Update app.py

app.py

@@ -570,9 +570,14 @@ async def gensfx(request: Request, prompt: str = None):
     async with httpx.AsyncClient(timeout=None) as client:
         response = await client.get(url)
     if response.status_code != 200:
-        raise HTTPException(
+        return JSONResponse(
             status_code=response.status_code,
-            detail="Upstream video HEAD failed"
+            content={
+                "success": False,
+                "error": "Upstream audio generation failed",
+                "status_code": response.status_code,
+                "message": body_text[:1000]
+            }
         )
     return Response(
         response.content,