Fix stale element hit-testing cache causing selection to feel stuck

[aidenybai]

What

Fixes hover/selection box not appearing in activation mode on pages that block pointermove events in the bubbling phase.

Why

Some sites attach pointermove listeners that call stopImmediatePropagation() (bubble). Our pointermove listener was registered without capture, so handlePointerMove never ran → detectedElement stayed null → selection box never appeared.

How

• Register the pointermove listener in capture phase (capture: true).
• Add a Playwright regression test that installs a bubbling-phase pointermove blocker and asserts the selection box still appears.

Tests

• pnpm --filter react-grab test
• pnpm test

  

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Summary by cubic

Fix hit-testing cache returning stale elements and restore hover selection when pages block pointermove. getElementAtPosition now reuses cache only when the pointer is close and within the throttle window, and we listen to pointermove in capture phase to avoid bubbling blocks.

^{Written for commit 9675cc2. Summary will update on new commits.}

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Project	Deployment	Actions	Updated (UTC)
gym	Ready	Preview, Comment	Apr 9, 2026 1:23am
react-grab-website	Ready	Preview, Comment	Apr 9, 2026 1:23am

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commit: 9675cc2