- Add p2p_platform_escrow table for tracking locked funds
- Implement accept_p2p_offer() with FOR UPDATE lock to prevent race conditions
- Add complete_p2p_trade() and cancel_p2p_trade() atomic functions
- Configure platform escrow wallet: 5DFwqK698vL4gXHEcanaewnAqhxJ2rjhAogpSTHw3iwGDwd3
- Update AdList to show user's own offers with Your Ad badge
- Remove unused getActiveOffers import (ESLint fix)