Add quest details dialog, fix vendor UI, suppress both-button clicks

Parse SMSG_QUESTGIVER_QUEST_DETAILS and show quest text with Accept/
Decline buttons. Vendor window now shows item names with quality colors,
stat tooltips on hover, player money, and closes properly via X button.
Suppress left/right-click targeting and interaction when the other mouse
button is held (both-button run forward).

src/game/game_handler.cpp

@@ -1092,6 +1092,8 @@ void GameHandler::handlePacket(network::Packet& packet) {
         case Opcode::MSG_RAID_TARGET_UPDATE:
         case Opcode::SMSG_QUESTGIVER_STATUS:
         case Opcode::SMSG_QUESTGIVER_QUEST_DETAILS:
+            handleQuestDetails(packet);
+            break;
         case Opcode::SMSG_QUESTGIVER_REQUEST_ITEMS:
         case Opcode::SMSG_QUESTGIVER_OFFER_REWARD:
         case Opcode::SMSG_QUESTGIVER_QUEST_COMPLETE:
@@ -3538,6 +3540,31 @@ void GameHandler::selectGossipQuest(uint32_t questId) {
     gossipWindowOpen = false;
 }
 
+void GameHandler::handleQuestDetails(network::Packet& packet) {
+    QuestDetailsData data;
+    if (!QuestDetailsParser::parse(packet, data)) {
+        LOG_WARNING("Failed to parse SMSG_QUESTGIVER_QUEST_DETAILS");
+        return;
+    }
+    currentQuestDetails = data;
+    questDetailsOpen = true;
+    gossipWindowOpen = false;
+}
+
+void GameHandler::acceptQuest() {
+    if (!questDetailsOpen || state != WorldState::IN_WORLD || !socket) return;
+    auto packet = QuestgiverAcceptQuestPacket::build(
+        currentQuestDetails.npcGuid, currentQuestDetails.questId);
+    socket->send(packet);
+    questDetailsOpen = false;
+    currentQuestDetails = QuestDetailsData{};
+}
+
+void GameHandler::declineQuest() {
+    questDetailsOpen = false;
+    currentQuestDetails = QuestDetailsData{};
+}
+
 void GameHandler::closeGossip() {
     gossipWindowOpen = false;
     currentGossip = GossipMessageData{};
@@ -3549,6 +3576,11 @@ void GameHandler::openVendor(uint64_t npcGuid) {
     socket->send(packet);
 }
 
+void GameHandler::closeVendor() {
+    vendorWindowOpen = false;
+    currentVendorItems = ListInventoryData{};
+}
+
 void GameHandler::buyItem(uint64_t vendorGuid, uint32_t itemId, uint32_t slot, uint8_t count) {
     if (state != WorldState::IN_WORLD || !socket) return;
     auto packet = BuyItemPacket::build(vendorGuid, itemId, slot, count);
@@ -3605,6 +3637,11 @@ void GameHandler::handleListInventory(network::Packet& packet) {
     if (!ListInventoryParser::parse(packet, currentVendorItems)) return;
     vendorWindowOpen = true;
     gossipWindowOpen = false; // Close gossip if vendor opens
+
+    // Query item info for all vendor items so we can show names
+    for (const auto& item : currentVendorItems.items) {
+        queryItemInfo(item.itemId, 0);
+    }
 }
 
 // ============================================================

src/game/world_packets.cpp

@@ -1835,6 +1835,44 @@ network::Packet QuestgiverAcceptQuestPacket::build(uint64_t npcGuid, uint32_t qu
     return packet;
 }
 
+bool QuestDetailsParser::parse(network::Packet& packet, QuestDetailsData& data) {
+    if (packet.getSize() < 20) return false;
+    data.npcGuid = packet.readUInt64();
+    /*informUnit*/ packet.readUInt64();
+    data.questId = packet.readUInt32();
+    data.title = packet.readString();
+    data.details = packet.readString();
+    data.objectives = packet.readString();
+    /*activateAccept*/ packet.readUInt8();
+    /*flags*/ packet.readUInt32();
+    data.suggestedPlayers = packet.readUInt32();
+    /*isFinished*/ packet.readUInt8();
+
+    // Reward choice items
+    uint32_t choiceCount = packet.readUInt32();
+    for (uint32_t i = 0; i < choiceCount && i < 6; i++) {
+        packet.readUInt32(); // itemId
+        packet.readUInt32(); // count
+        packet.readUInt32(); // displayInfo
+    }
+
+    // Reward items
+    uint32_t rewardCount = packet.readUInt32();
+    for (uint32_t i = 0; i < rewardCount && i < 4; i++) {
+        packet.readUInt32(); // itemId
+        packet.readUInt32(); // count
+        packet.readUInt32(); // displayInfo
+    }
+
+    data.rewardMoney = packet.readUInt32();
+    if (packet.getReadPos() < packet.getSize()) {
+        data.rewardXp = packet.readUInt32();
+    }
+
+    LOG_INFO("Quest details: id=", data.questId, " title='", data.title, "'");
+    return true;
+}
+
 bool GossipMessageParser::parse(network::Packet& packet, GossipMessageData& data) {
     data.npcGuid = packet.readUInt64();
     data.menuId = packet.readUInt32();