Summary

• Dismiss code review and plan annotation toolbars when clicking outside or pressing Escape.
• Consolidate dismissal behavior into a shared hook.

Changes

• Add useDismissOnOutsideAndEscape in UI hooks.
• Use the hook in review diff toolbar and plan annotation toolbar.
• Ensure Escape works even when the textarea is not focused (review).

Testing

• Manual: review UI (http://localhost:3001) line selection → outside click + Escape dismiss.
• Manual: plan UI (http://localhost:3002) text selection → outside click dismiss.