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feat: implement trade window UI with item slots and gold offering

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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
This commit is contained in:
Kelsi 2026-03-11 00:44:07 -07:00
parent 7c5d688c00
commit 06facc0060
6 changed files with 337 additions and 5 deletions
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include/ui/game_screen.hpp
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@ -224,6 +224,7 @@ private:
void renderDuelRequestPopup(game::GameHandler& gameHandler);
void renderLootRollPopup(game::GameHandler& gameHandler);
void renderTradeRequestPopup(game::GameHandler& gameHandler);
void renderTradeWindow(game::GameHandler& gameHandler);
void renderSummonRequestPopup(game::GameHandler& gameHandler);
void renderSharedQuestPopup(game::GameHandler& gameHandler);
void renderItemTextWindow(game::GameHandler& gameHandler);