Summary

Fixes a crash in the virtualized tree view caused by stale DOM node references. Uses keyed directive to force lit-virtualizer re-creation when the underlying tree model changes.

Impact

• Prevents crashes when navigating tree views
• Improves stability of virtualized tree rendering

Validation

• Verify tree views render correctly without crashes
• Verify tree model changes properly trigger re-renders

Risk

Low - Bug fix with targeted scope

Issue created retroactively via commit audit