feat: implement barber shop UI with hair/facial customization

Adds a functional barber shop window triggered by SMSG_ENABLE_BARBER_SHOP.
Players can adjust hair style, hair color, and facial features using
sliders bounded by race/gender max values. Sends CMSG_ALTER_APPEARANCE
on confirm; server result closes the window on success. Escape key
also closes the barber shop.

include/game/game_handler.hpp

@@ -1219,6 +1219,12 @@ public:
     uint32_t getPetUnlearnCost() const { return petUnlearnCost_; }
     void confirmPetUnlearn();
     void cancelPetUnlearn() { petUnlearnPending_ = false; }
+
+    // Barber shop
+    bool isBarberShopOpen() const { return barberShopOpen_; }
+    void closeBarberShop() { barberShopOpen_ = false; }
+    void sendAlterAppearance(uint32_t hairStyle, uint32_t hairColor, uint32_t facialHair);
+
     /** True when ghost is within 40 yards of corpse position (same map). */
     bool canReclaimCorpse() const;
     /** Seconds remaining on the PvP corpse-reclaim delay, or 0 if the reclaim is available now. */
@@ -2983,6 +2989,9 @@ private:
     uint64_t activeCharacterGuid_ = 0;
     Race playerRace_ = Race::HUMAN;
 
+    // Barber shop
+    bool barberShopOpen_ = false;
+
     // ---- Phase 5: Loot ----
     bool lootWindowOpen = false;
     bool autoLoot_ = false;

include/game/world_packets.hpp

@@ -2796,5 +2796,12 @@ public:
     static network::Packet build(int32_t titleBit);
 };
 
+/** CMSG_ALTER_APPEARANCE – barber shop: change hair style, color, facial hair.
+ *  Payload: uint32 hairStyle, uint32 hairColor, uint32 facialHair. */
+class AlterAppearancePacket {
+public:
+    static network::Packet build(uint32_t hairStyle, uint32_t hairColor, uint32_t facialHair);
+};
+
 } // namespace game
 } // namespace wowee

include/ui/game_screen.hpp

@@ -366,6 +366,7 @@ private:
     void renderQuestOfferRewardWindow(game::GameHandler& gameHandler);
     void renderVendorWindow(game::GameHandler& gameHandler);
     void renderTrainerWindow(game::GameHandler& gameHandler);
+    void renderBarberShopWindow(game::GameHandler& gameHandler);
     void renderStableWindow(game::GameHandler& gameHandler);
     void renderTaxiWindow(game::GameHandler& gameHandler);
     void renderLogoutCountdown(game::GameHandler& gameHandler);
@@ -543,6 +544,15 @@ private:
     uint32_t vendorConfirmPrice_ = 0;
     std::string vendorConfirmItemName_;
 
+    // Barber shop UI state
+    int barberHairStyle_ = 0;
+    int barberHairColor_ = 0;
+    int barberFacialHair_ = 0;
+    int barberOrigHairStyle_ = 0;
+    int barberOrigHairColor_ = 0;
+    int barberOrigFacialHair_ = 0;
+    bool barberInitialized_ = false;
+
     // Trainer search filter
     char trainerSearchFilter_[128] = "";
 

src/game/game_handler.cpp

@@ -2681,8 +2681,8 @@ void GameHandler::handlePacket(network::Packet& packet) {
         }
         case Opcode::SMSG_ENABLE_BARBER_SHOP:
             // Sent by server when player sits in barber chair — triggers barber shop UI
-            // No payload; we don't have barber shop UI yet, so just log
             LOG_INFO("SMSG_ENABLE_BARBER_SHOP: barber shop available");
+            barberShopOpen_ = true;
             break;
         case Opcode::SMSG_FEIGN_DEATH_RESISTED:
             addUIError("Your Feign Death was resisted.");
@@ -4902,6 +4902,7 @@ void GameHandler::handlePacket(network::Packet& packet) {
                 uint32_t result = packet.readUInt32();
                 if (result == 0) {
                     addSystemChatMessage("Hairstyle changed.");
+                    barberShopOpen_ = false;
                 } else {
                     const char* msg = (result == 1) ? "Not enough money for new hairstyle."
                                     : (result == 2) ? "You are not at a barber shop."
@@ -19180,6 +19181,13 @@ void GameHandler::confirmTalentWipe() {
     talentWipeCost_ = 0;
 }
 
