Add Achievements list window (Y key toggle) with search filter

include/ui/game_screen.hpp

@@ -354,6 +354,11 @@ private:
 
     // Dungeon Finder state
     bool  showDungeonFinder_ = false;
+
+    // Achievements window
+    bool  showAchievementWindow_ = false;
+    char  achievementSearchBuf_[128] = {};
+    void  renderAchievementWindow(game::GameHandler& gameHandler);
     uint8_t lfgRoles_ = 0x08;  // default: DPS (0x02=tank, 0x04=healer, 0x08=dps)
     uint32_t lfgSelectedDungeon_ = 861;  // default: random dungeon (entry 861 = Random Dungeon WotLK)
 

include/ui/keybinding_manager.hpp

@@ -30,6 +30,7 @@ public:
         TOGGLE_NAMEPLATES,
         TOGGLE_RAID_FRAMES,
         TOGGLE_QUEST_LOG,
+        TOGGLE_ACHIEVEMENTS,
         ACTION_COUNT
     };