- Step 2 now shows member vs non-member toggle + membership_id field
- Price resolution checks base_prices.metadata->membership_type first,
  falls back to generic price if no membership-specific price exists
- Membership type saved to participant record
- Review step shows membership status
- Computed property selectedProgramFee updates live when membership changes
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>