Backend:
- Fixed track endpoint duplicate key error with proper rollback
- Returns domain_id for already tracked domains
Frontend DropsTab:
- Added trackedDrops state to show "Tracked" status
- Track button shows checkmark when already in watchlist
- Status button shows "In Transition" with countdown
AnalyzePanel:
- Added dropStatus to store for passing drop info
- Shows Drop Status banner with availability
- "Buy Now" button for available domains in panel