Add guild features, fix channel joining, and improve whisper reply

Guild: add disband, leader transfer, public/officer note commands with
roster context menu showing rank names and officer notes column. Auto-refresh
roster after guild events.

Channels: fix city/region channels not working by accepting SMSG_CHANNEL_NOTIFY
during ENTERING_WORLD state (server auto-joins before VERIFY_WORLD) and handling
PLAYER_ALREADY_MEMBER notification.

Whisper: /r now switches to whisper tab and sets target to last sender,
matching WoW behavior.

Camera: extend WMO collision raycasting to work outside WMOs too.

include/game/game_handler.hpp

@@ -340,6 +340,10 @@ public:
     void leaveGuild();
     void inviteToGuild(const std::string& playerName);
     void kickGuildMember(const std::string& playerName);
+    void disbandGuild();
+    void setGuildLeader(const std::string& name);
+    void setGuildPublicNote(const std::string& name, const std::string& note);
+    void setGuildOfficerNote(const std::string& name, const std::string& note);
     void acceptGuildInvite();
     void declineGuildInvite();
     void queryGuildInfo(uint32_t guildId);
@@ -353,6 +357,7 @@ public:
     const std::string& getGuildName() const { return guildName_; }
     const GuildRosterData& getGuildRoster() const { return guildRoster_; }
     bool hasGuildRoster() const { return hasGuildRoster_; }
+    const std::vector<std::string>& getGuildRankNames() const { return guildRankNames_; }
     bool hasPendingGuildInvite() const { return pendingGuildInvite_; }
     const std::string& getPendingGuildInviterName() const { return pendingGuildInviterName_; }
     const std::string& getPendingGuildInviteGuildName() const { return pendingGuildInviteGuildName_; }

include/game/opcode_table.hpp

@@ -117,6 +117,10 @@ enum class LogicalOpcode : uint16_t {
     SMSG_GUILD_QUERY_RESPONSE,
     SMSG_GUILD_INVITE,
     CMSG_GUILD_REMOVE,
+    CMSG_GUILD_DISBAND,
+    CMSG_GUILD_LEADER,
+    CMSG_GUILD_SET_PUBLIC_NOTE,
+    CMSG_GUILD_SET_OFFICER_NOTE,
     SMSG_GUILD_EVENT,
     SMSG_GUILD_COMMAND_RESULT,
 

include/game/world_packets.hpp

@@ -1003,6 +1003,30 @@ public:
     static network::Packet build(const std::string& playerName);
 };
 
+/** CMSG_GUILD_DISBAND packet builder (empty body) */
+class GuildDisbandPacket {
+public:
+    static network::Packet build();
+};
+
+/** CMSG_GUILD_LEADER packet builder */
+class GuildLeaderPacket {
+public:
+    static network::Packet build(const std::string& playerName);
+};
+
+/** CMSG_GUILD_SET_PUBLIC_NOTE packet builder */
+class GuildSetPublicNotePacket {
+public:
+    static network::Packet build(const std::string& playerName, const std::string& note);
+};
+
+/** CMSG_GUILD_SET_OFFICER_NOTE packet builder */
+class GuildSetOfficerNotePacket {
+public:
+    static network::Packet build(const std::string& playerName, const std::string& note);
+};
+
 /** CMSG_GUILD_ACCEPT packet builder (empty body) */
 class GuildAcceptPacket {
 public:

include/ui/game_screen.hpp

@@ -64,6 +64,10 @@ private:
     bool showChatWindow = true;
     bool showPlayerInfo = false;
     bool showGuildRoster_ = false;
+    std::string selectedGuildMember_;
+    bool showGuildNoteEdit_ = false;
+    bool editingOfficerNote_ = false;
+    char guildNoteEditBuffer_[256] = {0};
     bool refocusChatInput = false;
     bool chatWindowLocked = true;
     ImVec2 chatWindowPos_ = ImVec2(0.0f, 0.0f);