Update app.py

app.py

@@ -5,7 +5,7 @@ from fairseq.models.transformer import TransformerModel
 
 # ── Load model once at startup ──────────────────────────────────────────────
 model = TransformerModel.from_pretrained(
-    model_dir=".",
+    model_name_or_path=".",
     checkpoint_file="fairseq_3lkh_best.pt",
     data_name_or_path=".",        # looks for dict.en.txt / dict.ne.txt here
     task="translation_multi_simple_epoch",