Add debug listing to download endpoint

app.py

@@ -356,7 +356,20 @@ async def download_result(path: str = Query(...)):
         return JSONResponse({"error": "forbidden path"}, status_code=403)
 
     if not os.path.isfile(path):
-        return JSONResponse({"error": "file not found"}, status_code=404)
+        existing = glob.glob("/tmp/musetalk_*")
+        files_in_dirs = []
+
+        for d in existing:
+            if os.path.isdir(d):
+                for f in os.listdir(d):
+                    files_in_dirs.append(os.path.join(d, f))
+
+        return JSONResponse({
+            "error": "file not found",
+            "requested": path,
+            "musetalk_dirs": existing[:10],
+            "files_in_dirs": files_in_dirs[:20],
+        }, status_code=404)
 
     return FileResponse(path, media_type="video/mp4", filename=os.path.basename(path))