feat: implement master loot UI for SMSG_LOOT_MASTER_LIST

Parse master loot candidate GUIDs from SMSG_LOOT_MASTER_LIST and display
a "Give to..." popup menu on item click when master loot is active.
Sends CMSG_LOOT_MASTER_GIVE with loot GUID, slot, and target GUID.
Clears candidates when loot window is closed.

include/game/game_handler.hpp

@@ -1230,6 +1230,11 @@ public:
     void setAutoLoot(bool enabled) { autoLoot_ = enabled; }
     bool isAutoLoot() const { return autoLoot_; }
 
+    // Master loot candidates (from SMSG_LOOT_MASTER_LIST)
+    const std::vector<uint64_t>& getMasterLootCandidates() const { return masterLootCandidates_; }
+    bool hasMasterLootCandidates() const { return !masterLootCandidates_.empty(); }
+    void lootMasterGive(uint8_t lootSlot, uint64_t targetGuid);
+
     // Group loot roll
     struct LootRollEntry {
         uint64_t objectGuid    = 0;
@@ -2493,6 +2498,7 @@ private:
     bool lootWindowOpen = false;
     bool autoLoot_ = false;
     LootResponseData currentLoot;
+    std::vector<uint64_t> masterLootCandidates_;  // from SMSG_LOOT_MASTER_LIST
 
     // Group loot roll state
     bool          pendingLootRollActive_ = false;

src/game/game_handler.cpp

@@ -3342,10 +3342,19 @@ void GameHandler::handlePacket(network::Packet& packet) {
         case Opcode::SMSG_LOOT_ROLL_WON:
             handleLootRollWon(packet);
             break;
-        case Opcode::SMSG_LOOT_MASTER_LIST:
-            // Master looter list — no UI yet; consume to avoid unhandled warning.
-            packet.setReadPos(packet.getSize());
+        case Opcode::SMSG_LOOT_MASTER_LIST: {
+            // uint8 count + count * uint64 guid — eligible recipients for master looter
+            masterLootCandidates_.clear();
+            if (packet.getSize() - packet.getReadPos() < 1) break;
+            uint8_t mlCount = packet.readUInt8();
+            masterLootCandidates_.reserve(mlCount);
+            for (uint8_t i = 0; i < mlCount; ++i) {
+                if (packet.getSize() - packet.getReadPos() < 8) break;
+                masterLootCandidates_.push_back(packet.readUInt64());
+            }
+            LOG_INFO("SMSG_LOOT_MASTER_LIST: ", (int)masterLootCandidates_.size(), " candidates");
             break;
+        }
         case Opcode::SMSG_GOSSIP_MESSAGE:
             handleGossipMessage(packet);
             break;
@@ -15585,6 +15594,7 @@ void GameHandler::lootItem(uint8_t slotIndex) {
 void GameHandler::closeLoot() {
     if (!lootWindowOpen) return;
     lootWindowOpen = false;
+    masterLootCandidates_.clear();
     if (currentLoot.lootGuid != 0 && targetGuid == currentLoot.lootGuid) {
         clearTarget();
     }
@@ -15595,6 +15605,16 @@ void GameHandler::closeLoot() {
     currentLoot = LootResponseData{};
 }
 
+void GameHandler::lootMasterGive(uint8_t lootSlot, uint64_t targetGuid) {
+    if (state != WorldState::IN_WORLD || !socket) return;
+    // CMSG_LOOT_MASTER_GIVE: uint64 lootGuid + uint8 slotIndex + uint64 targetGuid
+    network::Packet pkt(wireOpcode(Opcode::CMSG_LOOT_MASTER_GIVE));
+    pkt.writeUInt64(currentLoot.lootGuid);
+    pkt.writeUInt8(lootSlot);
+    pkt.writeUInt64(targetGuid);
+    socket->send(pkt);
+}
+
 void GameHandler::interactWithNpc(uint64_t guid) {
     if (state != WorldState::IN_WORLD || !socket) return;
     auto packet = GossipHelloPacket::build(guid);

src/ui/game_screen.cpp

@@ -12164,7 +12164,43 @@ void GameScreen::renderLootWindow(game::GameHandler& gameHandler) {
 
         // Process deferred loot pickup (after loop to avoid iterator invalidation)
         if (lootSlotClicked >= 0) {
-            gameHandler.lootItem(static_cast<uint8_t>(lootSlotClicked));
+            if (gameHandler.hasMasterLootCandidates()) {
+                // Master looter: open popup to choose recipient
+                char popupId[32];
+                snprintf(popupId, sizeof(popupId), "##MLGive%d", lootSlotClicked);
+                ImGui::OpenPopup(popupId);
+            } else {
+                gameHandler.lootItem(static_cast<uint8_t>(lootSlotClicked));
+            }
+        }
+
+        // Master loot "Give to" popups
+        if (gameHandler.hasMasterLootCandidates()) {
+            for (const auto& item : loot.items) {
+                char popupId[32];
+                snprintf(popupId, sizeof(popupId), "##MLGive%d", item.slotIndex);
+                if (ImGui::BeginPopup(popupId)) {
+                    ImGui::TextDisabled("Give to:");
+                    ImGui::Separator();
+                    const auto& candidates = gameHandler.getMasterLootCandidates();
+                    for (uint64_t candidateGuid : candidates) {
+                        auto entity = gameHandler.getEntityManager().getEntity(candidateGuid);
+                        auto* unit = entity ? dynamic_cast<game::Unit*>(entity.get()) : nullptr;
+                        const char* cName = unit ? unit->getName().c_str() : nullptr;
+                        char nameBuf[64];
+                        if (!cName || cName[0] == '\0') {
+                            snprintf(nameBuf, sizeof(nameBuf), "Player 0x%llx",
+                                     static_cast<unsigned long long>(candidateGuid));
+                            cName = nameBuf;
+                        }
+                        if (ImGui::MenuItem(cName)) {
+                            gameHandler.lootMasterGive(item.slotIndex, candidateGuid);
+                            ImGui::CloseCurrentPopup();
+                        }
+                    }
+                    ImGui::EndPopup();
+                }
+            }
         }
 
         if (loot.items.empty() && loot.gold == 0) {