+void GameHandler::sendAlterAppearance(uint32_t hairStyle, uint32_t hairColor, uint32_t facialHair) {
+    if (state != WorldState::IN_WORLD || !socket) return;
+    auto pkt = AlterAppearancePacket::build(hairStyle, hairColor, facialHair);
+    socket->send(pkt);
+    LOG_INFO("sendAlterAppearance: hair=", hairStyle, " color=", hairColor, " facial=", facialHair);
+}
+
 // ============================================================
 // Phase 4: Group/Party
 // ============================================================

src/game/world_packets.cpp

@@ -5878,5 +5878,14 @@ network::Packet SetTitlePacket::build(int32_t titleBit) {
     return p;
 }
 
+network::Packet AlterAppearancePacket::build(uint32_t hairStyle, uint32_t hairColor, uint32_t facialHair) {
+    // CMSG_ALTER_APPEARANCE: uint32 hairStyle + uint32 hairColor + uint32 facialHair
+    network::Packet p(wireOpcode(Opcode::CMSG_ALTER_APPEARANCE));
+    p.writeUInt32(hairStyle);
+    p.writeUInt32(hairColor);
+    p.writeUInt32(facialHair);
+    return p;
+}
+
 } // namespace game
 } // namespace wowee

src/ui/game_screen.cpp

@@ -733,6 +733,7 @@ void GameScreen::render(game::GameHandler& gameHandler) {
     renderQuestOfferRewardWindow(gameHandler);
     renderVendorWindow(gameHandler);
     renderTrainerWindow(gameHandler);
+    renderBarberShopWindow(gameHandler);
     renderStableWindow(gameHandler);
     renderTaxiWindow(gameHandler);
     renderMailWindow(gameHandler);
@@ -2763,6 +2764,8 @@ void GameScreen::processTargetInput(game::GameHandler& gameHandler) {
                 gameHandler.closeGossip();
             } else if (gameHandler.isVendorWindowOpen()) {
                 gameHandler.closeVendor();
+            } else if (gameHandler.isBarberShopOpen()) {
+                gameHandler.closeBarberShop();
             } else if (gameHandler.isBankOpen()) {
                 gameHandler.closeBank();
             } else if (gameHandler.isTrainerWindowOpen()) {
@@ -16806,6 +16809,119 @@ void GameScreen::renderEscapeMenu() {
     ImGui::End();
 }
 
