Update app.py

app.py

@@ -107,6 +107,8 @@ import base64
 import logging
 from typing import Optional
 import uuid
+from typing import Optional, ClassVar, List
+
 
 # Set up logging
 logging.basicConfig(level=logging.INFO)
@@ -115,11 +117,11 @@ logger = logging.getLogger(__name__)
 class TextImageRequest(BaseModel):
     text: Optional[str] = None
     image_base64: Optional[str] = None
-    voice: str = "af_heart"  # Default voice that we know exists
+    voice: str = "af_heart"  # Default voice
     speed: float = 1.0
 
-    # List of known available voices - update this based on what's actually available
-    AVAILABLE_VOICES = ["af_heart"]  # Add more voices as they become available
+    # Annotate as ClassVar to indicate this is not a model field.
+    AVAILABLE_VOICES: ClassVar[List[str]] = ["af_heart"]
 
     def validate_voice(self):
         if self.voice not in self.AVAILABLE_VOICES: