- Replace gap-1.5 (6px) with gap-2 (8px) in signer row
- Replace padding 6px 8px with py-1 px-2 (4px/8px) in signer row
- Raise touch target exception from 28px to 32px, name override as touch-target-compact-remove with rationale
- Rename "Add" button to "Add Signer" (verb+noun CTA per Dimension 1)
Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
