Fix Menu's Appearing Behind Home Content

[PauloMFJ]

Overview

Implemented Portal element to fix open Menu showing behind home content.

Fixed focus events in InFrontOfCanvas getting consumed by tldraw. To do so implemented new capture config option on useKeyDown.

Re-ordered zoom options:

Tickets:

[gemini-code-assist]

Code Review

This pull request introduces a new Portal primitive to lift canvas elements above tldraw's stacking context, refactors the Menu component, and updates the useFocusTrap and useKeydown hooks to improve keyboard navigation. Key feedback includes: avoiding a global capture-phase listener in useKeydown to prevent breaking event propagation, optimizing the Portal component to prevent DOM recreation and state loss on className changes, retaining the focus trap in the Menu component for accessibility, and refining the tabbable elements selector in useFocusTrap to support all non-negative tab indices.