Update

app.py

@@ -34,6 +34,16 @@ def evaluate_submission(file):
     Evaluate the submitted CSV file by comparing predicted bounding box coordinates and food weight
     against the ground truth.
     """
+    if file is None:
+        return "❌ Please upload a file."
+    
+    print("File received:", file)
+    try:
+        submission_df = pd.read_csv(file.name)
+        print("Submission shape:", submission_df.shape)
+    except Exception as e:
+        return f"❌ File read failed: {e}"
+    
     # Load hidden ground truth CSV.
     try:
         gt_df = pd.read_csv("/Users/aibota/Downloads/ground_truth.csv")