feat: implement CMSG_PET_RENAME with rename dialog in pet frame

- Add PetRenamePacket::build(petGuid, name, isDeclined) builder
- Add GameHandler::renamePet(newName) — sends packet via petGuid_
- Add 'Rename Pet' to pet frame context menu (right-click pet name)
- Modal input dialog with 12-char limit matches server validation

include/game/game_handler.hpp

@@ -609,6 +609,7 @@ public:
     void cancelCast();
     void cancelAura(uint32_t spellId);
     void dismissPet();
+    void renamePet(const std::string& newName);
     bool hasPet() const { return petGuid_ != 0; }
     uint64_t getPetGuid() const { return petGuid_; }
 

include/game/world_packets.hpp

@@ -2718,5 +2718,14 @@ public:
     static network::Packet build(uint64_t stableMasterGuid, uint32_t petNumber);
 };
 
+class PetRenamePacket {
+public:
+    /** CMSG_PET_RENAME: rename the player's active pet.
+     *  petGuid: the pet's object GUID (from GameHandler::getPetGuid())
+     *  name: new name (max 12 chars; server validates and may reject)
+     *  isDeclined: 0 for non-Cyrillic locales (no declined name forms) */
+    static network::Packet build(uint64_t petGuid, const std::string& name, uint8_t isDeclined = 0);
+};
+
 } // namespace game
 } // namespace wowee

include/ui/game_screen.hpp

@@ -434,6 +434,10 @@ private:
     char  gmTicketBuf_[2048] = {};
     void  renderGmTicketWindow(game::GameHandler& gameHandler);
 
+    // Pet rename modal (triggered from pet frame context menu)
+    bool petRenameOpen_ = false;
+    char petRenameBuf_[16] = {};
+
     // Inspect window
     bool  showInspectWindow_ = false;
     void  renderInspectWindow(game::GameHandler& gameHandler);

src/game/game_handler.cpp

@@ -14655,6 +14655,14 @@ void GameHandler::dismissPet() {
     socket->send(packet);
 }
 
+void GameHandler::renamePet(const std::string& newName) {
+    if (petGuid_ == 0 || state != WorldState::IN_WORLD || !socket) return;
+    if (newName.empty() || newName.size() > 12) return;  // Server enforces max 12 chars
+    auto packet = PetRenamePacket::build(petGuid_, newName, 0);
+    socket->send(packet);
+    LOG_INFO("Sent CMSG_PET_RENAME: petGuid=0x", std::hex, petGuid_, std::dec, " name='", newName, "'");
+}
+
 void GameHandler::requestStabledPetList() {
     if (state != WorldState::IN_WORLD || !socket || stableMasterGuid_ == 0) return;
     auto pkt = ListStabledPetsPacket::build(stableMasterGuid_);

src/game/world_packets.cpp

@@ -5421,5 +5421,13 @@ network::Packet UnstablePetPacket::build(uint64_t stableMasterGuid, uint32_t pet
     return p;
 }
 
+network::Packet PetRenamePacket::build(uint64_t petGuid, const std::string& name, uint8_t isDeclined) {
+    network::Packet p(wireOpcode(Opcode::CMSG_PET_RENAME));
+    p.writeUInt64(petGuid);
+    p.writeString(name);    // null-terminated
+    p.writeUInt8(isDeclined);
+    return p;
+}
+
 } // namespace game
 } // namespace wowee

src/ui/game_screen.cpp

@@ -3030,11 +3030,41 @@ void GameScreen::renderPetFrame(game::GameHandler& gameHandler) {
             if (ImGui::MenuItem("Target Pet")) {
                 gameHandler.setTarget(petGuid);
             }
+            if (ImGui::MenuItem("Rename Pet")) {
+                ImGui::CloseCurrentPopup();
+                petRenameOpen_ = true;
+                petRenameBuf_[0] = '\0';
+            }
             if (ImGui::MenuItem("Dismiss Pet")) {
                 gameHandler.dismissPet();
             }
             ImGui::EndPopup();
         }
+        // Pet rename modal (opened via context menu)
+        if (petRenameOpen_) {
+            ImGui::OpenPopup("Rename Pet###PetRename");
+            petRenameOpen_ = false;
+        }
+        if (ImGui::BeginPopupModal("Rename Pet###PetRename", nullptr,
+                                   ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoCollapse)) {
+            ImGui::Text("Enter new pet name (max 12 characters):");
+            ImGui::SetNextItemWidth(180.0f);
+            bool submitted = ImGui::InputText("##PetRenameInput", petRenameBuf_, sizeof(petRenameBuf_),
+                                              ImGuiInputTextFlags_EnterReturnsTrue);
+            ImGui::SameLine();
+            if (ImGui::Button("OK") || submitted) {
+                std::string newName(petRenameBuf_);
+                if (!newName.empty() && newName.size() <= 12) {
+                    gameHandler.renamePet(newName);
+                }
+                ImGui::CloseCurrentPopup();
+            }
+            ImGui::SameLine();
+            if (ImGui::Button("Cancel")) {
+                ImGui::CloseCurrentPopup();
+            }
+            ImGui::EndPopup();
+        }
         ImGui::PopStyleColor();
         if (petLevel > 0) {
             ImGui::SameLine();