Directory picker skips the last suggestion when Up is pressed initially

Description

In the directory picker autocomplete, pressing Up before any suggestion is active selects the penultimate result. This makes reverse keyboard navigation skip the last suggestion on the first key press.

Steps to reproduce

1. Open the directory picker in the web or desktop app.
2. Type a path or search term that produces at least three autocomplete suggestions.
3. Leave the suggestions unselected.
4. Press Up once.

Observed behavior

The penultimate suggestion becomes active.

Expected behavior

The last suggestion should become active so reverse navigation wraps from the unselected state to the end of the list.

Additional context

Down correctly starts at the first suggestion. Up should mirror that behavior from the opposite end. The issue is independent of the operating system and terminal because it occurs in the picker index calculation.