The store() method used column names that don't exist in the database:
- rounds_count → rounds_total + swiss_rounds
- entry_fee → entry_fee_coins
- prize_pool → prize_pool_coins
- start_date → starts_at
- organization_id → org_id
- swiss_org_id, swiss_event_id → removed (don't exist in table)
- created_by → removed (UUID FK to profiles, admin users aren't in profiles)

Also:
- Time control is now a proper dropdown with all 14 enum values grouped
  by category (bullet/blitz/rapid/classical)
- Format dropdown now uses correct enum values (swiss_to_bracket, team_battle
  instead of invalid group_stage)
- Swiss API tournament creation limited to formats it actually supports
  (swiss, round_robin) — other formats use local bracket/arena engines
- Insert failure now shows error instead of fake success message
- On success, redirects to the new tournament page instead of list
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>