Bug Report: Top and bottom gaps are missing in vertical maximization tiling

I’ve noticed an issue with how gaps are rendered when using specific tiling layouts. Specifically, the top and bottom gaps disappear when a window is tiled using vertical maximization (half-screen left or right). However, the gaps work perfectly fine when using quarter-tiling (windows placed in corners).

Steps to Reproduce:

1. Open any application window.

2. Tile the window to the left or right side of the screen to achieve vertical maximization (taking up half the screen vertically).

3. Observe the spacing at the top and bottom of the window.

Actual Behavior:
The window touches the top and bottom edges of the screen (or the panel/dock area), ignoring the configured gap settings for those sides.

Expected Behavior:
The window should maintain the defined gaps at the top and bottom, consistent with how they appear in quarter-tiling mode.

System Info:

• Distro Ubuntu 26.04
• GNOME Shell version: 50
• Extension version: gnome-shell-ubuntu-extensions/resolute,now 50.26.04.7ubuntu
• Wayland

Reproduce the issue by applying the configured gaps to a window tiled left or right, then compare that behavior with quarter-tiling. Locate the tiling logic for vertical maximization and trace how top and bottom gaps are calculated; done means those gaps remain visible in both layouts without breaking the existing quarter-tiling behavior.