Optional
+from urllib.parse import urlparse, urlunparse
 from loguru import logger
 
 from services.base import BaseTTSService, TTSChunk, ServiceState
@@ -74,11 +75,36 @@ class OpenAICompatibleTTSService(BaseTTSService):
         
         self.api_key = api_key or os.getenv("TTS_API_KEY") or os.getenv("SILICONFLOW_API_KEY")
         self.model = model
-        self.api_url = api_url or os.getenv("TTS_API_URL") or "https://api.siliconflow.cn/v1/audio/speech"
+        raw_api_url = api_url or os.getenv("TTS_API_URL") or "https://api.siliconflow.cn/v1/audio/speech"
+        self.api_url = self._resolve_speech_endpoint(raw_api_url)
         
         self._session: Optional[aiohttp.ClientSession] = None
         self._cancel_event = asyncio.Event()
 
+    @staticmethod
+    def _resolve_speech_endpoint(api_url: str) -> str:
+        """
+        Accept either:
+        - base URL: https://host/v1
+        - full speech endpoint: https://host/v1/audio/speech
+        and always return the final speech endpoint URL.
+        """
+        raw = str(api_url or "").strip()
+        if not raw:
+            return "https://api.siliconflow.cn/v1/audio/speech"
+
+        parsed = urlparse(raw)
+        path = (parsed.path or "").rstrip("/")
+        if path.endswith("/audio/speech"):
+            return raw
+
+        if not path:
+            new_path = "/audio/speech"
+        else:
+            new_path = f"{path}/audio/speech"
+
+        return urlunparse(parsed._replace(path=new_path))
+    
     async def connect(self) -> None:
         """Initialize HTTP session."""
         if not self.api_key: