- Add Save Changes button at top of form so users don't scroll to the
bottom to save; existing meetings only (mirrors v1 behaviour)
- Collapse Contact 2 subsection behind a toggle; auto-expands when the
meeting already has Contact 2 data saved
- Add hidden inputs when Contact 2 is collapsed so FormData preserves
existing contact info rather than overwriting with nulls on save
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>