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06facc0060
Previously trade only showed an accept/decline popup with no way to actually offer items or gold. This commit adds the complete trade flow: Packets: - CMSG_SET_TRADE_ITEM (tradeSlot, bag, bagSlot) — add item to slot - CMSG_CLEAR_TRADE_ITEM (tradeSlot) — remove item from slot - CMSG_SET_TRADE_GOLD (uint64 copper) — set gold offered - CMSG_UNACCEPT_TRADE — unaccept without cancelling - SMSG_TRADE_STATUS_EXTENDED parser — updates trade slot/gold state State: - TradeSlot struct: itemId, displayId, stackCount, bag, bagSlot - myTradeSlots_/peerTradeSlots_ arrays (6 slots each) - myTradeGold_/peerTradeGold_ (copper) - resetTradeState() helper clears all state on cancel/complete/close UI (renderTradeWindow): - Two-column layout: my offer | peer offer - Each column shows 6 item slots with item names - Double-click own slot to remove; right-click empty slot to open backpack picker popup - Gold input field (copper, Enter to set) - Accept Trade / Cancel buttons - Window close button triggers cancel trade