Handle SMSG_QUEST_CONFIRM_ACCEPT (shared quest) with accept/decline popup

- Parse SMSG_QUEST_CONFIRM_ACCEPT (questId + title + sharerGuid),
  show chat notification with quest title and sharer name
- acceptSharedQuest() sends CMSG_QUEST_CONFIRM_ACCEPT with questId
- renderSharedQuestPopup(): shows sharer name, gold quest title,
  Accept/Decline buttons (stacked below other social popups)

include/game/game_handler.hpp

@@ -707,6 +707,14 @@ public:
     bool hasPendingGroupInvite() const { return pendingGroupInvite; }
     const std::string& getPendingInviterName() const { return pendingInviterName; }
 
+    // ---- Shared Quest ----
+    bool hasPendingSharedQuest() const { return pendingSharedQuest_; }
+    uint32_t getSharedQuestId() const { return sharedQuestId_; }
+    const std::string& getSharedQuestTitle() const { return sharedQuestTitle_; }
+    const std::string& getSharedQuestSharerName() const { return sharedQuestSharerName_; }
+    void acceptSharedQuest();
+    void declineSharedQuest();
+
     // ---- Summon ----
     bool hasPendingSummonRequest() const { return pendingSummonRequest_; }
     const std::string& getSummonerName() const { return summonerName_; }
@@ -1295,6 +1303,7 @@ private:
 
     // ---- Instance lockout handler ----
     void handleRaidInstanceInfo(network::Packet& packet);
+    void handleQuestConfirmAccept(network::Packet& packet);
     void handleSummonRequest(network::Packet& packet);
     void handleTradeStatus(network::Packet& packet);
     void handleDuelRequested(network::Packet& packet);
@@ -1654,6 +1663,13 @@ private:
     bool pendingGroupInvite = false;
     std::string pendingInviterName;
 
+    // Shared quest state
+    bool        pendingSharedQuest_       = false;
+    uint32_t    sharedQuestId_            = 0;
+    std::string sharedQuestTitle_;
+    std::string sharedQuestSharerName_;
+    uint64_t    sharedQuestSharerGuid_    = 0;
+
     // Summon state
     bool        pendingSummonRequest_ = false;
     uint64_t    summonerGuid_         = 0;

include/ui/game_screen.hpp

@@ -208,6 +208,7 @@ private:
     void renderLootRollPopup(game::GameHandler& gameHandler);
     void renderTradeRequestPopup(game::GameHandler& gameHandler);
     void renderSummonRequestPopup(game::GameHandler& gameHandler);
+    void renderSharedQuestPopup(game::GameHandler& gameHandler);
     void renderBuffBar(game::GameHandler& gameHandler);
     void renderLootWindow(game::GameHandler& gameHandler);
     void renderGossipWindow(game::GameHandler& gameHandler);

src/game/game_handler.cpp

@@ -1994,6 +1994,9 @@ void GameHandler::handlePacket(network::Packet& packet) {
         case Opcode::SMSG_LOOT_REMOVED:
             handleLootRemoved(packet);
             break;
+        case Opcode::SMSG_QUEST_CONFIRM_ACCEPT:
+            handleQuestConfirmAccept(packet);
+            break;
         case Opcode::SMSG_SUMMON_REQUEST:
             handleSummonRequest(packet);
             break;
@@ -15043,6 +15046,54 @@ void GameHandler::handleAuctionCommandResult(network::Packet& packet) {
              " error=", result.errorCode);
 }
 
