Hover tooltip doc window z-index bug

[rewinfrey]

Describe the bug

When viewing code documentation in UCM desktop version 1.0.0 (UCM.Desktop_1.0.0_aarch64.dmg), the modal doc window displays behind the proceeding block:

To Reproduce
Steps to reproduce the behavior:

1. Start the ucm command line (UCM_TOKEN=codebase UCM_PORT=5858 ucm --allow-cors-host tauri://localhost)
2. In ucm execute: project.create quickstart
3. In ucm-desktop select the quickstart project from the projects dropdown
4. Select two or more code docs for viewing, e.g. Left.doc and Either.bitmap
5. While on the Code tab, hover over a keyword like if or then in the top-most code doc block

Expected behavior
Z-index should not cause the modal to render behind the lower code block.

Environment (please complete the following information):

• OS: macOS
• UCM Desktop version: 1.0.0 aarch64
• UCM Version: release/0.5.34

Additional context
Lovely experience so far, this is very minor and likely already known but I did not see an issue describing this yet. Thanks for making ucm-desktop 🙇