refactor(chat): extract ItemTooltipRenderer, slim render(), consolidate utils

- Extract renderItemTooltip() (510 LOC) from ChatMarkupRenderer into
  dedicated ItemTooltipRenderer class; chat_markup_renderer.cpp 766→192 LOC
- Extract formatChatMessage(), detectChannelPrefix(), inputTextCallback()
  from render(); render() 711→376 LOC
- Consolidate replaceGenderPlaceholders() from 3 copies into
  chat_utils::replaceGenderPlaceholders(); remove 118 LOC duplicate from
  quest_log_screen.cpp, update 8 call sites in window_manager.cpp
- Delete chat_panel_commands.cpp (359 LOC) — absorb sendChatMessage,
  executeMacroText, PortBot helpers into chat_panel.cpp; move
  evaluateMacroConditionals to macro_eval_convenience.cpp
- Delete chat_panel_utils.cpp (229 LOC) — absorb small utilities into
  chat_panel.cpp
- Replace 3 forward declarations of evaluateMacroConditionals with
  #include "ui/chat/macro_evaluator.hpp"

Signed-off-by: Pavel Okhlopkov <pavel.okhlopkov@flant.com>

src/ui/chat/commands/target_commands.cpp

@@ -3,6 +3,7 @@
 //                  /focus, /clearfocus
 // Moved from ChatPanel::sendChatMessage() if/else chain (Phase 3).
 #include "ui/chat/i_chat_command.hpp"
+#include "ui/chat/macro_evaluator.hpp"
 #include "ui/chat_panel.hpp"
 #include "game/game_handler.hpp"
 #include "game/entity.hpp"
@@ -13,11 +14,6 @@
 
 namespace wowee { namespace ui {
 
-// Forward declaration of evaluateMacroConditionals (still in chat_panel_commands.cpp)
-std::string evaluateMacroConditionals(const std::string& rawArg,
-                                       game::GameHandler& gameHandler,
-                                       uint64_t& targetOverride);
-
 namespace {
 
 // Trim leading/trailing whitespace.