Update app.py

app.py

@@ -296,6 +296,8 @@ def generate_windows_from_selection(selected_indices, window_size, window_type):
     """Generate windows from selected residue indices"""
     if len(selected_indices) < window_size:
         return []
+    if len(selected_indices) == window_size:
+        return selected_indices
     
     windows = []
     if window_type == "contiguous":