+// ---------------------------------------------------------------------------
+// SMSG_QUEST_CONFIRM_ACCEPT (shared quest from group member)
+//   uint32 questId + string questTitle + uint64 sharerGuid
+// ---------------------------------------------------------------------------
+
+void GameHandler::handleQuestConfirmAccept(network::Packet& packet) {
+    size_t rem = packet.getSize() - packet.getReadPos();
+    if (rem < 4) return;
+
+    sharedQuestId_    = packet.readUInt32();
+    sharedQuestTitle_ = packet.readString();
+    if (packet.getSize() - packet.getReadPos() >= 8) {
+        sharedQuestSharerGuid_ = packet.readUInt64();
+    }
+
+    sharedQuestSharerName_.clear();
+    auto entity = entityManager.getEntity(sharedQuestSharerGuid_);
+    if (auto* unit = dynamic_cast<Unit*>(entity.get())) {
+        sharedQuestSharerName_ = unit->getName();
+    }
+    if (sharedQuestSharerName_.empty()) {
+        char tmp[32];
+        std::snprintf(tmp, sizeof(tmp), "0x%llX",
+                      static_cast<unsigned long long>(sharedQuestSharerGuid_));
+        sharedQuestSharerName_ = tmp;
+    }
+
+    pendingSharedQuest_ = true;
+    addSystemChatMessage(sharedQuestSharerName_ + " has shared the quest \"" +
+                         sharedQuestTitle_ + "\" with you.");
+    LOG_INFO("SMSG_QUEST_CONFIRM_ACCEPT: questId=", sharedQuestId_,
+             " title=", sharedQuestTitle_, " sharer=", sharedQuestSharerName_);
+}
+
+void GameHandler::acceptSharedQuest() {
+    if (!pendingSharedQuest_ || !socket) return;
+    pendingSharedQuest_ = false;
+    network::Packet pkt(wireOpcode(Opcode::CMSG_QUEST_CONFIRM_ACCEPT));
+    pkt.writeUInt32(sharedQuestId_);
+    socket->send(pkt);
+    addSystemChatMessage("Accepted: " + sharedQuestTitle_);
+}
+
+void GameHandler::declineSharedQuest() {
+    pendingSharedQuest_ = false;
+    // No response packet needed — just dismiss the UI
+}
+
 // ---------------------------------------------------------------------------
 // SMSG_SUMMON_REQUEST
 //   uint64 summonerGuid + uint32 zoneId + uint32 timeoutMs

src/ui/game_screen.cpp

@@ -400,6 +400,7 @@ void GameScreen::render(game::GameHandler& gameHandler) {
     renderLootRollPopup(gameHandler);
     renderTradeRequestPopup(gameHandler);
     renderSummonRequestPopup(gameHandler);
+    renderSharedQuestPopup(gameHandler);
     renderGuildInvitePopup(gameHandler);
     renderGuildRoster(gameHandler);
     renderBuffBar(gameHandler);
@@ -4404,6 +4405,31 @@ void GameScreen::renderDuelRequestPopup(game::GameHandler& gameHandler) {
     ImGui::End();
 }
 
+void GameScreen::renderSharedQuestPopup(game::GameHandler& gameHandler) {
+    if (!gameHandler.hasPendingSharedQuest()) return;
+
+    auto* window = core::Application::getInstance().getWindow();
+    float screenW = window ? static_cast<float>(window->getWidth()) : 1280.0f;
+
+    ImGui::SetNextWindowPos(ImVec2(screenW / 2 - 175, 490), ImGuiCond_Always);
+    ImGui::SetNextWindowSize(ImVec2(350, 0), ImGuiCond_Always);
+
+    if (ImGui::Begin("Shared Quest", nullptr, ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoResize)) {
+        ImGui::Text("%s has shared a quest with you:", gameHandler.getSharedQuestSharerName().c_str());
+        ImGui::TextColored(ImVec4(1.0f, 0.85f, 0.0f, 1.0f), "\"%s\"", gameHandler.getSharedQuestTitle().c_str());
+        ImGui::Spacing();
+
+        if (ImGui::Button("Accept", ImVec2(130, 30))) {
+            gameHandler.acceptSharedQuest();
+        }
+        ImGui::SameLine();
+        if (ImGui::Button("Decline", ImVec2(130, 30))) {
+            gameHandler.declineSharedQuest();
+        }
+    }
+    ImGui::End();
+}
+
 void GameScreen::renderSummonRequestPopup(game::GameHandler& gameHandler) {
     if (!gameHandler.hasPendingSummonRequest()) return;