"Interactive Zoom" aspect ratio should match the window dimensions rather than the video file dimensions to maximize viewable area.

The viewable area when zoomed in using the "Interactive Zoom" feature is restricted to the area taken up by the video file when not zoomed in regardless of whether there is extra vertical or horizontal space that could be used to display more of the video. Ideally, as you zoom in, any vertical bars or horizontal bars go away and the entire VLC window is filled with video content.

To Reproduce: Open a vertical video file, (one with a 9:16 aspect ratio for example) and ensure your vlc window is wide enough so that you have horizontal black bars on either side of the playing video (16:9 aspect ratio is good for this). Then enable the interactive zoom feature. Notice how the little white rectangle representing the viewable area is shaped like the original video file (same aspect ratio) rather than being shaped like the 16:9 window you have open. As you zoom in, the video could have filled the entire VLC window, but it stays within the original video dimensions instead.

The feature being requested here is that the little white rectangle is shaped like (same aspect ratio) the entire viewable window to the extent possible rather than being shaped like the original video file. This would allow zoomed videos to take advantage of all the space available and would maximize the amount of video shown at any given video and window dimensions while zooming.