Add chat tabs, networked text emotes, channel system, and chat bubbles

Chat tabs filter messages into General/Combat/Whispers/Trade tabs. Text
emotes now send CMSG_TEXT_EMOTE to server and display incoming emotes
from other players. Channel system auto-joins General/Trade on login with
/join, /leave, and /1-/9 shortcuts. Chat bubbles render as ImGui overlays
above entities for SAY/YELL messages with fade-out animation.

include/game/game_handler.hpp

@@ -229,6 +229,15 @@ public:
      * @param target Target name (for whispers, empty otherwise)
      */
     void sendChatMessage(ChatType type, const std::string& message, const std::string& target = "");
+    void sendTextEmote(uint32_t textEmoteId, uint64_t targetGuid = 0);
+    void joinChannel(const std::string& channelName, const std::string& password = "");
+    void leaveChannel(const std::string& channelName);
+    const std::vector<std::string>& getJoinedChannels() const { return joinedChannels_; }
+    std::string getChannelByIndex(int index) const;
+
+    // Chat bubble callback: (senderGuid, message, isYell)
+    using ChatBubbleCallback = std::function<void(uint64_t, const std::string&, bool)>;
+    void setChatBubbleCallback(ChatBubbleCallback cb) { chatBubbleCallback_ = std::move(cb); }
 
     /**
      * Get chat history (recent messages)
@@ -845,6 +854,9 @@ private:
      * Handle SMSG_MESSAGECHAT from server
      */
     void handleMessageChat(network::Packet& packet);
+    void handleTextEmote(network::Packet& packet);
+    void handleChannelNotify(network::Packet& packet);
+    void autoJoinDefaultChannels();
 
     // ---- Phase 1 handlers ----
     void handleNameQueryResponse(network::Packet& packet);
@@ -1031,6 +1043,8 @@ private:
     // Chat
     std::deque<MessageChatData> chatHistory;    // Recent chat messages
     size_t maxChatHistory = 100;             // Maximum chat messages to keep
+    std::vector<std::string> joinedChannels_;   // Active channel memberships
+    ChatBubbleCallback chatBubbleCallback_;
 
     // Targeting
     uint64_t targetGuid = 0;

include/game/opcode_table.hpp

@@ -351,6 +351,19 @@ enum class LogicalOpcode : uint16_t {
     SMSG_ARENA_ERROR,
     MSG_INSPECT_ARENA_TEAMS,
 
+    // ---- Emotes ----
+    CMSG_EMOTE,
+    SMSG_EMOTE,
+    CMSG_TEXT_EMOTE,
+    SMSG_TEXT_EMOTE,
+
+    // ---- Channels ----
+    CMSG_JOIN_CHANNEL,
+    CMSG_LEAVE_CHANNEL,
+    SMSG_CHANNEL_NOTIFY,
+    CMSG_CHANNEL_LIST,
+    SMSG_CHANNEL_LIST,
+
     // Sentinel
     COUNT
 };

include/game/world_packets.hpp

@@ -670,6 +670,115 @@ public:
  */
 const char* getChatTypeString(ChatType type);
 
