Split StammbaumCard from 366 to 196 lines by extracting:
- RelationshipChip.svelte — single relationship list item with optional delete
- AddRelationshipForm.svelte — self-contained add-relationship form with open/close state
Both components have browser-mode spec tests covering rendering and interaction.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
