完善fastapi接口

api/schemas/tts.py

@@ -2,19 +2,32 @@
 TTS API schemas
 """
 
+from typing import Optional
 from pydantic import BaseModel, Field
 
 
 class TTSSynthesizeRequest(BaseModel):
     """TTS synthesis request"""
     text: str = Field(..., description="Text to synthesize")
-    voice_id: str = Field("[Chinese] zh-CN Yunjian", description="Voice ID")
+    workflow: Optional[str] = Field(
+        None, 
+        description="TTS workflow key (e.g., 'runninghub/tts_edge.json' or 'selfhost/tts_edge.json'). If not specified, uses default workflow from config."
+    )
+    ref_audio: Optional[str] = Field(
+        None, 
+        description="Reference audio path for voice cloning (optional). Can be a local file path or URL."
+    )
+    voice_id: Optional[str] = Field(
+        None, 
+        description="Voice ID (deprecated, use workflow instead)"
+    )
     
     class Config:
         json_schema_extra = {
             "example": {
                 "text": "Hello, welcome to Pixelle-Video!",
-                "voice_id": "[Chinese] zh-CN Yunjian"
+                "workflow": "runninghub/tts_edge.json",
+                "ref_audio": None
             }
         }