+// ============================================================
+// Text Emotes
+// ============================================================
+
+/**
+ * CMSG_TEXT_EMOTE packet builder
+ */
+class TextEmotePacket {
+public:
+    static network::Packet build(uint32_t textEmoteId, uint64_t targetGuid = 0);
+};
+
+/**
+ * SMSG_TEXT_EMOTE data
+ */
+struct TextEmoteData {
+    uint64_t senderGuid = 0;
+    uint32_t textEmoteId = 0;
+    uint32_t emoteNum = 0;
+    std::string targetName;
+
+    bool isValid() const { return senderGuid != 0; }
+};
+
+/**
+ * SMSG_TEXT_EMOTE parser
+ */
+class TextEmoteParser {
+public:
+    static bool parse(network::Packet& packet, TextEmoteData& data);
+};
+
+// ============================================================
+// Channel System
+// ============================================================
+
+/**
+ * CMSG_JOIN_CHANNEL packet builder
+ */
+class JoinChannelPacket {
+public:
+    static network::Packet build(const std::string& channelName, const std::string& password = "");
+};
+
+/**
+ * CMSG_LEAVE_CHANNEL packet builder
+ */
+class LeaveChannelPacket {
+public:
+    static network::Packet build(const std::string& channelName);
+};
+
+/**
+ * Channel notification types
+ */
+enum class ChannelNotifyType : uint8_t {
+    YOU_JOINED = 0x00,
+    YOU_LEFT = 0x01,
+    WRONG_PASSWORD = 0x02,
+    NOT_MEMBER = 0x03,
+    NOT_MODERATOR = 0x04,
+    PASSWORD_CHANGED = 0x05,
+    OWNER_CHANGED = 0x06,
+    PLAYER_NOT_FOUND = 0x07,
+    NOT_OWNER = 0x08,
+    CHANNEL_OWNER = 0x09,
+    MODE_CHANGE = 0x0A,
+    ANNOUNCEMENTS_ON = 0x0B,
+    ANNOUNCEMENTS_OFF = 0x0C,
+    MODERATION_ON = 0x0D,
+    MODERATION_OFF = 0x0E,
+    MUTED = 0x0F,
+    PLAYER_KICKED = 0x10,
+    BANNED = 0x11,
+    PLAYER_BANNED = 0x12,
+    PLAYER_UNBANNED = 0x13,
+    PLAYER_NOT_BANNED = 0x14,
+    PLAYER_ALREADY_MEMBER = 0x15,
+    INVITE = 0x16,
+    INVITE_WRONG_FACTION = 0x17,
+    WRONG_FACTION = 0x18,
+    INVALID_NAME = 0x19,
+    NOT_MODERATED = 0x1A,
+    PLAYER_INVITED = 0x1B,
+    PLAYER_INVITE_BANNED = 0x1C,
+    THROTTLED = 0x1D,
+    NOT_IN_AREA = 0x1E,
+    NOT_IN_LFG = 0x1F,
+};
+
+/**
+ * SMSG_CHANNEL_NOTIFY data
+ */
+struct ChannelNotifyData {
+    ChannelNotifyType notifyType = ChannelNotifyType::YOU_JOINED;
+    std::string channelName;
+    uint64_t senderGuid = 0;
+
+    bool isValid() const { return !channelName.empty(); }
+};
+
+/**
+ * SMSG_CHANNEL_NOTIFY parser
+ */
+class ChannelNotifyParser {
+public:
+    static bool parse(network::Packet& packet, ChannelNotifyData& data);
+};
+
 // ============================================================
 // Server Info Commands
 // ============================================================

include/rendering/renderer.hpp

@@ -125,6 +125,7 @@ public:
     void cancelEmote();
     bool isEmoteActive() const { return emoteActive; }
     static std::string getEmoteText(const std::string& emoteName, const std::string* targetName = nullptr);
+    static uint32_t getEmoteDbcId(const std::string& emoteName);
 
     // Targeting support
     void setTargetPosition(const glm::vec3* pos);

include/ui/game_screen.hpp

@@ -49,6 +49,16 @@ private:
     int lastChatType = 0;  // Track chat type changes
     bool chatInputMoveCursorToEnd = false;
 
+    // Chat tabs
+    int activeChatTab_ = 0;
+    struct ChatTab {
+        std::string name;
+        uint32_t typeMask;  // bitmask of ChatType values to show
+    };
+    std::vector<ChatTab> chatTabs_;
+    void initChatTabs();
+    bool shouldShowMessage(const game::MessageChatData& msg, int tabIndex) const;
+
     // UI state
     bool showEntityWindow = false;
     bool showChatWindow = true;
@@ -170,6 +180,7 @@ private:
     void renderMinimapMarkers(game::GameHandler& gameHandler);
     void renderGuildRoster(game::GameHandler& gameHandler);
     void renderGuildInvitePopup(game::GameHandler& gameHandler);
+    void renderChatBubbles(game::GameHandler& gameHandler);
 
     /**
      * Inventory screen
@@ -209,6 +220,17 @@ private:
     // Gender placeholder replacement
     std::string replaceGenderPlaceholders(const std::string& text, game::GameHandler& gameHandler);
 
+    // Chat bubbles
+    struct ChatBubble {
+        uint64_t senderGuid = 0;
+        std::string message;
+        float timeRemaining = 0.0f;
+        float totalDuration = 0.0f;
+        bool isYell = false;
+    };
+    std::vector<ChatBubble> chatBubbles_;
+    bool chatBubbleCallbackSet_ = false;
+
     // Left-click targeting: distinguish click from camera drag
     glm::vec2 leftClickPressPos_ = glm::vec2(0.0f);
     bool leftClickWasPress_ = false;