[Bug]: Clicking the upper part of a horizontal tab does not switch tabs

Description

When the tab strip is horizontal, clicking on the upper part of a tab does not switch to that tab. Clicks in that area appear to have no effect, while clicking the lower part of the same tab works as expected.

This may be caused by the top region of the tab strip being treated as a window drag region, so the click is swallowed instead of activating the tab.

Steps to reproduce

1. Open ego lite with a horizontal tab bar.
2. Have at least two tabs open.
3. Click on the upper part of an inactive tab (near the top edge of the tab).
4. Observe that the tab is not switched.

Expected behavior

Clicking anywhere inside a tab should switch to that tab.

Actual behavior

Clicking the upper part of the tab has no effect. Only clicking the lower part switches the tab.

Environment

• ego lite: 0.5.0.32 (chromium 152.0.7977.54, node v24.18.1)
• OS: macOS 26.3 (arm64, build 25D125)