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In order to show developers how to intercept tldraw's Tab-based shape navigation and redirect focus to custom UI, this PR adds a new example demonstrating a focus trap pattern with a contextual toolbar. The example registers a capture-phase `keydown` listener in `onMount` that intercepts Tab before tldraw's own handler, redirecting focus between the canvas and a contextual toolbar. It also handles Shift+Tab cycling and Escape to return focus to the canvas. Relates to #2549 ### Change type - [x] `other` ### Test plan 1. Open the "Escape shape focus trap" example 2. Click on the geo shape to select it 3. Press Tab — focus should move to the first toolbar button (Duplicate) 4. Press Tab again — focus moves to the Delete button 5. Press Tab again — focus returns to the canvas 6. Press Shift+Tab to cycle backwards through toolbar buttons 7. Press Escape while focused in the toolbar — focus returns to the canvas ### Release notes - Add example showing how to intercept Tab navigation to focus a custom contextual toolbar ### Code changes | Section | LOC change | | ------------- | ---------- | | Documentation | +220 / -0 | <!-- CURSOR_SUMMARY --> --- > [!NOTE] > **Low Risk** > Low risk: adds a self-contained UI example and docs demonstrating keyboard focus handling without changing core library behavior. > > **Overview** > Adds a new `escape-shape-focus-trap` UI example that renders a contextual toolbar for selected shapes and uses a capture-phase `keydown` listener to override tldraw’s Tab-based shape navigation. > > The example demonstrates trapping `Tab`/`Shift+Tab` within toolbar buttons, restoring focus back to the canvas at the ends of the cycle, and handling `Escape` to return focus, with accompanying README guidance. > > <sup>Written by [Cursor Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit af19804. This will update automatically on new commits. Configure [here](https://cursor.com/dashboard?tab=bugbot).</sup> <!-- /CURSOR_SUMMARY -->
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