+// ============================================================
+// Barber Shop Window
+// ============================================================
+
+void GameScreen::renderBarberShopWindow(game::GameHandler& gameHandler) {
+    if (!gameHandler.isBarberShopOpen()) {
+        barberInitialized_ = false;
+        return;
+    }
+
+    const auto* ch = gameHandler.getActiveCharacter();
+    if (!ch) return;
+
+    uint8_t race = static_cast<uint8_t>(ch->race);
+    game::Gender gender = ch->gender;
+    game::Race raceEnum = ch->race;
+
+    // Initialize sliders from current appearance
+    if (!barberInitialized_) {
+        barberOrigHairStyle_ = static_cast<int>((ch->appearanceBytes >> 16) & 0xFF);
+        barberOrigHairColor_ = static_cast<int>((ch->appearanceBytes >> 24) & 0xFF);
+        barberOrigFacialHair_ = static_cast<int>(ch->facialFeatures);
+        barberHairStyle_ = barberOrigHairStyle_;
+        barberHairColor_ = barberOrigHairColor_;
+        barberFacialHair_ = barberOrigFacialHair_;
+        barberInitialized_ = true;
+    }
+
+    int maxHairStyle = static_cast<int>(game::getMaxHairStyle(raceEnum, gender));
+    int maxHairColor = static_cast<int>(game::getMaxHairColor(raceEnum, gender));
+    int maxFacialHair = static_cast<int>(game::getMaxFacialFeature(raceEnum, gender));
+
+    auto* window = core::Application::getInstance().getWindow();
+    float screenW = window ? static_cast<float>(window->getWidth()) : 1280.0f;
+    float screenH = window ? static_cast<float>(window->getHeight()) : 720.0f;
+    float winW = 300.0f;
+    float winH = 220.0f;
+    ImGui::SetNextWindowPos(ImVec2((screenW - winW) / 2.0f, (screenH - winH) / 2.0f), ImGuiCond_Appearing);
+    ImGui::SetNextWindowSize(ImVec2(winW, winH), ImGuiCond_Appearing);
+
+    ImGuiWindowFlags flags = ImGuiWindowFlags_NoCollapse;
+    bool open = true;
+    if (ImGui::Begin("Barber Shop", &open, flags)) {
+        ImGui::Text("Choose your new look:");
+        ImGui::Separator();
+        ImGui::Spacing();
+
+        ImGui::PushItemWidth(-1);
+
+        // Hair Style
+        ImGui::Text("Hair Style");
+        ImGui::SliderInt("##HairStyle", &barberHairStyle_, 0, maxHairStyle,
+                         "%d");
+
+        // Hair Color
+        ImGui::Text("Hair Color");
+        ImGui::SliderInt("##HairColor", &barberHairColor_, 0, maxHairColor,
+                         "%d");
+
+        // Facial Hair / Piercings / Markings
+        const char* facialLabel = (gender == game::Gender::FEMALE) ? "Piercings" : "Facial Hair";
+        // Some races use "Markings" or "Tusks" etc.
+        if (race == 8 || race == 6) facialLabel = "Features"; // Trolls, Tauren
+        ImGui::Text("%s", facialLabel);
+        ImGui::SliderInt("##FacialHair", &barberFacialHair_, 0, maxFacialHair,
+                         "%d");
+
+        ImGui::PopItemWidth();
+
+        ImGui::Spacing();
+        ImGui::Separator();
+
+        // Show whether anything changed
+        bool changed = (barberHairStyle_ != barberOrigHairStyle_ ||
+                        barberHairColor_ != barberOrigHairColor_ ||
+                        barberFacialHair_ != barberOrigFacialHair_);
+
+        // OK / Reset / Cancel buttons
+        float btnW = 80.0f;
+        float totalW = btnW * 3 + ImGui::GetStyle().ItemSpacing.x * 2;
+        ImGui::SetCursorPosX((ImGui::GetWindowWidth() - totalW) / 2.0f);
+
+        if (!changed) ImGui::BeginDisabled();
+        if (ImGui::Button("OK", ImVec2(btnW, 0))) {
+            gameHandler.sendAlterAppearance(
+                static_cast<uint32_t>(barberHairStyle_),
+                static_cast<uint32_t>(barberHairColor_),
+                static_cast<uint32_t>(barberFacialHair_));
+            // Keep window open — server will respond with SMSG_BARBER_SHOP_RESULT
+        }
+        if (!changed) ImGui::EndDisabled();
+
+        ImGui::SameLine();
+        if (!changed) ImGui::BeginDisabled();
+        if (ImGui::Button("Reset", ImVec2(btnW, 0))) {
+            barberHairStyle_ = barberOrigHairStyle_;
+            barberHairColor_ = barberOrigHairColor_;
+            barberFacialHair_ = barberOrigFacialHair_;
+        }
+        if (!changed) ImGui::EndDisabled();
+
+        ImGui::SameLine();
+        if (ImGui::Button("Cancel", ImVec2(btnW, 0))) {
+            gameHandler.closeBarberShop();
+        }
+    }
+    ImGui::End();
+
+    if (!open) {
+        gameHandler.closeBarberShop();
+    }
+}
+
 // ============================================================
 // Pet Stable Window
 // ============================================================