'Delete' does not reflect 'FileContentsManager.delete_to_trash'

Notebooks will "delete" non-empty directories if `FileContentsManager.delete_to_trash` is set `True` - though it actually just copies them to `.local/share/Trash`.

However, the message in the confirmation still says "Are you sure you want to permanently delete" - the word "permanently" is misleading in this context.

The message should check the state of the `delete_to_trash` flag, and be worded appropriately


Locate the notebook delete confirmation UI and trace how it can access FileContentsManager.delete_to_trash. Check the wording for both flag states, then update it so the confirmation accurately distinguishes trashing from permanent deletion. Done means the message no longer says “permanently” when delete_to_trash is enabled.

Written by the indexing model from the issue text.